Skocz do pozycji: 1.

Tytuł:

Global linearization of nonlinear systems - A survey

Autorzy:

Čelikovský, Sergej

Powiązania:

https://bibliotekanauki.pl/articles/1359660.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

exact linearization
nonlinear control
global linearization

Opis:

A survey of the global linearization problem is presented. Known results are divided into two groups: results for general affine nonlinear systems and for bilinear systems. In the latter case stronger results are available. A comparision of various linearizing transformations is performed. Numerous illustrative examples are included.

Źródło:

Banach Center Publications; 1995, 32, 1; 123-137
0137-6934

Pojawia się w:

Banach Center Publications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Statistical and equivalent linearization techniques with probability density criteria

Autorzy:

Socha, L.

Powiązania:

https://bibliotekanauki.pl/articles/280239.pdf

Data publikacji:

1999

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

random vibration
linearization techniques
Duffing oscillator

Opis:

The concept of statistical and equvalent linearization with probability density criteria for dynamic systems under Gaussian excitation is considered in the paper. New criteria of linearization and two approximate approaches are proposed. In the first one (statistical linearization) in order to establish the linearization coefficients and response characteristics the output probability density functions of statistic nonlinear element and the corresponding static linearized element are used in an iterative procedure. In the second approach (equivalent linearization) the direct minimization of a criterion based on output probability density functions of dynamic nonlinear system is proposed. The detailed analysis and numerical results are given for the Duffing oscillator.
W pracy zaproponowano metodę statystycznej i równoważnej linearyzacji dla układów dynamicznych z wymuszeniami o charakterze białych szumów Gaussowskich i kryteriami w przestrzeni funkcji gęstości prawdopodobieństw. Przy wyznaczaniu współczynników linearyzacji i charakterystyk rozwiązań układu dynamicznego za pomocą metody statystycznej linearyzacji korzysta się z minimalizacji kryterium uwzględniającego różnicę wyjściowych funkcji gęstości prawdopodobieństw odpowiednio elementu nieliniowego zlinearyzowanego oraz pewnej procedury iteracyjnej. W przypadku równoważnej linearyzacji przeprowadza się bezpośrednią minimalizację kryterium uwzględniającego różnicę wyjściowych funkcji gęstości prawdopodobieństw odpowiednio układów dynamicznych nieliniowego i zlinearyzowanego. Szczegółową analizę i obliczenia numeryczne przeprowadzono dla oscylatora Duffinga.

Źródło:

Journal of Theoretical and Applied Mechanics; 1999, 2; 369-382
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

An analysis of influence of SMA material on dynamic properties of a spring taking into account constructional friction

Autorzy:

Gałkowski, Z.

Powiązania:

https://bibliotekanauki.pl/articles/1986962.pdf

Data publikacji:

2002

Wydawca:

Politechnika Gdańska

Tematy:

control
SMA
constructional friction
connection
linearization

Opis:

In this paper, an analysis of forced transverse harmonic vibration with constant changes of the exciting force in a dynamic system consisting of two beams is presented together with a model of a leaf spring. In this junction both beams are made of shape memory material (SMA). The constructional friction is also taken into account. For the purpose of the analysis an equivalent linearization of the elasticity-damping features of the beams was conducted. As an effect of linearization a junction was acquired with both stiffness of elements and viscosity damping. The obtained differential equations were solved using the asymptotic Bogolubov-Krylov-Mitropolski method. The results of the conducted simulation are presented on graphs, showing the influence of unitary pressure on the system's damping properties.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 3; 351-361
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Weakly nonlinear regression model with constraints I: nonlinear hypothesis

Autorzy:

Kubácek, Lubomír
Tesaríková, Eva

Powiązania:

https://bibliotekanauki.pl/articles/729706.pdf

Data publikacji:

2005

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

regression model with constraints
nonlinear hypothesis
linearization

Opis:

The problem considered is under which conditions in weakly nonlinear regression model with constraints I a weakly nonlinear hypothesis can be tested by linear methods. The aim of the paper is to find a region around the approximate value of the regression parameter with the following property. If we are certain that the actual value of the regression parameter is in this region, then the linear method of testing can be used without any significant deterioration of the inference.

Źródło:

Discussiones Mathematicae Probability and Statistics; 2005, 25, 1; 115-133
1509-9423

Pojawia się w:

Discussiones Mathematicae Probability and Statistics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

The design of ship autopilot by applying observer – based feedback linearization

Autorzy:

Zwierzewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/259972.pdf

Data publikacji:

2015

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

ship autopilot design
feedback linearization
nonlinear observer

Opis:

The paper considers the problem of ship autopilot design based on Bech’s model of the vessel. Since the model is highly nonlinear and some of the state vector coordinates are unavailable, the control system synthesis is performed by means of an output feedback linearization method combined with a nonlinear observer. The asymptotic stability of the overall system has been proven, including the asymptotic stability of the system internal dynamics. The performed simulations of the ship course-changing process have confirmed a high performance of the proposed controller. It has been emphasized that for its practical usability the system robustification is necessary.

Źródło:

Polish Maritime Research; 2015, 1; 16-21
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Linearisierungsmöglichkeiten und Kasuszuweisung in deverbalen Nominalphrasen. Ein deutsch-polnischer Vergleich
Linearization and case assignment in deverbal noun phrases. A comparison of German and Polisch

Autorzy:

Aptacy, Jarosław

Powiązania:

https://bibliotekanauki.pl/articles/916994.pdf

Data publikacji:

2018-11-05

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

noun phrase
adjacency
Genitive
Linearization of DPs

Opis:

In the following paper German and Polish deverbal noun phrases will be examined in respect to the linearization of their constituents. The point of departure will be the adjacency condition which is obligatory in the Genitive DPs in German, but optional in Polish. In other words, Polish displays more linearization possibilities than German. In addition to adjacency which is conditioned by grammar also communicative factors and text grammar condition the linearization of DPs. Constituents with a higher comment value tend to appear as far to the right of the deverbal noun as possible, while topic constituents stand closer to the noun.

Źródło:

Glottodidactica. An International Journal of Applied Linguistics; 2010, 36, 1; 9-19
0072-4769

Pojawia się w:

Glottodidactica. An International Journal of Applied Linguistics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Application of atatistical linearization techniques to design of quqsi-optimal active control of nonlinear system

Autorzy:

Socha, L.

Powiązania:

https://bibliotekanauki.pl/articles/279701.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

statistical linearization
stochastic optimal control
active suspensions

Opis:

A comparison between the applicability of statistical linearizationmethods with moment criteria and criteria in probability density space to the determination of quasi-optimal external control for the nonlinear dynamic system excited by a coloured Gaussian noise and the mean square criterion is discussed in this paper. To determine the quasi-optimal control two modified versions of a standard iterative procedure are proposed, where three versions of statistical linearization with moment criteriaand two versions with criteria in the probability density space were combined with the optimal control method for linear systems with the mean square criterion. The detailed considerations are given for a nonlinear 2-degree-of-freedom system with external control force excited by a coloured Gaussian noise which is treated as an outputof 2D linear filter. The control is assumed as a linear feedback. The obtained results are illustrated by a numerical example.Zastosowanie sta
zastosowanie statystycznej linearyzacji w nieliniowych układach do wyznaczania kwazi-optymalnego aktywnego sterowania. W pracy przedstawiono porównanie zastosowania kilku metod statystycznej linearyzacji z kryteriami momentowymi oraz z przestrzeni gęstości prawdopodobieństw do wyznaczania kwazi-optymalnego, addytywnego sterowaniaw układach nieliniowych z wymuszeniem w postaci kolorowego Gaussowskiego szumu i ze średnio kwadratowym kryterium optymalizacji. W celu wyznaczenia kwazi-optymalnego sterowania zaproponowano dwie zmodyfikowane wersje standardowej procedury iteracyjnej, gdzie trzy wersje statystycznej linearyzacji z momentowymi kryteriami i dwie wersje z kryteriami w przestrzeni gęstości prawdopodobieństw wykorzystano łącznie ze standardowym algorytmem wyznaczania sterowania optymalnego w układach liniowych ze średniokwadratowym wskaźnikiem jakości. Szczegółowa analiza została przedstawiona dla układów o dwu stopniach swobody z zewnętrznym wymuszeniem w postaci Gaussowskiego szumu kolorowego traktowanego jako wyjście z dwuwymiarowego filtru liniowego. Sterowanie przyjęto jako liniowe sprzężenie zwrotne. Otrzymane wyniki zilustrowano na przykładzie numerycznym.

Źródło:

Journal of Theoretical and Applied Mechanics; 2000, 38, 3; 591-605
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Linearyzacja modelu matematycznego siłownika hydraulicznego połączonego z ramieniem manipulatora
Linearization of the mathematical model of a hydraulic actuator connected to a manipulator arm

Autorzy:

Cedro, L.
Janecki, D.

Powiązania:

https://bibliotekanauki.pl/articles/151701.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

linearyzacja
układ hydrauliczny
linearization
hydraulic actuator system

Opis:

Streszczenie W pracy przedstawiono metodę linearyzacji modelu matematycznego układu hydraulicznego połączonego z ramieniem manipulatora. Układ zamodelowano w dwóch postaciach: w postaci równań różniczkowych, oraz modelu quasi-liniowego. Uzyskany model uproszczony poddano weryfikacji z modelem dokładnym. Model taki może być wykorzystany w procesach identyfikacji metodą najmniejszych kwadratów, która jest jedną z najbardziej efektywnych metod identyfikacji. Drugim obszarem zastosowań może być projektowanie układów regulacji.
The paper presents the method of linearization of a hydraulic actuator system connected to a manipulator arm. Fig. 1 shows a drive system supplied with constant pressure . The flow controller (2) acts as a throttling valve, while the hydraulic actuator (1) is a receiver. The constant pressure is provided by the pump (3). The arm-actuator system presented in Fig. 2 is a one-dimensional model. In the analysis, the elements connecting the actuator to the arm are not taken into consideration. This way it is easier to determine the system dynamic properties. The method used in this study requires expanding the linear function in a Taylor series around the operating point and considering linear terms only. After linearization of the mathematical model of a manipulator connected to a hydraulic actuator, there was obtained a simplified model (7) representing well the real system model behaviour (1). The simplified model was compared with the accurate one. In the case of the second-order, quasi-linear model and the mathematical model of the hydraulic actuator system, both signals fully coincide (Fig. 6). That is why the simplification to such a form is justified. The hydraulic actuator system was designed in two forms: as differential equations(1) (accurate model), and as a quasi-linear model (10) (simplified one). The simplified model can be used for identification purposes using the least squares method, which is one of the most effective identification method. Another area of application can be design of control systems.

Źródło:

Pomiary Automatyka Kontrola; 2009, R. 55, nr 2, 2; 126-130
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Control of an Induction Motor Using Sliding Mode Linearization

Autorzy:

Etien, E.
Cauet, E.
Rambault, L.
Champenois, G.

Powiązania:

https://bibliotekanauki.pl/articles/908504.pdf

Data publikacji:

2002

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

automatyka
induction motor
sliding mode control
linearization

Opis:

Nonlinear control of the squirrel induction motor is designed using sliding mode theory. The developed approach leads to the design of a sliding mode controller in order to linearize the behaviour of an induction motor. The second problem described in the paper is decoupling between two physical outputs: the rotor speed and the rotor flux modulus. The sliding mode tools allow us to separate the control from these two outputs. To take account of parametric variations, a model-based approach is used to improve the robustness of the control law despite these perturbations. Experimental results obtained with a laboratory setup illustrate the good performance of this technique.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2002, 12, 4; 523-531
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

How to deal with regression models with a weak nonlinearity

Autorzy:

Tesaríková, Eva
Kubáček, Lubomír

Powiązania:

https://bibliotekanauki.pl/articles/729868.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

nonlinear regression model
criteria of linearization
demo program

Opis:

If a nonlinear regression model is linearized in a non-sufficient small neighbourhood of the actual parameter, then all statistical inferences may be deteriorated. Some criteria how to recognize this are already developed. The aim of the paper is to demonstrate the behaviour of the program for utilization of these criteria.

Źródło:

Discussiones Mathematicae Probability and Statistics; 2001, 21, 1; 21-48
1509-9423

Pojawia się w:

Discussiones Mathematicae Probability and Statistics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Finite-time stability and stabilization of singular state-delay systems using improved estimation of a lower bound on a Lyapunov-like functional

Autorzy:

Stojanovic, S. B.
Debeljkovic, D. Lj.
Antic, D. S.

Powiązania:

https://bibliotekanauki.pl/articles/200145.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

singular systems
time-delay
LMIs
finite-time stability
stabilizing controllers
cone complementarity
linearization
cone complementarity linearization algorithm
systemy pojedyńcze
czas opóźnienia
stabilność w czasie skończonym
kontrolery stabilizujące
komplementarność
linearyzacja
algorytm cone complementarity linearization

Opis:

In this paper, the problems of finite-time stability and stabilization for a class of singular time-delay systems are studied. Using the Lyapunov-like functional (LLF) with (exponential or power) weighting function and a new estimation method for the lower bound on LLF, some sufficient stability conditions are introduced. It is shown that the weighting function significantly reduces the conservatism of the stability criteria in comparison to estimation of the lower bound on LLF without this function. To solve the finite-time stabilization problem, a stabilizing linear state controller is designed by exploiting the cone complementarity linearization algorithm. Two numerical examples are given to illustrate the effectiveness of the proposed method.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 479-487
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

On the ship course-keeping control system design by using robust feedback linearization

Autorzy:

Zwierzewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/260552.pdf

Data publikacji:

2013

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

feedback linearization
robust control
differential games
ship autopilot design

Opis:

In the paper the problem of ship autopilot design based on feedback linearization method combined with the robust control approach, is considered. At first the nonlinear ship model (of Norrbin type) is linearized with the use of the simple system nonlinearity cancellation. Next, bearing in mind that exact values of the model parameters are not known, the ensuing inaccuracies are taken as disturbances acting on the system. Thereby is obtained a linear system with an extra term representing the uncertainty which can be treated by using robust, H∞optimal control techniques. The performed simulations of ship course-changing process confirmed a high performance of the proposed controller despite the assumed significant errors of its parameters.

Źródło:

Polish Maritime Research; 2013, 1; 70-76
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Oscillatory criteria via linearization of half-linear second order delay differential equations

Autorzy:

Baculikova, Blanka
Dzurina, Jozef

Powiązania:

https://bibliotekanauki.pl/articles/255725.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

second order differential equations
delay
monotonic properties
linearization
oscillation

Opis:

In the paper, we study oscillation of the half-linear second order delay differential equations of the form [formula]. We introduce new monotonic properties of its nonoscillatory solutions and use them for linearization of considered equation which leads to new oscillatory criteria. The presented results essentially improve existing ones.

Źródło:

Opuscula Mathematica; 2020, 40, 5; 523-536
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

The linearization of mooring load distribution problem

Autorzy:

Artyszuk, J.

Powiązania:

https://bibliotekanauki.pl/articles/135702.pdf

Data publikacji:

2016

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

ship manoeuvring
mooring
berthing
hydrodynamics
loads
linear model
linearization

Opis:

This paper presents a novel step forward in finding the loads of particular mooring ropes that balance the steady environmental excitations for a ship staying at berth. The industrial static equilibrium method for a rough assessment of ship mooring safety is considered to be well-established. The static loads are directly related to the rope’s MBLs (minimum breaking loads) while applying a certain safety margin (usually 50%). The problem is reduced to a set of linear equations that may be solved analytically. The generality in terms of arbitrary horizontal and vertical angles of mooring ropes is preserved. All derivations are provided to enhance trust in the very simple yet absolutely accurate and fast linear solution. The accuracy is studied both analytically, throughout all the development stages, and finally by comparison to the exact numerical solution of the original nonlinear equilibrium equations for an exemplary mooring pattern. A discussion of selected effects in load distribution is also given. Using the approach presented, for instance, we can efficiently test mooring safety when any mooring rope of the set is accidentally broken.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 9-16
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Test bench and simulation research on hydrodynamic torque converter for different input signals

Autorzy:

Wozniak, M.
Siczek, K.
Pawelski, Z.

Powiązania:

https://bibliotekanauki.pl/articles/247933.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

torque converter
torque
Matlab/Simulink
linearization
nonlinear model
ARX
OE

Opis:

This paper presents the experimental research and simulating results of a ZM130 hydrodynamic torque converter under steady and unsteady working conditions with an external step signal and sinus on turbine’s shaft on a modified test bench. The mathematical model of torque converter was described by the one-dimensional flow theory with variable loss coefficients. The character of received equations from test bend showed by linearized transmittance functions with variable coefficients. For test bend object identification researches will be used an Identification Toolbox from a mathematical code in Matlab, which enables to create transfer functions as a linear model from measurements data as they got the highest correctness level with input signal (as they get the best correction level with input signal on the pump´s shaft). This mathematical model for dynamic loads will be verified by experimental tests. The aim of the carried out studies was determination the effect of sampling time decreasing on the quality of measured parameters. Results of present investigations were compared with those obtained earlier, but for the same input signals .It is possible to affirm that proposed theoretical model imitates the change of dynamic parameters, and the same the property of the torque converter. Researches led on the test bend with extortion input torque sinus signal on the turbine’s shaft confirmed correctness of this model.

Źródło:

Journal of KONES; 2016, 23, 4; 561-568
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Ship course stabilization by feedback linearization with adaptive object model

Autorzy:

Borkowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/259940.pdf

Data publikacji:

2014

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

ship course stabilization
feedback linearization controller
GRBF
safety of navigation

Opis:

The algorithm of ship course stabilization herein presented is based on a feedback linearization controller with adaptive object model. The described method, consisting in current approximation of unknown object model functions by neuro-fuzzy approximators, represents a new generation of adaptive control methods. The implementation of this algorithm, which may constitute an executive module of a navigational decision support system, will contribute to a higher degree of automation and navigational safety improvement.

Źródło:

Polish Maritime Research; 2014, 1; 14-19
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Transistor-based temperature measuring device
Tranzystorowy układ do pomiaru temperatury

Autorzy:

Hotra, Oleksandra

Powiązania:

https://bibliotekanauki.pl/articles/407702.pdf

Data publikacji:

2020

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

temperature measurement
transistor structure
linearization
pomiar temperatury
struktura tranzystorowa
linearyzacja

Opis:

The schematic diagrams of the temperature measuring device based on transistor structures are presented in the paper. The temperature dependence of collector current without and with linearization of the conversion function is analysed. The linearization method based on compensation current formation is proposed. This allowed to reduce the temperature measurement error up to ± 0.006°C over the temperature ranges 40… 60°C and 60… 80°C and up to 0.08°C over the temperature range 10… 90°C.
W artykule zostały przedstawione schematy miernika temperatury opartego na strukturach tranzystorowych. Została przeanalizowana zależność prądu kolektora od temperatury bez i przy zastosowaniu linearyzacji funkcji przetwarzania. Zaproponowano metodę linearyzacji opartą na formowaniu prądu kompensacyjnego, która pozwoliła zmniejszyć błąd pomiaru temperatury do ± 0,006°C w zakresach temperatury 40… 60°C i 60… 80°C oraz do ±0,08°C w zakresie 10… 90°C.

Źródło:

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 2; 4-7
2083-0157
2391-6761

Pojawia się w:

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Collocation method based on barycentric interpolation iteration for analysis of nonlinear microbeams

Autorzy:

Zhuang, M.
Miao, C.
Wang, Z.

Powiązania:

https://bibliotekanauki.pl/articles/279890.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

nonlinear microbeams
barycentric Lagrange interpolation
collocation method
linearization method
iteration method

Opis:

A powerful computational methodology, named the barycentric Lagrange interpolation iteration collocation method (BLIICM), for solving nonlinear bending problems of a doubly clamped microbeam under electrostatic loads is presented. The nonlinear governing equation of the microbeam is converted into a linear differential equation by assuming the initial function. The barycentric Lagrange interpolation collocation method (BLICM) is used to solve the linear differential equation. The direct linearization formulations and Newton linearization calculation formulations for the nonlinear differential equation have been given. The calculation method and formulation of the nonlinear integral term have been discussed in details. By applying a barycentric Lagrange interpolation differential matrix, a matrix-vector calculation formula of BLIICM has been established. Numerical results of calculation examples show that the advantages of the proposed methodology are efficient, simple and of high precision.

Źródło:

Journal of Theoretical and Applied Mechanics; 2018, 56, 3; 741-749
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Investigation of the dynamics of singular protected systems

Autorzy:

Naumeyko, I.
Alja'afreh, M.

Powiązania:

https://bibliotekanauki.pl/articles/411040.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

"Man-Machine-Environment" model
non-linear system
singular equations
asymptotic
linearization

Opis:

The analysis of asymptotic representations of the systems protected from harmful influences is carried out. Various types of general models of the "manmachineenvironment" with protection are considered. Each of them adequately describes some of the practically important qualities of the object, and they all together describe the object in terms of its safe operation. The dynamic properties of complex ergonomic systems, presented in the form of systems of differential equations with a small parameter at the derivative are investigated The methods of reducing the impact on the person of harmful factors are theoretically substantiated. The dynamic protection response speed is considered to be significantly greater than the harmful factor production rate. Numerical solution of the general problem and the analytical solution for autonomous case is obtained for harmful effects. By using asymptotic the system of equations has been solved in closed form not only for autonomous case, but also for parameters smoothly changing in time. The estimates of the cost of protection was obtained for the various cost-functionals and for different functions in the right-hand side of the equation describing the dynamics of protection. To assess the accuracy of model calculations and for graphic representation of the results mathematical package MAXIMA is used.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 4; 37-42
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Wavelet-based numerical solution for MHD boundary-layer flow due to stretching sheet

Autorzy:

Karkera, Harinakshi
Katagi, Nagaraj N.

Powiązania:

https://bibliotekanauki.pl/articles/2106444.pdf

Data publikacji:

2021

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

magnetohydrodynamika
przepływ
linearyzacja
MHD flow
boundary layer
quasi-linearization
Haar wavelets

Opis:

In this paper, a two-dimensional steady flow of a viscous fluid due to a stretching sheet in the presence of a magnetic field is considered. We proposed two new numerical schemes based on the Haar wavelet coupled with a collocation approach and quasi-linearization process for solving the Falkner-Skan equation representing the governing problem. The important derived quantities representing the fluid velocity and wall shear stress for various values of flow parameters Mand βare calculated. The proposed methods enable us to obtain the solutions even for negative β, nonlinear stretching parameter, and smaller values of the magnetic parameter ()M1< which was missing in the earlier findings. Numerical and graphical results obtained show an excellent agreement with the available findings and demonstrate the efficiency and accuracy of the developed schemes. Another significant advantage of the present method is that it does not depends on small parameters and initial presumptions unlike in traditional semi-analytical and numerical methods.

Źródło:

International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 84--103
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Impact of Using an Inerter on the Performance of Vehicle Active Suspension

Autorzy:

Alshabatat, Nabeel
Shaqarin, Tamir

Powiązania:

https://bibliotekanauki.pl/articles/2201718.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

inerter
active suspension
nonlinear quarter-car model
ride comfort
feedback linearization

Opis:

This paper investigates the effect of employing an inerter on the performance of active suspension systems. A quarter-car model with cubic-nonlinear spring is considered. The inerter is installed in parallel with the primary suspension spring and damper. First, feedback linearization (FBL) is used to linearize the mathematical model. Then the linear quadratic regulator (LQR) is adopted to control the suspension system. The proposed design is ride comfort-oriented and considers structural constraints. Numerical simulations are executed for passive systems with different values of inertance. Results show that employing an inerter to the passive suspension can improve the ride comfort performance by more than 32%. Employing an inerter to active suspension systems can also improve the ride comfort and reduce actuator force significantly. The actuator force can be reduced by 25%. However, the results also show that the uncaring selection of the inerter can dramatically degrade the performance of the suspension system.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 3; 331--339
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Dynamic balance research of protected systems

Autorzy:

Naumeyko, I.
Alja'afreh, M.

Powiązania:

https://bibliotekanauki.pl/articles/411213.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

Non-linear system
singular points
eigenvalues
asymptotic behavior
first approximation
linearization

Opis:

The dynamic models of the complex ergatic objects' behavior, presented in the form of differentia equations and their systems were studied. The stability and other properties are researched. The methods of analysis and reduce of harmful factors and their impact on people were theoretically proved. The methods of analysis and critical points removal in dynamic models of hazards distribution are offered. The object of study is the system of the harmful external factors protection. Subject of research is the system of two nonlinear differential equations as a model of technical systems with protection. The object of protection is described by logistic equation. and defense system - by non-linear differential equation with a security functions of rather general form. This paper describes critical modes analysis and stationary states’ stability of protected systems with harmful influences. Numerical solution of general problem and also the analytical solution for the case of fixed expected harmful effects have been obtained. Various types of general models for "Man-machine-environment" systems were studied. Each of describes some kind of the practically important quality of object in an appropriate way. And All together they describe the object in terms of it’s safe operation. Their further detailing process results to either well-known, or some new subsystems’ models. Systems with "fast" protection at a relatively slow dynamics of the object were studied. This leads to the models with small parameter and asymptotic solutions of differentia equations. Some estimates for protection cost in different price-functional and for different functions in the right part of equation, which describes the dynamics of defense were obtained. For calculations, analysis and graphical representations some of mathematical packages was applied.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 3; 85-90
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 23.

Tytuł:

Linearization of the product of orthogonal polynomials of a discrete variable

Autorzy:

Belmehdi, Saïd
Lewanowicz, Stanisław
Ronveaux, André

Powiązania:

https://bibliotekanauki.pl/articles/1339159.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

linearization coefficients
classical orthogonal polynomials of a discrete variable
recurrence relations

Opis:

Let {$P_k$} be any sequence of classical orthogonal polynomials of a discrete variable. We give explicitly a recurrence relation (in k) for the coefficients in $P_iP_j=\sum_kc(i,j,k)P_k$, in terms of the coefficients σ and τ of the Pearson equation satisfied by the weight function ϱ, and the coefficients of the three-term recurrence relation and of two structure relations obeyed by {$P_k$}.

Źródło:

Applicationes Mathematicae; 1996-1997, 24, 4; 445-455
1233-7234

Pojawia się w:

Applicationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Non-linear stochastic dynamics of a cable-mass system with finite bending stiffness via an equivalent linearization technique

Autorzy:

Weber, Hanna
Kaczmarczyk, Stefan
Iwankiewicz, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/1839662.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

stochastic dynamics
nonlinear systems
cable
finite bending stiffness
equivalent
linearization techniques

Opis:

The non-linear stochastic dynamic behaviour of a high-rise vertical transportation system modelled as a concentrated mass and a cable with finite bending stiffness is considered. The slow time scale is defined and lateral cable displacements coupled with transverse motions are expanded in terms of approximating functions. The excitation of the high-rise building is assumed in the form of a narrow-band mean-square process equivalent to the harmonic process. The equivalent linearization technique is used to replace the original non-linear system with a linear approximation whose coefficients are determined from minimization of the mean-square equation difference between both systems.

Źródło:

Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 483-497
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 25.

Tytuł:

Linearization of Arbitrary products of classical orthogonal polynomials

Autorzy:

Hounkonnou, Mahouton
Belmehdi, Said
Ronveaux, André

Powiązania:

https://bibliotekanauki.pl/articles/1208207.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

classical orthogonal polynomials
Hermite orthogonal polynomials
linearization coefficients
recurrence relations
differential equations

Opis:

A procedure is proposed in order to expand $w=\prod^N_{j=1} P_{i_j}(x)=\sum^M_{k=0} L_ k P_ k(x)$ where $P_i(x)$ belongs to aclassical orthogonal polynomial sequence (Jacobi, Bessel, Laguerre and Hermite) ($M=\sum^N_{j=1} i_j$). We first derive a linear differential equation of order $2^N$ satisfied by w, fromwhich we deduce a recurrence relation in k for the linearizationcoefficients $L_k$. We develop in detail the two cases $[P_i(x)]^N$, $P_ i(x)P_ j(x)P_ k(x)$ and give the recurrencerelation in some cases (N=3,4), when the polynomials $P_i(x)$are monic Hermite orthogonal polynomials.

Źródło:

Applicationes Mathematicae; 2000, 27, 2; 187-196
1233-7234

Pojawia się w:

Applicationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Model Predictive Control of the ship’s motion in presence of wind disturbances

Autorzy:

Miller, A.

Powiązania:

https://bibliotekanauki.pl/articles/359988.pdf

Data publikacji:

2014

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

Model Predctive Control
MPC
ship’s velocity control
wind disturbances
model linearization

Opis:

Model Predictive Control is a control strategy which can be used for ships guidance and trajectory tracking problems. Linear multidimensional MPC controller is used to control the transversal, longitudinal and rotational velocities of a ship. Control system based on the MPC algorithms is robust to wind disturbances and thus can be used in real sailing conditions. It is proved by the computer simulations results and described in detail in this publication. Whole control system was designed and simulation studies were carried out on the basis of the real floating training ship model. A Model Predictive Controller synthesis steps, including linearization of the nonlinear ship model in the vicinity of operating point, are shown.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 39 (111); 107-115
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

A control Lyapunov function approach to adaptive control of HIV-1 infection

Autorzy:

Lemos, J. M.
Barao, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/229511.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

nonlinear adaptive control
HIV-1 infection
immunology
exact linearization
control Lyapunov function

Opis:

This paper presents an algorithm for nonlinear adaptive control of the viral load in HIV-1 infection. The infection model considered is a reduced complexity nonlinear state-space model with two state variables, that represent the plasma concentration of uninfected and infected CD4+ T-cells of the human immune system. The viral load is assumed to be proportional to the concentration of infected cells. First, a change of variables that exactly linearizes the system is obtained. For the resulting linear system the manipulated variable is obtained by state feedback. To compensate for the uncertainty in the infection parameter of the model an estimator based on a Control Lyapunov Function is designed.

Źródło:

Archives of Control Sciences; 2012, 22, 3; 273-284
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Contribution to random vibration numerical simulation and optimisation of nonlinear mechanical systems

Autorzy:

Sága, Milan
Vaško, Milan
Handrik, Marian
Kopas, Peter

Powiązania:

https://bibliotekanauki.pl/articles/947404.pdf

Data publikacji:

2019

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

statistical linearization
sensitivity analysis
structural optimisation
linearyzacja statystyczna
analiza wrażliwości
optymalizacja strukturalna

Opis:

This study considered the solution of the stochastic vibration of non-linear mechanical systems with Gaussian random excitations. It realised a short review of linearisations techniques in stochastic dynamics mainly with application in the area of truss finite element modelling. The presented method of statistical linearisation is applied to numerical testing. In the second part of the article, the sensitivity analysis of the first two stress statistical moments and structural weight minimising subjected to the random stress constrains presented by mean value and standard deviation was brought to the fore. Cross-sectional areas were used as optimising parameters.

Źródło:

Zeszyty Naukowe. Transport / Politechnika Śląska; 2019, 103; 143-154
0209-3324
2450-1549

Pojawia się w:

Zeszyty Naukowe. Transport / Politechnika Śląska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Application of poli-criterial linearization for control problem of stochastic dynamic systems
Zastosowanie wielokryterialnej linearyzacji w problemie sterowania stochastycznych nieliniowych układów dynamicznych

Autorzy:

Socha, L.

Powiązania:

https://bibliotekanauki.pl/articles/279864.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

Stochastic control of nonlinear systems
LQG control problem
stochastic linearization
Pareto optimal solution

Opis:

The problem of the determination of response characteristics and quasi-optimal control for nonlinear stochastic dynamic systems by using a multi-criteria linearization technique is presented in this paper. This idea was first introduced in previous author's paper (Socha, 1999a) for a simple dynamic system. In this paper, it is extended, and detailed analysis is given for a nonlinear oscillator with Gaussian external excitations and for a few criteria of statistical linearization. The obtained results are illustrated by a numerical example for Duffing's oscillator.
W pracy przedstawiono problem wyznaczania quasi-optymalnego sterowania w nieliniowych stochastycznych układach dynamicznych za pomocą wielokryterialnej metody linearyzacji stochastycznej. Pomysł wielokryterialnej linearyzacji został zasygnalizowany we wcześniejszej pracy autora (Socha, 1999a). W niniejszym artykule jest on rozwinięty i zastosowany do problemu sterowania, a szczegółowa analiza jest przeprowadzona dla nieliniowego oscylatora z addytywnym wymuszeniem Gaussa.

Źródło:

Journal of Theoretical and Applied Mechanics; 2005, 43, 3; 675-693
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

NTC thermistor nonlinearity compensation using Wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC

Autorzy:

Jovanović, Jelena
Denić, Dragan

Powiązania:

https://bibliotekanauki.pl/articles/1849001.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge

Opis:

NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.

Źródło:

Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

NTC thermistor nonlinearity compensation using wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC

Autorzy:

Jovanović, Jelena
Denić, Dragan

Powiązania:

https://bibliotekanauki.pl/articles/1849099.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge

Opis:

NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.

Źródło:

Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 32.

Tytuł:

NTC thermistor nonlinearity compensation using Wheatstone bridge and novel dual-stage single-flash piecewise-linear ADC

Autorzy:

Jovanović, Jelena
Denić, Dragan

Powiązania:

https://bibliotekanauki.pl/articles/1849139.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

comparator count
dual-stage linearization
flash ADC
NTC thermistor
measurement accuracy
Wheatstone bridge

Opis:

NTC thermistors are frequently used low in cost temperature sensors which provide some of the most desirable sensing features. However, due to the nonlinear static transfer function their sensitivity decreases with temperature increase, causing lower measurement accuracy in some regions of the measurement range. This paper proposes a method for NTC thermistor nonlinearity compensation using a Wheatstone bridge and a novel dual-stage single-flash piecewise-linear ADC. Both conversion stages are performed using the same flash ADC of a novel design based on a reduced number of comparators employed. In this manner, simpler design, lower production costs, higher compactness and lower power consumption of the linearizing ADC, are achieved. The proposed linearizing method is tested on the Vishay NTCLE413E2103F520L thermistor, in the range from 0°C to 100°C, and the obtained results confirmed the effectiveness of the method in measurement accuracy improvement: when the flash ADC of 10-bit resolution is employed the accuracy obtained is 7.4747 ·10-5°C.

Źródło:

Metrology and Measurement Systems; 2021, 28, 3; 523-537
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Numerical simulation of the micropolar fluid flow and heat transfer in a channel with a shrinking and a stationary wall

Autorzy:

Ali, K.
Ashraf, M.

Powiązania:

https://bibliotekanauki.pl/articles/949324.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

channel flow
shrinking/stationary walls
couple stress
quasi-linearization
Joule heating
viscous dissipation

Opis:

We present the numerical study of hydromagnetic (MHD) flow and heat transfer characte- ristics of a viscous incompressible electrically conducting micropolar fluid in a channel with one wall shrinking and the other at rest in the presence of a transverse applied magnetic field. Different from the classical shooting methodology, we employ a combination of a di- rect and an iterative method (SOR with optimal relaxation parameter) for solving the sparse systems of linear algebraic equations arising from the FD discretization of the linearized self similar nonlinear ODEs. Effects of some physical parameters on the flow and heat transfer are discussed and presented through tables and graphs. The present investigation may be beneficial to the flow and thermal control of polymeric processing.

Źródło:

Journal of Theoretical and Applied Mechanics; 2014, 52, 2; 557-569
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Linearyzacja dynamiki modeli Wienera- Hammersteina oraz upraszczanie nieliniowych modeli dynamiki torów pomiarowych dla sygnałów wejściowych wolnozmiennych
The Linearization of Dynamics of the Wiener-Hammmerstein Model and Simplification of Nonlinear Models of Measuring Systems for Slowly-Altering Signals

Autorzy:

Żuchowski, A

Powiązania:

https://bibliotekanauki.pl/articles/159075.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki

Tematy:

dynamika obiektów
modele nieliniowe
metody linearyzacji
methods of linearization
nonlinear models
dynamics of systems

Opis:

Wykorzystując modele zastępcze, uproszczone dla liniowych modeli dynamiki, tworzone przy wykorzystaniu rozwinięcia funkcji podcałkowej splotu w szereg Taylora, stosunkowo dokładne dla sygnałów wejściowych wolnozmniennych i gładkich można dokonać prostej, pełnej linearyzacji modelu Wienera-Hammersteina i takiego przekształcenia innych, wspomnianych modeli, które ułatwia interpretację zachowania się toru pomiarowego. W artykule przedstawiono odpowiednie zależności i wyniki symulowanych przykładów.
The simplified models of linear systems created by expanding of the integrand of convolution integral in Taylor's series are relatively accurate for slowly-altering, smooth input signals. Using this models one can do such linearization of the Wienner-Hammerstein model and the above-mentioned other type of models that interpretation of the operation of a measuring system is substantially facilitated. The referring dependences as well as exemplary results of simulations are presented in the paper.

Źródło:

Prace Instytutu Elektrotechniki; 2016, 272; 211-216
0032-6216

Pojawia się w:

Prace Instytutu Elektrotechniki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Control of a drone: study and analysis of the robustness

Autorzy:

Zemalache, K. M.
Beji, L.
Maaref, H.

Powiązania:

https://bibliotekanauki.pl/articles/384519.pdf

Data publikacji:

2008

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

self-tunable fuzzy interference system
static feedback linearization controller
tracking control
dynamic systems
drone

Opis:

The work describes an automatically on-line Self-Tunnable Fuzzy Interference Systems (STFIS) of a new configuration of mini-flying called XSF (X4 Stationary Flyer) drone. A Fuzzy controller based on-line optimization of a zero order Takagi-Sugeno fuzzy interference system (FIS) by a back propagation like algorithm is successfully applied. It is used to minimize a cost function that is made up of a quadratic error term and a weight decay term that prevents an excessive growth of parameters. Thus, we carried out control for helical trajectories by using the STFIS technique. This permits to prove the effectiveness of the proposed control law. Simulation results and a comparison with a Static Feedback Linearization controller (SFL) are presented and discussed. We studied the robustness of the two used controllers in the presence of disturbances. We presented the case of an engine breakdown as well as a gust of wind and taking into account white noise disturbances.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2008, 2, 1; 33-42
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 36.

Tytuł:

Positivity and linearization of a class of nonlinear continuous-time systems by state feedbacks

Autorzy:

Kaczorek, T.

Powiązania:

https://bibliotekanauki.pl/articles/329778.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

positive
nonlinear
continuous-time system
linearization
state feedback
układ dodatni
układ ciągły
sprzężenie zwrotne

Opis:

The positivity and linearization of a class of nonlinear continuous-time system by nonlinear state feedbacks are addressed. Necessary and sufficient conditions for the positivity of the class of nonlinear systems are established. A method for linearization of nonlinear systems by nonlinear state feedbacks is presented. It is shown that by a suitable choice of the state feedback it is possible to obtain an asymptotically stable and controllable linear system, and if the closed-loop system is positive then it is unstable.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2015, 25, 4; 827-831
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Linearization of the ship equations of motion

Autorzy:

Mielewczyk, A.

Powiązania:

https://bibliotekanauki.pl/articles/245238.pdf

Data publikacji:

2013

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

transport
mechanical engineering
Maritime Engineering
nonlinear differential equations
linearization
resistance of hull
error solutions

Opis:

In real systems are non-linear mathematical description. The exact solution can not be determined, and then look for approximate methods. Important is the type of nonlinearity, solutions and error method approximation. Linearization is an essential part of creating a model of the selected process. Ship resistance is a function of power with exponent two and higher. Model motion of the ship must have a solution in terms of maneuverability speed and speed of the sea. The solution must be well reproduce the actual path of the transition and the transition time of the ship. Nonlinear solution method determines the accuracy of the answers. Has presented the revised approach to solve the nonlinear differential equation of parabolic function. Linearization has been made in the selected range, and not where you want it to work and solve the error estimate. Range of solutions selected by external priorities adopted. Before the solution is estimated response error. The error value determines whether the selected interval will apply. If the problem solution is unacceptable, it will increase the accuracy of the result of the narrow scope of the work. The new scope of work should also be reassessed a solution error. This type of approach correlates with fuzzy logic, where we use the value of the Boolean variable with the function of belonging. The combination of classical methods of solving differential equations of the theory of fuzzy sets can bring new benefits. Such a solution must have the function of the accuracy of the answers. The linearization method meets this requirement.

Źródło:

Journal of KONES; 2013, 20, 2; 269-275
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Regulator odporny H2 w robocie mobilnym
Robust H2 controller in mobile robot

Autorzy:

Pyka, T.

Powiązania:

https://bibliotekanauki.pl/articles/275813.pdf

Data publikacji:

2012

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

robot mobilny
regulator odporny H2
linearyzacja
mobile robot
robust H2 control
linearization

Opis:

W artykule przedstawiono dwa typy regulatorów: klasyczny regulator PD oraz regulator odporny (ang. robust) H2, z uwzględnieniem wpływu zakłóceń. Dodatkowo przedstawiono wpływ poprawki regulatora odpornego na proces sterowania. Symulację przeprowadzono dla danych rzeczywistego silnika DC z przekładnią planetarną 1:20,25.
This article presents two kind of controllers: classical PD and robust H2, with impact of disturbances. Additionally the impact of robust to the control system was analyzed. The simulation was made for real engine with gear.

Źródło:

Pomiary Automatyka Robotyka; 2012, 16, 10; 74-78
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Fractional Order Sliding Mode Speed Control of Feedback Linearized Induction Motor

Autorzy:

Fetene, Yeshiwas
Shibeshi, Dereje

Powiązania:

https://bibliotekanauki.pl/articles/1193868.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

induction motor
input-output feedback
linearization
fractional-order sliding mode controller
SVPWM
load torque observer

Opis:

Induction machines have of late become the most popular workhorses in the industry replacing DC machines because of their advantages, such as reduced cost, reliability and the absence of commutators, which make them adapt to unfavourable conditions with lower maintenance requirement. However, higher-order models of AC machines, nonlinearities in model equations, uncertainties in parameters and load disturbances make induction motors difficult to control than that of DC motors. In this paper, a robust control strategy considering the recent advances in technology is proposed employing input-output feedback linearization for the exact decoupling of electromagnetic torque and rotor flux using fractional-order sliding mode controller (SMC) for the outer speed loop. The sliding mode observer is also designed to extract the rotor flux from the DC input voltage of the inverter and stator current measurements. Finally, a comparison between the commonly used proportional integral and derivative (PID) controller and the proposed fractional-order SMCs is made and the conclusion is reached.

Źródło:

Power Electronics and Drives; 2020, 5, 40; 109-122
2451-0262
2543-4292

Pojawia się w:

Power Electronics and Drives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Sterowanie zestawem artyleryjsko-rakietowym z wyko-rzystaniem zmodyfikowanego regulatora liniowo-kwadratowego
Control of missile-artillery system with modified linear-quadratic regulator

Autorzy:

Szmidt, P.
Koruba, Z.
Gapiński, D.

Powiązania:

https://bibliotekanauki.pl/articles/195194.pdf

Data publikacji:

2018

Wydawca:

Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza

Tematy:

sterowanie
LQR
regulator liniowo-kwadratowy
linearyzacja
obiekt nieliniowy
control
linear-quadratic regulator
linearization
nonlinear plant

Opis:

W niniejszej pracy przedstawiono opracowanie układu sterowania zdalnie sterowanym zestawem artyleryjsko-rakietowym z wykorzystaniem regulatora LQR (liniowo-kwadratowego). Model zestawu wyprowadzono, opierając się na produkowanym w Polsce zestawie ZU 23-2MR. W pracy omówiono linearyzację modelu matematycznego zestawu za pomocą Jakobianów, przedstawiono strukturę i budowę układu regulacji oraz zaproponowano sposób niwelacji uchybu sterowania w stanie ustalonym bez wykorzystania dodatkowych członów całkujących, występujących w układzie regulacji. Badaniom poddano także wpływ oddziaływania zakłóceń pochodzących od strzelającej armaty na dokładność sterowania w trakcie śledzenia manewrującego celu. Przeanalizowano również wpływ niedokładności identyfikacji parametrów obiektu sterowania na pracę układu. Symulacje numeryczne przeprowadzono z wykorzystaniem środowiska Scilab, a najistotniejsze wyniki zostały przedstawione w postaci graficznej.
This paper presents the development of a remote-controlled artillery-rocket control system using the LQR (linear-quadratic regulator). The system model was derived on the basis of the ZU 23-2MR set manufactured in Poland. The work discusses linearization of the mathematical model of the system with the help of Jacobians, presents the structure of the control system and proposes a method of minimizing the control error in the steady state, without the use of additional integrating elements occurring in the control system. The study also examined the impact of interference from a shooting cannon on the accuracy of control while tracking a maneuvering target. The influence of inaccurate identification of control object parameters on system operation was also analyzed. Numerical simulations were carried out using the Scilab environment, and the most important results were presented in the graphic form.

Źródło:

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2018, z. 90 [298], 2; 223-235
0209-2689
2300-5211

Pojawia się w:

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

A mathematical model for controlling a quadrotor UAV
Model matematyczny do sterowania czterowirnikowym BSP

Autorzy:

Kowalik, Rafał
Łusiak, Tomasz
Novak, Andrej

Powiązania:

https://bibliotekanauki.pl/articles/36444941.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

UAV control system
dynamics model
quadrotor
linearization
system kontroli BSP
model dynamiki
czterowimikowy BSP
linearyzacja

Opis:

Given the recent surge in interest in UAVs and their potential applications, a great deal of work has lately been done in the field of UAV control. However, UAVs belong to a class of nonlinear systems that are inherently difficult to control. In this study we devised a mathematical model for a PID (proportional integral derivative) control system, designed to control a quadrotor UAV so that it follows a predefined trajectory. After first describing quadrotor flight dynamics, we present the control model adopted in our system (developed in MATLAB Simulink). We then present simulated results for the use of the control system to move a quadrotor UAV to desired locations and along desired trajectories. Positive results of these simulation support the conclusion that a quadrotor UAV spatial orientation control system based on this model will successfully fulfil its task also in real conditions.
Wobec rosnącego zainteresowania bezzałogowymi statkami powietrznymi (BSP) i ich potencjalnymi zastosowaniami, w ostatnim czasie wykonano wiele prac w dziedzinie ich lepszego sterowania. BSP jednak należą do klasy nielinearnych systemów, które są z natury trudne do sterowania. W niniejszej pracy opracowano model matematyczny dla systemu sterowania opartego na metodzie PID (proportional integral derivative), zaprojektowanego do sterowania czterowirnikowym BSP tak, aby podążał on po wcześniej zdefiniowanej trajektorii. Opisano dynamiki lotu czterowirnikowym BSP i zaprezentowano model kontroli zastosowany w naszym systemie (opracowany w programie MATLAB Simulink). Przedstawione są wyniki symulacji użycia systemu do sterowania czterowirnikowym BSP w celu jego przemieszczenia się do pożądanej lokalizacji oraz wzdłuż pożądanej trajektorii. Wyniki tych symulacji potwierdzają wniosek, że oparty na tym modelu system sterowania dla czterowirnikowego BSP może z powodzeniem spełnić swoje zadanie również w warunkach rzeczywistych.

Źródło:

Transactions on Aerospace Research; 2021, 3 (264); 58-70
0509-6669
2545-2835

Pojawia się w:

Transactions on Aerospace Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Fuzzy feedback linearizing controller and its equivalence with the fuzzy nonlinear internal model control structure

Autorzy:

Boukezzoula, R.
Galichet, S.
Foulloy, L.

Powiązania:

https://bibliotekanauki.pl/articles/929632.pdf

Data publikacji:

2007

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie rozmyte
sterowanie odwrotne
sterowanie wewnętrzne
fuzzy control
inverse control
feedback linearization
internal model control

Opis:

This paper examines the inverse control problem of nonlinear systems with stable dynamics using a fuzzy modeling approach. Indeed, based on the ability of fuzzy systems to approximate any nonlinear mapping, the nonlinear system is represented by a Takagi-Sugeno (TS) fuzzy system, which is then inverted for designing a fuzzy controller. As an application of the proposed inverse control methodology, two popular control structures, namely, feedback linearization and Nonlinear Internal Model Control (NIMC) are investigated. Moreover, the paper points out that, under some conditions, both of the control structures are equivalent and naturally implement a Smith predictor in the presence of time delays.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2007, 17, 2; 233-248
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

A Novel Design Of An NTC Thermistor Linearization Circuit

Autorzy:

Lukić, J.
Denić, D.

Powiązania:

https://bibliotekanauki.pl/articles/221560.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

linearization
NTC thermistor
piecewise linear flash analog-to-digital converter
serial-parallel resistive voltage divider

Opis:

A novel design of a circuit used for NTC thermistor linearization is proposed. The novelty of the proposed design consists in a specific combination of two linearization circuits, a serial-parallel resistive voltage divider and a two-stage piecewise linear analog-to-digital converter. At the output of the first linearization circuit the quasi-linear voltage is obtained. To remove the residual voltage nonlinearity, the second linearization circuit, i.e., a two-stage piecewise linear analog-to-digital converter is employed. This circuit is composed of two flash analog-to-digital converters. The first analog-to-digital converter is piecewise linear and it is actually performing the linearization, while the second analog-to-digital converter is linear and it is performing the reduction of the quantization error introduced by the first converter. After the linearization is performed, the maximal absolute value of a difference between the measured and real temperatures is 0.014°C for the temperature range between - 25 and 75°C, and 0.001°C for the temperature range between 10 and 40°C.

Źródło:

Metrology and Measurement Systems; 2015, 22, 3; 351-362
0860-8229

Pojawia się w:

Metrology and Measurement Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Improved fuzzy feedback linearization and Sinswat-transformation control of inverted pendulum

Autorzy:

Chien, T. L.
Chen, C. C.
Chen, Y. C.
Wu, S. L.

Powiązania:

https://bibliotekanauki.pl/articles/970222.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

fuzzy logic control
almost disturbance decoupling
feedback linearization approach
composite Lyapunov approach
inverted pendulum control system

Opis:

This paper studies the output tracking and almost disturbance decoupling problem of nonlinear control systems with uncertainties via fuzzy logic control and feedback linearization approach. The main contribution of this study is to construct a controller, under appropriate conditions, such that the resulting closed-loop system enjoys for any initial condition and bounded tracking signal the following characteristics: input-to-state stability with respect to disturbance inputs and almost disturbance decoupling, i.e., the influence of disturbances on the L2 norm of the output tracking error can be arbitrarily attenuated by increasing some adjustable parameters. The underlying theoretical approaches are the differential geometry approach and the composite Lyapunov approach. One example, which cannot be solved by the approach from the first paper (Marino et al., 1989) on the almost disturbance decoupling problem, is proposed in this paper to exploit the fact that the almost disturbance decoupling and the convergence rate performances are easily achieved by virtue of our approach. In order to demonstrate the practical applicability, the paper takes up the study of an inverted pendulum control system.

Źródło:

Control and Cybernetics; 2010, 39, 4; 1069-1093
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

A differential geometric setting for dynamic equivalence and dynamic linearization

Autorzy:

Pomet, Jean-Baptiste

Powiązania:

https://bibliotekanauki.pl/articles/1359678.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

flat systems
infinite jet bundles
Dynamic feedback equivalence
dynamic feedback linearization
Lie-Bäcklund transformations
contact transformations

Opis:

This paper presents an (infinite-dimensional) geometric framework for control systems, based on infinite jet bundles, where a system is represented by a single vector field and dynamic equivalence (to be precise: equivalence by endogenous dynamic feedback) is conjugation by diffeomorphisms. These diffeomorphisms are very much related to Lie-Bäcklund transformations. It is proved in this framework that dynamic equivalence of single-input systems is the same as static equivalence.

Źródło:

Banach Center Publications; 1995, 32, 1; 319-339
0137-6934

Pojawia się w:

Banach Center Publications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Oligopolistic market: stability conditions of the equilibrium point of the generalized Cournot-Puu model

Autorzy:

Iwaszczuk, N.
Kavalets, I.

Powiązania:

https://bibliotekanauki.pl/articles/410692.pdf

Data publikacji:

2013

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

oligopoly
duopoly
generalized Cournot-Puu model
Cournot equilibrium
linearization of the system
stability
Routh-Hurwitz procedure

Opis:

The paper presents a model describing the behavior of participants of the oligopolistic market. Economic model of the oligopoly – a generalized Cournot-Puu model is constructed. Notion of Cournot equilibrium is introduced. Study on the stability of the equilibrium point of the constructed model is described. As an example, the model of duopoly is considered in detail.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 1; 15-22
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Semi-analytical treatment of complex nonlinear oscillations arising in the slider-crank mechanism

Autorzy:

Big-Alabo, Akuro
Ogbodo, Collins Onyinyechukwu
Ossia, Chinwuba Victor

Powiązania:

https://bibliotekanauki.pl/articles/1031444.pdf

Data publikacji:

2020

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Slider-crank mechanism
conservative system
continuous piecewise linearization method
non-natural system
nonlinear oscillation
periodic solution

Opis:

The model for the free nonlinear oscillation of the slider-crank mechanism is very complicated and difficult to solve accurately using most of the existing approximate analytical schemes. However, the continuous piecewise linearization method (CPLM), which is a recently proposed semi-analytical algorithm, is capable of producing simple and accurate periodic solutions for conservative systems irrespective of the complexity of the nonlinear restoring force. Hence, this study applied the CPLM to solve and analyze the complex nonlinear oscillations arising in the slider-crank mechanism. The CPLM results were verified using numerical solutions and it was found that the CPLM solution was accurate to less than 1.0% for angular amplitudes up to 165°. Analysis of the frequency-amplitude response revealed the existence of asymptotic behaviour as the ratio of the crank radius to the connecting rod length approaches zero or unity. Hence, oscillation models for the observed asymptotic responses were derived and found to be significantly simpler compared to the original oscillation model. Finally, analysis of the large-amplitude oscillations of the slider-crank mechanism revealed the presence of strong anharmonic response.

Źródło:

World Scientific News; 2020, 142; 1-24
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Automatic Control of Mechatronic Systems

Autorzy:

Schlacher, K.
Kugi, A.

Powiązania:

https://bibliotekanauki.pl/articles/908321.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

mechatronika
geometria różniczkowa
sterowanie
mechatronic systems
differential geometry
nonlinear H_{infty}-control
passivity
input-output linearization

Opis:

This contribution deals with different concepts of nonlinear control for mechatronic systems. Since most physical systems are nonlinear in nature, it is quite obvious that an improvement in the performance of the closed loop can often be achieved only by means of control techniques that take the essential nonlinearities into consideration. Nevertheless, it can be observed that industry often hesitates to implement these nonlinear controllers, despite all advantages existing from the theoretical point of view. On the basis of three different applications, a PWM-controlled dc-to-dc converter, namely the Cuk-converter, the problem of hydraulic gap control in steel rolling, and the design of smart structures with piezolelectric sensor and actuator layers, we will demonstrate how one can overcome these problems by exploiting the physical structure of the mathematical models of the considered plants.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2001, 11, 1; 131-164
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Modelling and control of an omnidirectional mobile manipulator

Autorzy:

Djebrani, S.
Benali, A.
Abdessemed, F.

Powiązania:

https://bibliotekanauki.pl/articles/330102.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

manipulator mobilny
sterowanie impedancyjne
logika rozmyta
holonome mobile manipulators
input state linearization
virtual impedance control
fuzzy logic

Opis:

A new approach to control an omnidirectional mobile manipulator is developed. The robot is considered to be an individual agent aimed at performing robotic tasks described in terms of a displacement and a force interaction with the environment. A reactive architecture and impedance control are used to ensure reliable task execution in response to environment stimuli. The mechanical structure of our holonomic mobile manipulator is built of two joint manipulators mounted on a holonomic vehicle. The vehicle is equipped with three driven axles with two spherical orthogonal wheels. Taking into account the dynamical interaction between the base and the manipulator, one can define the dynamics of the mobile manipulator and design a nonlinear controller using the input-state linearization method. The control structure of the robot is built in order to demonstrate the main capabilities regarding navigation and obstacle avoidance. Several simulations were conducted to prove the effectiveness of this approach.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 601-616
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Input constraints handling in an MPC/feedback linearization scheme

Autorzy:

Deng, J.
Becerra, V. M.
Stobart, R.

Powiązania:

https://bibliotekanauki.pl/articles/907653.pdf

Data publikacji:

2009

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

sterowanie predykcyjne
sterowanie odwrotne
sieć neuronowa
system nieliniowy
predictive control
feedback linearization
neural network
nonlinear system
constraints

Opis:

The combination of model predictive control based on linear models (MPC) with feedback linearization (FL) has attracted interest for a number of years, giving rise to MPC+FL control schemes. An important advantage of such schemes is that feedback linearizable plants can be controlled with a linear predictive controller with a fixed model. Handling input constraints within such schemes is difficult since simple bound contraints on the input become state dependent because of the nonlinear transformation introduced by feedback linearization. This paper introduces a technique for handling input constraints within a real timeMPC/FL scheme, where the plant model employed is a class of dynamic neural networks. The technique is based on a simple affine transformation of the feasible area. A simulated case study is presented to illustrate the use and benefits of the technique.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2009, 19, 2; 219-232
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

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