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Wyświetlanie 1-15 z 164
Tytuł:
Comparison of four state observer design algorithms for MIMO system
Autorzy:
Vinodh, K. E.
Jovitha, J
Ayyappan, S.
Powiązania:
https://bibliotekanauki.pl/articles/229209.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
luenberger observer
Kalman observer
unknown input observer
sliding mode observer
Opis:
A state observer is a system that models a real system in order to provide an estimate of the internal state of the system. The design techniques and comparison of four different types of state observers are presented in this paper. The considered observers include Luenberger observer, Kalman observer, unknown input observer and sliding mode observer. The application of these observers to a Multiple Input Multiple Output (MIMO) DC servo motor model and the performance of observers is assessed. In order to evaluate the effectiveness of these schemes, the simulated results on the position of DC servo motor in terms of residuals including white noise disturbance and additive faults are compared.
Źródło:
Archives of Control Sciences; 2013, 23, 2; 243-256
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-layer observer as new structure for state estimation in linear systems
Autorzy:
Bernat, J.
Kołota, J.
Superczyńska, P.
Stępień, S.
Powiązania:
https://bibliotekanauki.pl/articles/140374.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Luenberger observer
Multi Observer
electric DC motor
Opis:
A new structure to design observers for linear systems is presented in this work. The key step is the construction of two layers where the first consists of multiple observers and the second connects them providing the weighted estimation state. The main difficulty is to find a new feedback which is responsible for control weights. To define observation law, we rely on multi observers from the first layer. The proposed structure significantly improves the transient characteristics of the observation process, which is shown in illustrative examples.
Źródło:
Archives of Electrical Engineering; 2017, 66, 3; 507-521
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of viewing conditions on cross-media color matching
Autorzy:
Huang, Min
He, Ruili
Guo, Chunli
Shi, Chunjie
Cui, Guihua
Luo, Ming Ronnier
Melgosa, Manuel
Powiązania:
https://bibliotekanauki.pl/articles/173710.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
observer variability
observer metamerism
cross-media color experiment
color matching
Opis:
We investigated observer metamerism under a variety of viewing conditions, in a set of color-matching experiments using displays and printed color samples under specific light sources. A selection was made of light sources with different illuminances, spectral power distributions, and correlated color temperatures, as well as displays with different sets of primaries. A panel of 157 observers with normal color vision and ages between 20 and 59 years old performed 5465 visual color matches around 9 different color centers. The results from the simulated and real experiments were quite different. Specifically, the mean color difference from the mean changed with experimental viewing conditions, ranging from 0.73 to 1.64 CIELAB units (average 0.99 CIELAB units) in simulated experiments, and from 3.12 to 4.03 CIELAB units (average 3.55 CIELAB units) in real experiments. In real experiments, observers’ variability reduced for light sources with high illuminance and high correlated color temperature. Spectral power distributions affected observer metamerism, but the role played by the primaries of the two displays employed was unclear.
Źródło:
Optica Applicata; 2019, 49, 4; 627-640
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Real-time implementation of an interconnected observer design for p-cells chopper
Autorzy:
Laidi, K.
Benmansour, K.
Ferdjouni, A.
Bouchhida, O.
Powiązania:
https://bibliotekanauki.pl/articles/141378.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
obserwator
switching modes
zasilanie
p-cell chopper
observer design
interconnected observer
Opis:
This paper deals with an observer design for a p-cell chopper. The goal is to reduce drastically the number of sensors in such system by using an observer in order to estimate all the capacitor voltages. Furthermore, considering an instantaneous model of a p-cell chopper, an interconnected observer is designed in order to estimate the capacitor voltages. This is realized by using only the load current measurement. Simulation results are given in order to illustrate the performance of such observer. To demonstrate the validity of our approach, experimental results based on Digital Signal Processor (DSP) are presented.
Źródło:
Archives of Electrical Engineering; 2010, 59, 1-2; 5-20
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An interval observer design for uncertain nonlinear systems based on the T-S fuzzy model
Autorzy:
Menasria, Y.
Bouras, H.
Debbache, N.
Powiązania:
https://bibliotekanauki.pl/articles/229225.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
T-Smodel
T-S proportional observer
interval observer
time-varying systems
Opis:
A new approach to build an interval observer for nonlinear un certain systems is presented in this paper. Nonlinear systems modeled in the Takagi-Suge no (T-S) form are studied. A T-S proportional observer is first issued by pole-placement and LMI tools. Secondly, time-varying change of coordinates for each dynamic state estimation error is used to design an interval observer. The system state bounds are then directly deduced.
Źródło:
Archives of Control Sciences; 2017, 27, 3; 397-407
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis and design of state estimated controller for delay fuzzy systems with parameter
Autorzy:
Hadj Taieb, Nizar
Hammami, Mohamed Ali
Delmotte, François
Powiązania:
https://bibliotekanauki.pl/articles/2175116.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
time-delay systems
observer
stabilization
Opis:
This paper deals with the problem of stabilization by an estimated state feedback for a family of nonlinear time-delay Takagi-Sugeno fuzzy parameterized systems. The delay is supposed to be constant where the parameter-dependent controls laws are used to compensate the nonlinearities which are formulated in terms of linear matrix inequalities (LMIs). Based on the Lyapunov-Krasovskii functionals, global exponential stability of the closed-loop systems is achieved. The controller and observer gains are able to be separately designed even in the presence of modeling uncertainty and state delay. Finally, a numerical example is given to show the applicability of the main result.
Źródło:
Archives of Control Sciences; 2022, 32, 4; 709--731
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive observer-based fault estimation for a class of Lipschitz nonlinear systems
Autorzy:
Oucief, N.
Tadjine, M.
Labiod, S.
Powiązania:
https://bibliotekanauki.pl/articles/229517.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear adaptive observer
fault estimation
strictly positive real
Lipschitz systems
observer matching condition
LMI
Opis:
Fault input channels represent a major challenge for observer design for fault estimation. Most works in this field assume that faults enter in such a way that the transfer functions between these faults and a number of measured outputs are strictly positive real (SPR), that is, the observer matching condition is satisfied. This paper presents a systematic approach to adaptive observer design for joint estimation of the state and faults when the SPR requirement is not verified. The proposed method deals with a class of Lipschitz nonlinear systems subjected to piecewise constant multiplicative faults. The novelty of the proposed approach is that it uses a rank condition similar to the observer matching condition to construct the adaptation law used to obtain fault estimates. The problem of finding the adaptive observer matrices is formulated as a Linear Matrix Inequality (LMI) optimization problem. The proposed scheme is tested on the nonlinear model of a single link flexible joint robot system.
Źródło:
Archives of Control Sciences; 2016, 26, 2; 245-259
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-proportional full-order Luenberger observers of induction motors
Autorzy:
Białoń, T.
Lewicki, A.
Pasko, M.
Niestrój, R.
Powiązania:
https://bibliotekanauki.pl/articles/141473.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Luenberger observer
induction motor
pole placement
Opis:
The paper recapitulates recently conducted investigations of non-proportional Luenberger observers, applied to reconstruction of state variables of induction motors. Three structures of non-proportional observers are analyzed, a proportional-integral observer, modified integral observer and observer with integrators. Criteria for gain selection of the observer are described, classical ones based on poles, as well as additional, increasing observer’s robustness. Fulfilment of the presented criteria can be ensured with the three proposed methods for gain selection, two analytical, based on dyadic transformation and one based on optimization.
Źródło:
Archives of Electrical Engineering; 2018, 67, 4; 925-937
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the state estimation for nonlinear continuous-time fuzzy systems
Autorzy:
Delmotte, Francois
Hammami, Mohamed Ali
Rettab, Nour El Houda
Powiązania:
https://bibliotekanauki.pl/articles/2106502.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy systems
Lipschitz analysis
observer design
Opis:
A large class of nonlinear systems can be represented or well approximated by Takagi-Sugeno (TS) fuzzy models, which in theory can approximate a general nonlinear system to an arbitrary degree of accuracy. The TS fuzzy model consists of a fuzzy rule base. The rule antecedents partition a given subspace of the model variables into fuzzy regions, while the consequent of each rule is usually a linear or affine model, valid locally in the corresponding region. In this paper, the observer design problem for a T-S fuzzy system subject to Lypschitz perturbation is investigated. First, an observer of Kalman type is designed to estimate the unknown system states. Then, the class of one-sided Lipschitz for a TS fuzzy system subject to a sufficient condition on the bound is studied. The challenges are discussed and some analysis oriented tools are provided. An example is given to show the applicability of the main result.
Źródło:
Archives of Control Sciences; 2022, 32, 1; 57--72
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control system design for dynamic positioning using vectorial backstepping
Autorzy:
Witkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/359838.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
dynamic positioning
backstepping
nonlinear passive observer
Opis:
The problem of synthesis a dynamic positioning system for low frequency model of surface vessel was considered in this paper. The recursive vectorial backstepping control design was used to keep a fixed position and heading in presence of wave disturbances. The passive observer was introduced to smooth the measurements and to estimate the velocities needed for the control algorithm. The computer simulation results were given to demonstrate the effectiveness of that combination of controller-observer system to compensate environmental disturbances.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 36 (108) z. 1; 182-187
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two Observer-Based Tracking Algorithms for a Unicycle Mobile Robot
Autorzy:
Jakubiak, J.
Lefeber, E.
Tchoń, K.
Nijmeijer, H.
Powiązania:
https://bibliotekanauki.pl/articles/908499.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
robotyka
observer
trajectory tracking
mobile robot
Opis:
A trajectory tracking problem for the three-dimensional kinematic model of a unicycle-type mobile robot is considered. It is assumed that only two of the tracking error coordinates are measurable. By means of cascaded systems theory we develop observers for each of the error coordinates and show the K-exponential convergence of the tracking error in combined closed-loop observer-controller systems. The results are illustrated with computer simulations.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2002, 12, 4; 513-522
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of Observer-Based Fault Detection Structure for Unknown Systems using Input–Output Measurements: Practical Application to BLDC Drive
Autorzy:
Eissa, M. Abdullah
Darwish, R. R.
Bassiuny, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/1193710.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fault
sensor
measurements
observer
BLDC motor
Opis:
Industrial systems serve us in all areas of life. Faults may result in economic loss and wasting energy. Detecting the onset of faults, and determining their location are important engineering tasks. An important class of fault detection (FD) and diagnosis methods utilizes the mathematical model of the monitored system. But, the parameters required for mathematical modelling are limited or unavailable for the most real industrial engineering applications. Observer-based FD is one of the main approaches to FD and identification. At the same time, the traditional observer’s gain calculation required system model parameters. So, this article presents the design of a novel observer for FD purposes using the input–output measurements of the system with unknown parameters. This proposed observer’s design considers observer’s gain tuning, regardless of the mathematical representation of the plant. This the new feature that distinction our observer will facilitate the implementation of FD systems for many unknown parameters industrial systems. The effectiveness of the proposed observer is verified by experimental application to BLDC motor and compared with classical Luenberger observer. The experimental and comparison results prove feasibility and effectiveness of the proposed observer for FD purposes.
Źródło:
Power Electronics and Drives; 2019, 4, 39; 215-224
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An exponential observer and a controller for a class of nonlinear systems
Autorzy:
Hammami, M. A.
Zribi, M
Kallel, J
Powiązania:
https://bibliotekanauki.pl/articles/229713.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear system
observer
stability
controller
stabilization
Opis:
In this paper, we study the observer design problem for a class of nonlinear systems. Specifically, we design an exponential observer for a separately excited DC motor. Moreover, a stabilizing controller is designed for the system to ensure the exponential stability of the solutions toward their desired values. Simulations results show that proposed observer is able to reconstruct the states of the system. In addition, the simulation results indicate that the designed controller works well.
Źródło:
Archives of Control Sciences; 2013, 23, 1; 79-92
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optymalizacja wzmocnienia obserwatora Luenbergera w układzie predykcyjnego sterowania systemem aktywnego zawieszenia
Luenberger Observer Gain Optimization in Model Predictive Control System for Car Active Suspension
Autorzy:
Maślak, Grzegorz
Orłowski, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/2068639.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
obserwator stanu
sterowanie predykcyjne
optymalizacja obserwatora
zawieszenie aktywne
state observer
model predictive control
observer optimization
active suspension
Opis:
Układy sterowania wykorzystujące regulatory predykcyjne bardzo często wymagają wprowadzenia do ich struktury mechanizmów umożliwiających estymację niedostępnego pomiarowo stanu obiektu. Zależnie od przypadku nieosiągalne mogą być informacje o różnej liczbie zmiennych stanu. Szeroko stosowanymi układami pozwalającymi na uzyskanie niezbędnych informacji o stanie obiektu są obserwator Luenbergera oraz różnego typu filtry Kalmana. Autorzy proponują metodę syntezy obserwatora Luenbergera opartą na optymalizacji wzmocnienia owego obserwatora, przy czym wyznacznik jakości uzyskanego wzmocnienia wykorzystywanego przez optymalizator stanowi ogólna jakość regulacji układu sterowania z regulatorem predykcyjnym. Opracowana metoda pozwala na uzyskanie, z punktu widzenia przyjętego kryterium, obserwatora o właściwościach lepszych niż analogiczny układ, którego syntezę przeprowadzono przy wykorzystaniu równania Sylvestera oraz klasycznego filtru Kalmana, mimo występowania zakłóceń. Metoda zaprezentowana zostanie na przykładzie układu predykcyjnego sterowania systemem aktywnego zawieszenia.
MPC Driven control systems very often are requiring the introduction of a mechanism predicting the state of the object unavailable for measurements. Depending on the case, a different number of state variables will be unobtainable. Widely used systems to obtain essential data of the condition of an object are Luenberger state observer and different types of Kalman filters. The authors propose a new method of Luenberger observer synthesis based on Luenberger gain optimization using performance index corresponding to generalized system performance. The developed method allows us to obtain better-performing observer from the point of view of the adopted criterion, compared to similar estimators derived from the Sylvester equation and classic Kalman filters, even despite the occurrence of disturbances. The developed method will be presented on an example of an active suspension system with MPC.
Źródło:
Pomiary Automatyka Robotyka; 2021, 25, 2; 5--10
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PI observer stability and application in an induction motor control system
Autorzy:
Białoń, T.
Lewicki, A.
Pasko, M.
Niestrój, R.
Powiązania:
https://bibliotekanauki.pl/articles/200301.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
luenberger observer
induction motor
multiscalar control system
Opis:
The paper discusses the problem of stability of a proportional-integral Luenberger observer, designated for the state variables reconstruction of a linear, time-invariant dynamical system. It is proven, that there exists such a class of observed systems, for which the observer is always unstable, independently of its gains. Stability can be provided in every possible case after application of proposed modifications to the structure of the observer. It is proven, that stability of the modified observer depends only on its gains. It is shown, that an induction motor is the exemplary observed system, for which application of the unmodified observer is impossible due to its lack of stability, while the modified observer provides proper operation of the control system. Finally, some experimental results are presented, obtained in the multiscalar control system of the induction motor, equipped with the modified proportional-integral observer.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 595-598
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 164

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