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Wyświetlanie 1-15 z 56
Tytuł:
Feedback Stabilization of Continuous Systems by Adding an Integrator
Autorzy:
Outbib, R.
Aggoune, W.
Powiązania:
https://bibliotekanauki.pl/articles/908264.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
feedback stabilization
nonlinear systems
continuous systems
Lyapunov function
Opis:
This note is devoted to the problem of global stabilization of continuous systems by adding an integrator. The goal is to prove that if a continuous non-linear system dot x =f(x,u) is globally asymptotically stable at the origin for u equiv 0, then the augmented system obtained by adding an integrator is stabilizable by means of a continuous feedback.
Źródło:
International Journal of Applied Mathematics and Computer Science; 1999, 9, 4; 871-881
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic analysis of torsional discrete-continuous systems with position-dependent variable inertia
Autorzy:
Pielorz, A.
Powiązania:
https://bibliotekanauki.pl/articles/279507.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
variable inertia
discrete-continuous systems
wave approach
Opis:
In the paper, dynamic investigations of multi-mass discrete-continuous systems torsionally deformed are performed taking into account the position-dependent mass moment of inertia of one of rigid bodies. It is assumed that the rigid body representing a motor moves with a variable velocity. An originally nonlinear problem is linearized, and the wave approach leading to solving equations with a retarded argument having variable coefficients is used for the solution. Exemplary numerical calculations are done for a three-mass system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 1; 107-115
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the control of the final speed for a class of finite-dimensional linear systems: controllability and regulation
Autorzy:
Rachik, Mostafa
Khaloufi, Issam
Benfatah, Youssef
Boutayeb, Hamza
Laarabi, Hassan
Powiązania:
https://bibliotekanauki.pl/articles/29432204.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
speed-controllability
controllability
continuous systems
regulation
Kalman’s condition
Opis:
In this article, we extended the concept of controllability, traditionally used to control the final state of a system, to the exact control of its final speed. Inspired by Kalman’s theory, we have established some conditions to characterize the control that allows the system to reach a desired final speed exactly. When the assumptions ensuring speed-controllability are not met, we adopt a regulation strategy that involves determining the control law to make the system’s final speed approach as closely as possible to the predefined final speed, and this at a lower cost. The theoretical results obtained are illustrated through three examples.
Źródło:
Archives of Control Sciences; 2023, 33, 3; 497--525
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of agent cooperation by means of DES supervision to manufacturing system
Autorzy:
Čapkovič, F.
Powiązania:
https://bibliotekanauki.pl/articles/229948.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
agents
control
cooperation
discrete event systems
continuous systems
hybrid Petri nets
supervisor
synthesis
Opis:
The supervision of complex manufacturing systems is handled in this paper. Production lines of manufacturing systems are understood here to be hybrid agents. Such an agent expresses continuous material flow together with a set of imperative discrete operations. In other words, the hybrid agent makes a cooperation of continuous and discrete event devices possible. The results are applied to complex continuous manufacturing system. First Order Hybrid Petri Nets (FOHPN) are utilized in order to model the elementary autonomous hybrid agents. The cooperation of hybrid agents is based on the DES (discrete-event systems) control theory. It is realized by means of DES supervision methods and the agent negotiation is based on place/transition Petri nets (P/T PN). The proposed approach is illustrated in details on the cooperation of hybrid production lines in the real complex manufacturing systems recycling waste plastics into plastic bags. The usefulness and applicability of the approach consists especially in the fact that the procedures in analytical terms can be employed. In such a way the approach turns lucid also in complicated cases.
Źródło:
Archives of Control Sciences; 2011, 21, 4; 395-417
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On parametric Hurwitz stability margin of real polynomials
Autorzy:
Husek, P.
Powiązania:
https://bibliotekanauki.pl/articles/1839184.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
robust stability
parametric uncertainty
continuous-time systems
Opis:
The paper deals with the problem of determining Hurwitz stability of a ball of polynomials defined by a weighted lp norm in the coefficient space where p is an arbitrary positive integer including infinity. The solution of the case when the weights are supposed to be the same for coefficient being above and below its nominal value corresponding to symmetric ball has been given by Tsypkin and Polyak. However, sometimes it seems to be useful to have a possibility to consider these weights as different, resulting in the asymmetric ball. This is, for example, the situation where the weights express our level of confidence that the real value of a coefficient lies in some interval. Such approach is used if the value of a coefficient is estimated by an expert. Solution of the problem is based on frequency domain plot in the complex plane and on applying the Zero Exclusion Theorem. The main idea consists in separation of the original problem into four subproblems and using an appropriate coordinate transformation which makes the value set independent of frequency. This transformation makes it possible to move the relative value set into the origin of the complex plane and to easily formulate the necessary and sufficient condition of Hurwitz stability of asymmetric ball of polynomials with prescribed radius or determine the maximum radius preserving stability. The whole graphical procedure consists of four plots instead of one, needed in the symmetric case.
Źródło:
Control and Cybernetics; 2008, 37, 3; 549-563
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regular design equations for the continuous reduced-order Kalman filter
Autorzy:
Hippe, P.
Powiązania:
https://bibliotekanauki.pl/articles/229993.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optimal estimation
polynomials
multivariable systems
continuous-time systems
Opis:
Reduced-order Kalman filters yield an optimal state estimate for linear dynamical systems, where parts of the output are not corrupted by noise. The design of such filters can either be carried out in the time domain or in the frequency domain. Different from the full-order case where all measurements are noisy, the design equations of the reduced-order filter are not regular. This is due to the rank deficient measurement covariance matrix and it can cause problems when using standard software for the solution of the Riccati equations in the time domain. In the frequency domain the spectral factorization of the non-regular polynomial matrix equation does not cause problems. However, the known proof of optimality of the factorization result also requires a regular measurement covariance matrix. This paper presents regular (reduced-order) design equations for reduced-order Kalman filters in the time and in the frequency domains for linear continuous-time systems. They allow to use standard software for the design of the filter, to formulate the conditions for the stability of the filter and they also prove that the existing frequency domain solutions obtained by spectral factorization of a non-regular polynomial matrix equation are indeed optimal.
Źródło:
Archives of Control Sciences; 2011, 21, 4; 349-361
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of The Second Fornasini-Marchesini Type Model of Continuous-Discrete Linear Systems
Autorzy:
Busłowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/387308.pdf
Data publikacji:
2011
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
system liniowy
stabilność
continuous-time systems
stability
Opis:
The problem of asymptotic stability of continuous-discrete linear systems is considered. Simple necessary conditions and two computer methods for investigation of asymptotic stability of the second Fornasini-Marchesini type model are given. The first method requires computation of the eigenvalue-loci of complex matrices, the second method requires computation of determinants of some matrices. Effectiveness of the methods is demonstrated on numerical example.
Źródło:
Acta Mechanica et Automatica; 2011, 5, 4; 17-21
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Realization problem for singular positive single-input single-output continuous-time systems with delays in state and in inputs
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/387192.pdf
Data publikacji:
2008
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
sterowanie
systemy liniowe
controllability
linear systems
continuous-time systems
Opis:
The positive realization problem for singular continuous-time linear single-input single-output systems with delays in state and in inputs is addressed. The notion of canonical forms of matrices are extended for singular linear systems with delays. Necessary and sufficient conditions for positivity of the singular continuous-time systems with delays and sufficient conditions for the existence of a positive singular realization are established. A procedure for computation of a positive singular realization of a given transfer function is proposed and illustrated by a numerical example.
Źródło:
Acta Mechanica et Automatica; 2008, 2, 2; 45-50
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Względna sterowalność dodatnich układów ciągło-dyskretnych
Relative controllability of positive continuous-discrete time systems
Autorzy:
Trzasko, W.
Powiązania:
https://bibliotekanauki.pl/articles/275541.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
układy ciągło-dyskretne
sterowalność
continuous-discrete systems
controllability
Opis:
W pracy rozpatrzono problem sterowalności dodatnich liniowych dwuwymiarowych układów ciągło-dyskretnych. Sformułowano definicje oraz podano warunki konieczne i wystarczające sterowalności do zera oraz względnej sterowalności. Rozważania zilustrowano przykładem.
In the paper the controllability of the linear 2D positive continuous-discrete time systems are considered. The definitions of null controllability and relative controllability are introduced and necessary and sufficient conditions are given. The considerations are illustrated by numerical example.
Źródło:
Pomiary Automatyka Robotyka; 2010, 14, 2; 481-491
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Odporna stabilność układów ciągło-dyskretnych o funkcji charakterystycznej zależnej liniowo od niepewnych parametrów
Robust stability of continuous-discrete systems with characteristic function linearly dependent on uncertain parameters
Autorzy:
Busłowicz, M.
Sokólski, M.
Powiązania:
https://bibliotekanauki.pl/articles/275478.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
układy ciągło-dyskretne
stabilność
continuous-discrete systems
stability
Opis:
Rozpatrzono problem badania odpornej stabilności liniowego układu hybrydowego ciągło-dyskretnego, którego wielomian charakterystyczny dwóch zmiennych zależy liniowo od niepewnych parametrów. Pokazano, że do badania odpornej stabilności takich układów można stosować twierdzenie krawędziowe, znane z teorii odpornej stabilności rodzin wielomianów charakterystycznych jednej zmiennej. Podano komputerową metodę służącą do sprawdzania warunków tego twierdzenia. Rozważania zilustrowano przykładem.
The problem of robust stability of linear continuous-discrete systems with characteristic polynomial (in two independent variables) linearly dependent on uncertain parameters is considered. It is show that the Edge Theorem known from the theory of robust stability of families of polynomials in one variable can applied to robust stability checking of the systems. Computer methods for checking of the conditions of this theorem are given. The considerations are illustrated by numerical example.
Źródło:
Pomiary Automatyka Robotyka; 2010, 14, 2; 416-425
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of approximation methods of positive stable continuous-time linear systems by positive stable discrete-time systems
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/377291.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
continuous-time linear systems
discrete-time linear systems
Opis:
The positive asymptotically stable continuous-time linear systems are approximated by corresponding asymptotically stable discrete-time linear systems. Two methods of the approximation are presented and the comparison of the methods is addressed. The considerations are illustrated by three numerical examples and an example of positive electrical circuit.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 73; 9-20
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of continuous-discrete linear systems described by the general model
Autorzy:
Kaczorek, T.
Powiązania:
https://bibliotekanauki.pl/articles/202283.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stability
continuous-discrete linear systems
general model
Opis:
New necessary and sufficient conditions for asymptotic stability of positive continuous-discrete linear systems described by the general 2D model are established. A procedure for checking the asymptotic stability is proposed. The effectiveness of the procedure is demonstrated on examples.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 2; 189-193
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An improvement of Gamma approximation for reduction of continuous interval systems
Autorzy:
Bokam, Jagadish Kumar
Singh, Vinay Pratap
Devarapalli, Ramesh
García Márquez, Fausto Pedro
Powiązania:
https://bibliotekanauki.pl/articles/1409387.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
continuous interval systems
Kharitonov polynomials
Routh approximation
modelling
SISO systems
MIMO systems
Opis:
In recent, modeling practical systems as interval systems is gaining more attention of control researchers due to various advantages of interval systems. This research work presents a new approach for reducing the high-order continuous interval system (HOCIS) utilizing improved Gamma approximation. The denominator polynomial of reduced-order continuous interval model (ROCIM) is obtained using modified Routh table, while the numerator polynomial is derived using Gamma parameters. The distinctive features of this approach are: (i) It always generates a stable model for stable HOCIS in contrast to other recent existing techniques; (ii) It always produces interval models for interval systems in contrast to other relevant methods, and, (iii) The proposed technique can be applied to any system in opposite to some existing techniques which are applicable to second-order and third-order systems only. The accuracy and effectiveness of the proposed method are demonstrated by considering test cases of single-inputsingle-output (SISO) and multi-input-multi-output (MIMO) continuous interval systems. The robust stability analysis for ROCIM is also presented to support the effectiveness of proposed technique.
Źródło:
Archives of Control Sciences; 2021, 31, 2; 347-373
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of State-Space Models of Linear Continuous-Time Fractional Order Systems
Autorzy:
Busłowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/387233.pdf
Data publikacji:
2011
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
stabilność
model
symulacja komputerowa
stability
continuous-time systems
computer simulation
Opis:
The paper considers the stability problem of linear time-invariant continuous-time systems of fractional order, standard and positive, described by the state space model. Review of previous results is given and some new methods for stability checking are presented. Considerations are illustrated by numerical examples and results of computer simulations.
Źródło:
Acta Mechanica et Automatica; 2011, 5, 2; 15-22
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerically Stable and Efficient Implementation of a Continuous-Discrete Multiple-Model Estimator
Autorzy:
Sankowski, M.
Buda, W.
Powiązania:
https://bibliotekanauki.pl/articles/226632.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radar tracking
continuous-time systems
nonlinear filtering
numerical complexity
implementation
Opis:
This paper deals with the problem of implementing adaptive radar tracking filters based on continuous-time models of target motion and on discrete-time models of measurement process. The particular difficulties addressed include: nonlinear and non-stationary target movement models with uncertain parameters, and low data rate due to a rotating radar antenna. The proposed tracking filter relies basically on the continuous-discrete variant of the extended Kalman filter (EKF), the probabilistic data association (PDA) technique and the interacting multiplemodel (IMM) state estimation scheme. Numerical properties of the algorithm are discussed and a software implementation is developed using the open-source BLAS library. Several design concepts are combined to assure numerical stability, convergence and efficiency of the estimator.
Źródło:
International Journal of Electronics and Telecommunications; 2013, 59, 4; 369-374
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 56

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