2021 |
Dadi, Leila; Ethabet, Haifa; Aoun, Mohamed Zonotope based Fault Tolerant Control for Discrete-Time Linear Time-Invariant Systems Conférence 2021, (Cited by: 1). Résumé | Liens | BibTeX | Étiquettes: Actuators, Control problems, Discrete time control systems, Discrete-time linear time-invariant systems, Estimation techniques, Fault tolerance, Faults tolerant controls, H ∞, H∞approach, Interval estimation, Invariance, Linear control systems, Linear time-invariant system, Observers designs, Time invariant systems, Time varying control systems, Zonotopes @conference{Dadi2021144b, This paper considers Faut Tolerant Control (FTC) problem for discrete-time Linear Time-Invariant systems (LTI) affected by faults on actuator. First, zonotope-based interval estimation technique is proposed, which integrate robust observer design with zonotopic analysis. By introducing H∞ performances in the observer design, the designed technique reduce the effects of uncertainties and improve the interval estimation accuracy. Based on the robust designed observer, the interval state estimation can be realized via a zonotopic analysis. Second, a FTC is designed to stabilize the close-loop system subject to actuator faults. The control law design is based on zonotopic technique, guaranteeing closed-loop stability. Simulation results are provided to illustrate the performance of the proposed method. © 2021 IEEE. |
Dadi, L.; Ethabet, H.; Aoun, M. Zonotope based Fault Tolerant Control for Discrete-Time Linear Time-Invariant Systems Conférence Institute of Electrical and Electronics Engineers Inc., 2021, ISBN: 9781665402705, (cited By 1). Résumé | Liens | BibTeX | Étiquettes: Actuators; Discrete time control systems; Fault tolerance; Invariance; Linear control systems; Linear time-invariant system, Control problems; Discrete-time linear time-invariant systems; Estimation techniques; Faults tolerant controls; H ∞; H∞approach; Interval estimation; Observers designs; Time invariant systems; Zonotopes, Time varying control systems @conference{Dadi2021144, This paper considers Faut Tolerant Control (FTC) problem for discrete-time Linear Time-Invariant systems (LTI) affected by faults on actuator. First, zonotope-based interval estimation technique is proposed, which integrate robust observer design with zonotopic analysis. By introducing H∞ performances in the observer design, the designed technique reduce the effects of uncertainties and improve the interval estimation accuracy. Based on the robust designed observer, the interval state estimation can be realized via a zonotopic analysis. Second, a FTC is designed to stabilize the close-loop system subject to actuator faults. The control law design is based on zonotopic technique, guaranteeing closed-loop stability. Simulation results are provided to illustrate the performance of the proposed method. © 2021 IEEE. |
2019 |
Najjar, A.; Amairi, M. Remote Supervision for Uncertain Network Controlled Systems in Set-membership Framework Conférence Institute of Electrical and Electronics Engineers Inc., 2019, ISBN: 9781728118208, (cited By 1). Résumé | Liens | BibTeX | Étiquettes: Interval estimation; Network-controlled; Network-induced delays; Remote supervision; state predictor; Time varying- delays; Uncertain delay; Unknown but bounded, Time varying control systems @conference{Najjar2019601, This paper is concerned with a remote supervision of a Network Controlled Systems (NCS) with uncertain time varying delays. New NCS model is presented considering network induced delays in both measurement and actuation channels. These delay functions are assumed to be unknown but bounded. To compensate this network imperfection, a state prediction technique is developed. The framework efficiency is demonstrated on numerical simulations. © 2019 IEEE. |
Najjar, A.; Amairi, M. Interval Observer Design for Network Controlled Systems Conférence Institute of Electrical and Electronics Engineers Inc., 2019, ISBN: 9781728113173, (cited By 2). Résumé | Liens | BibTeX | Étiquettes: External disturbances; Interval observers; Lower and upper bounds; Network-controlled; Prediction techniques; state predictor; Time varying- delays; Unknown but bounded, Linear networks; State estimation, Time varying control systems @conference{Najjar2019148, This paper concerns with state estimation of a Linear Network Controlled Systems (LNCS) subject to unknown but bounded external disturbances and uncertainties. A continuous interval observer is proposed to estimate lower and upper bounds of the unavailable states. To compensate the communication induced delay, a prediction technique is applied. The framework efficiency is demonstrated on numerical example of a LNCS. © 2019 IEEE. |
2017 |
Yakoub, Z.; Amairi, M.; Chetoui, M.; Saidi, B.; Aoun, M. Model-free adaptive fractional order control of stable linear time-varying systems Article de journal Dans: ISA Transactions, vol. 67, p. 193 – 207, 2017, (Cited by: 22). Résumé | Liens | BibTeX | Étiquettes: Adaptive control systems, Calculations, Controllers, Fractional calculus, Fractional order control, Fractional pid controllers, Frequency characteristic, Frequency domain analysis, Linear time-varying systems, Model-free adaptive control, Numerical methods, Numerical optimizations, Optimization, Robustness (control systems), Selective filtering, Three term control systems, Time varying control systems @article{Yakoub2017193b, This paper presents a new model-free adaptive fractional order control approach for linear time-varying systems. An online algorithm is proposed to determine some frequency characteristics using a selective filtering and to design a fractional PID controller based on the numerical optimization of the frequency-domain criterion. When the system parameters are time-varying, the controller is updated to keep the same desired performances. The main advantage of the proposed approach is that the controller design depends only on the measured input and output signals of the process. The effectiveness of the proposed method is assessed through a numerical example. © 2017 ISA |
Yakoub, Z.; Amairi, M.; Chetoui, M.; Saidi, B.; Aoun, M. Model-free adaptive fractional order control of stable linear time-varying systems Article de journal Dans: ISA Transactions, vol. 67, p. 193-207, 2017, ISSN: 00190578, (cited By 23). Résumé | Liens | BibTeX | Étiquettes: Adaptive control systems; Calculations; Controllers; Frequency domain analysis; Numerical methods; Optimization; Robustness (control systems); Three term control systems, Fractional calculus; Fractional order control; Fractional pid controllers; Frequency characteristic; Linear time-varying systems; Model-free adaptive control; Numerical optimizations; Selective filtering, Time varying control systems @article{Yakoub2017193, This paper presents a new model-free adaptive fractional order control approach for linear time-varying systems. An online algorithm is proposed to determine some frequency characteristics using a selective filtering and to design a fractional PID controller based on the numerical optimization of the frequency-domain criterion. When the system parameters are time-varying, the controller is updated to keep the same desired performances. The main advantage of the proposed approach is that the controller design depends only on the measured input and output signals of the process. The effectiveness of the proposed method is assessed through a numerical example. © 2017 ISA |
2015 |
Hmed, A. Ben; Amairi, M.; Aoun, M. Stabilizing fractional order controller design for first and second order systems Conférence 2015, (Cited by: 1). Résumé | Liens | BibTeX | Étiquettes: Analytic expressions, Calculations, Closed loop systems, Control, Controllers, DC motors, Electric machine control, Fractional calculus, Fractional-order controllers, Invariance, Linear systems, Linear time invariant systems, Numerical methods, Resonance, Second-order systemss, Stability regions, Stabilization, Stabilization problems, Time domain analysis, Time varying control systems, Time-domain specifications @conference{BenHmed2015c, The paper deals with the stabilization problem of the Linear Time Invariant system. In this work, we present a new method of stabilization addressed to the first and second order unstable system in order to guarantee the stability and the time domain performances. Analytic expressions are developed in the purpose of setting the stabilizing parameters of the controller by describing the stability region. Moreover, the time domain-curves of the desired closed-loop system are used to show time domain specifications. Finally, some numerical examples and a control of DC motor are proposed in order to show the benefits and the reliability of the new technique. © 2015 IEEE. |
Hmed, A. Ben; Amairi, M.; Aoun, M. Stabilizing fractional order controller design for first and second order systems Conférence 2015, (Cited by: 1). Résumé | Liens | BibTeX | Étiquettes: Analytic expressions, Calculations, Closed loop systems, Control, Controllers, DC motors, Electric machine control, Fractional calculus, Fractional-order controllers, Invariance, Linear systems, Linear time invariant systems, Numerical methods, Resonance, Second-order systemss, Stability regions, Stabilization, Stabilization problems, Time domain analysis, Time varying control systems, Time-domain specifications @conference{BenHmed2015e, The paper deals with the stabilization problem of the Linear Time Invariant system. In this work, we present a new method of stabilization addressed to the first and second order unstable system in order to guarantee the stability and the time domain performances. Analytic expressions are developed in the purpose of setting the stabilizing parameters of the controller by describing the stability region. Moreover, the time domain-curves of the desired closed-loop system are used to show time domain specifications. Finally, some numerical examples and a control of DC motor are proposed in order to show the benefits and the reliability of the new technique. © 2015 IEEE. |