2020 |
Ethabet, H.; Raïssi, T.; Amairi, M.; Combastel, C.; Aoun, M. Interval observer design for continuous-time switched systems under known switching and unknown inputs Article de journal Dans: International Journal of Control, vol. 93, no. 5, p. 1088 – 1101, 2020, (Cited by: 12). Résumé | Liens | BibTeX | Étiquettes: Continuous time systems, Interval estimation, Linear systems, Lower and upper bounds, State transformation, Switched linear system, Switched system, Unknown but bounded, Unknown input estimation, Unknown inputs @article{Ethabet20201088b, This paper deals with unknown input estimation for switched linear systems in an unknown but bounded error (UBBE) framework. Based on a known switching signal and under the fulfilment of the relative degree property by all the subsystems, a decoupling method is used to make the state partially affected by the unknown input. Assuming that the disturbances and the measurement noises are unknown but bounded with a priori known bounds, lower and upper bounds of the unmeasured state and unknown input are then computed. A numerical example illustrates the efficiency of the proposed methodology. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group. |
2018 |
Lamouchi, Rihab; Raïssi, Tarek; Amairi, Messaoud; Aoun, Mohamed Interval Observer Design for Actuator Fault Estimation of Linear Parameter-Varying Systems Conférence vol. 51, no. 24, 2018, (Cited by: 5; All Open Access, Bronze Open Access, Green Open Access). Résumé | Liens | BibTeX | Étiquettes: Actuators, Discrete time linear parameter varying (LPV) system, External disturbances, Fault estimation, Interval observers, Linear parameter varying systems, Linear systems, Lower and upper bounds, LPV systems, Parameter estimation, Unknown input observer @conference{Lamouchi20181199b, This work is devoted to fault estimation of discrete-time Linear Parameter-Varying (LPV) systems subject to actuator additive faults and external disturbances. Under the assumption that the measurement noises and the disturbances are unknown but bounded, an interval observer is designed, based on decoupling the fault effect, to compute a lower and upper bounds for the unmeasured state and the faults. Stability conditions are expressed in terms of matrices inequalities. A case study is used to illustrate the effectiveness of the proposed approach. © 2018 |
2017 |
Yousfi, B.; Raïssi, T.; Amairi, M.; Gucik-Derigny, D.; Aoun, M. Robust state estimation for singularly perturbed systems Article de journal Dans: International Journal of Control, vol. 90, no. 3, p. 582 – 595, 2017, (Cited by: 6). Résumé | Liens | BibTeX | Étiquettes: Cooperativity, Interval observers, Linear systems, Lower and upper bounds, Measurement Noise, Numerical methods, Perturbation techniques, Robust state estimation, Singularly perturbed, Singularly perturbed systems, uncertainties, Uncertainty analysis @article{Yousfi2017582b, This paper deals with the design of interval observers for singularly perturbed linear systems. The full-order system is first decoupled into slow and fast subsystems. Then, using the cooperativity theory, an interval observer is designed for the slow and fast subsystems assuming that the measurement noise and the disturbances are bounded and the singular perturbed parameter is uncertain. This decoupling leads to two observers that estimate the lower and upper bounds for the feasible state domain. A numerical example shows the efficiency of the proposed technique. © 2016 Informa UK Limited, trading as Taylor & Francis Group. |
2015 |
Yousfi, B.; Raïssi, T.; Amairi, M.; Aoun, M. Set-membership methodology for model-based systems prognosis Conférence vol. 28, no. 21, 2015, (Cited by: 3; All Open Access, Bronze Open Access). Résumé | Liens | BibTeX | Étiquettes: Fault detection, Interval estimation, Interval observers, Lower and upper bounds, Measurement Noise, Model-based systems, nocv1, Plant management, Set membership, Unknown input observer, Unknown inputs @conference{Yousfi2015302b, This paper addresses unknown input interval estimation and prognosis for a class of uncertain systems. Under the assumption that the measurement noise and the disturbances are bounded, lower and upper bounds for the unmeasured state and unknown inputs are computed. Then, damage state estimation is formulated as a set-inversion problem. The setmembership methodology is applied to an electromechanical oscillator to show the effectiveness of the proposed technique. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved. |
2014 |
Yousfi, B.; Raissi, T.; Amairi, M.; Aoun, M. Interval observers design for singularly perturbed systems Conférence vol. 2015-February, no. February, 2014, (Cited by: 4). Résumé | Liens | BibTeX | Étiquettes: Convergence of numerical methods, Cooperativity, Full order system, Interval observers, Lower and upper bounds, Numerical methods, Perturbation techniques, Singularly perturbed systems, Slow subsystem, State values, Uncertainty analysis @conference{Yousfi20141637b, This paper deals with interval observers design for two-time singularly perturbed systems. The full-order system is firstly decoupled into slow and fast subsystems. Then, using the cooperativity theory, an interval observer is designed for the slow subsystem assuming that the singular perturbed parameter is uncertain. This decoupling leads to two observers that estimate the lower and upper bounds for state values. A numerical example shows the efficiency of the proposed technique. © 2014 IEEE. |
Publications
2020 |
Interval observer design for continuous-time switched systems under known switching and unknown inputs Article de journal Dans: International Journal of Control, vol. 93, no. 5, p. 1088 – 1101, 2020, (Cited by: 12). |
2018 |
Interval Observer Design for Actuator Fault Estimation of Linear Parameter-Varying Systems Conférence vol. 51, no. 24, 2018, (Cited by: 5; All Open Access, Bronze Open Access, Green Open Access). |
2017 |
Robust state estimation for singularly perturbed systems Article de journal Dans: International Journal of Control, vol. 90, no. 3, p. 582 – 595, 2017, (Cited by: 6). |
2015 |
Set-membership methodology for model-based systems prognosis Conférence vol. 28, no. 21, 2015, (Cited by: 3; All Open Access, Bronze Open Access). |
2014 |
Interval observers design for singularly perturbed systems Conférence vol. 2015-February, no. February, 2014, (Cited by: 4). |