Publications

@conference{Dadi2022190b,

title = {Set-Membership Fault Detection for Discrete-time Switched Linear Systems},

author = {Leila Dadi and Haifa Ethabet and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143822450\&doi=10.1109%2fSSD54932.2022.9955834\&partnerID=40\&md5=845297a35126246541ad5d43c4f68b5e},

doi = {10.1109/SSD54932.2022.9955834},

year  = {2022},

date = {2022-01-01},

journal = {2022 19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022},

pages = {190 \textendash 194},

abstract = {This work deals with Fault Detection (FD) for a class of discrete-time switched linear systems with actuator faults subject to bounded disturbances. First, based on cooperativity and stability conditions and under the assumption that disturbances and measurement noise are unknown but bounded, upper and lower bounds of the state are calculated using an interval observer. The design conditions of the observer are expressed in terms of Linear Matrix Inequalities (LMIs). Second, a fault detection decision is developed to indicate the presence of faults using interval analysis. Simulation results are provided to illustrate the performance of the proposed fault detection approach. © 2022 IEEE.},

note = {Cited by: 0},

keywords = {Actuator fault, Actuators, Bounded disturbances, Cooperativity, Discrete time, Fault detection, Faults detection, Interval observers, Linear matrix inequalities, Linear systems, Set-membership, Stability condition, Switched linear system, Switched system},

pubstate = {published},

tppubtype = {conference}

}

@conference{Dadi2022190,

title = {Set-Membership Fault Detection for Discrete-time Switched Linear Systems},

author = {Leila Dadi and Haifa Ethabet and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143822450\&doi=10.1109%2fSSD54932.2022.9955834\&partnerID=40\&md5=845297a35126246541ad5d43c4f68b5e},

doi = {10.1109/SSD54932.2022.9955834},

year  = {2022},

date = {2022-01-01},

journal = {2022 19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022},

pages = {190 \textendash 194},

abstract = {This work deals with Fault Detection (FD) for a class of discrete-time switched linear systems with actuator faults subject to bounded disturbances. First, based on cooperativity and stability conditions and under the assumption that disturbances and measurement noise are unknown but bounded, upper and lower bounds of the state are calculated using an interval observer. The design conditions of the observer are expressed in terms of Linear Matrix Inequalities (LMIs). Second, a fault detection decision is developed to indicate the presence of faults using interval analysis. Simulation results are provided to illustrate the performance of the proposed fault detection approach. © 2022 IEEE.},

note = {Cited by: 0},

keywords = {Actuator fault, Actuators, Bounded disturbances, Cooperativity, Discrete time, Fault detection, Faults detection, Interval observers, Linear matrix inequalities, Linear systems, Set-membership, Stability condition, Switched linear system, Switched system},

pubstate = {published},

tppubtype = {conference}

}

@conference{Hassen2022823,

title = {Diagnosis of Nonlinear Delay Systems},

author = {W. B. Hassen and A. Tellili and N. Abdelkrim and M. I. Wardi},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143820633\&doi=10.1109%2fSSD54932.2022.9955721\&partnerID=40\&md5=67fb02c8efb381a579f7d5e96360d0d0},

doi = {10.1109/SSD54932.2022.9955721},

isbn = {9781665471084},

year  = {2022},

date = {2022-01-01},

journal = {2022 19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022},

pages = {823-828},

publisher = {Institute of Electrical and Electronics Engineers Inc.},

abstract = {The general theme of this article concerns the diagnosis of nonlinear delay systems. Parity space and observers approaches are used to generate residuals. To accomplish fault isolation, we use a bank of observers for all possible faulty models. The paper considers constant actuator faults, that is, the outputs of some actuators are stuck at fixed undesirable constant values. The fault isolation strategy is based on combining the conventional observer design techniques with adaptation techniques. Based on the designed observers, a bank of residuals are defined correspondingly. The actuator faults can be isolated if only one residual goes to zero while the others do not. The faulty model with residual approaching zero identifies the faulty actuators. For linear and nonlinear systems with all states available, new sufficient conditions for fault isolation are derived, which require only that the distribution matrices of the actuators are of full column rank. © 2022 IEEE.},

note = {cited By 0},

keywords = {Actuator fault; Adaptive observer; Constant values; Delayed systems; Delays system; Diagnostic; Dynamic parity space; Fault isolation; Luenberger observers; Parity spaces, Actuators, Fault detection; Nonlinear systems},

pubstate = {published},

tppubtype = {conference}

}

@conference{Dadi2021144b,

title = {Zonotope based Fault Tolerant Control for Discrete-Time Linear Time-Invariant Systems},

author = {Leila Dadi and Haifa Ethabet and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130585277\&doi=10.1109%2fSCC53769.2021.9768392\&partnerID=40\&md5=61871b4c8b1ce06f3c2c0faa57f8e423},

doi = {10.1109/SCC53769.2021.9768392},

year  = {2021},

date = {2021-01-01},

journal = {2021 IEEE 2nd International Conference on Signal, Control and Communication, SCC 2021},

pages = {144 \textendash 149},

abstract = {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.},

note = {Cited by: 1},

keywords = {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},

pubstate = {published},

tppubtype = {conference}

}

@conference{Lamouchi20181199b,

title = {Interval Observer Design for Actuator Fault Estimation of Linear Parameter-Varying Systems},

author = {Rihab Lamouchi and Tarek Ra\"{i}ssi and Messaoud Amairi and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054559690\&doi=10.1016%2fj.ifacol.2018.09.699\&partnerID=40\&md5=de423414de6ba51a4812a058275b7b0a},

doi = {10.1016/j.ifacol.2018.09.699},

year  = {2018},

date = {2018-01-01},

volume = {51},

number = {24},

pages = {1199 \textendash 1204},

abstract = {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},

note = {Cited by: 5; All Open Access, Bronze Open Access, Green Open Access},

keywords = {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},

pubstate = {published},

tppubtype = {conference}

}

@conference{Houiji2018810b,

title = {Fault diagnosis and fault tolerant control against simultaneous sensor and actuator faults for linear stochastic systems},

author = {Marwa Houiji and Rim Hamdaoui and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060587807\&doi=10.1109%2fSSD.2018.8570481\&partnerID=40\&md5=2374c560f4bc8c459a08488691d1ba21},

doi = {10.1109/SSD.2018.8570481},

year  = {2018},

date = {2018-01-01},

journal = {2018 15th International Multi-Conference on Systems, Signals and Devices, SSD 2018},

pages = {810 \textendash 815},

abstract = {This paper presents the problem of robust fault diagnosis and accommodation for a class of linear stochastic systems where simultaneous actuator and sensor faults may occur at a given time. Firstly, based on Augmented Robust Three stage Kalman filters (ARThSKF) we obtained both the fault estimation and the residual signal. Then, residual evaluation is achieved by making use of an adaptive threshold adjustment algorithm based on the grey theory. Obtained results show that the false-alarm rates and the missing alarm rates are minimized by the developed method; also this approach detects small or incipient faults more effectively than the classical robust fault detection algorithms with fixed thresholds. Finally, an additive control input is introduced for cancelling out the fault's effect on the system. We evaluate our proposal through simulation and we demonstrate its feasibility. © 2018 IEEE.},

note = {Cited by: 1},

keywords = {Actuator and sensor faults, Actuators, Adaptive threshold adjustments, Adaptive thresholds, ARThSK, Failure analysis, Fault accommodation, Fault detection, Linear stochastic system, Robust fault detection, Robust fault diagnosis, Stochastic control systems, Stochastic systems},

pubstate = {published},

tppubtype = {conference}

}

@conference{Houiji2018810,

title = {Fault diagnosis and fault tolerant control against simultaneous sensor and actuator faults for linear stochastic systems},

author = {Marwa Houiji and Rim Hamdaoui and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060587807\&doi=10.1109%2fSSD.2018.8570481\&partnerID=40\&md5=2374c560f4bc8c459a08488691d1ba21},

doi = {10.1109/SSD.2018.8570481},

year  = {2018},

date = {2018-01-01},

journal = {2018 15th International Multi-Conference on Systems, Signals and Devices, SSD 2018},

pages = {810 \textendash 815},

abstract = {This paper presents the problem of robust fault diagnosis and accommodation for a class of linear stochastic systems where simultaneous actuator and sensor faults may occur at a given time. Firstly, based on Augmented Robust Three stage Kalman filters (ARThSKF) we obtained both the fault estimation and the residual signal. Then, residual evaluation is achieved by making use of an adaptive threshold adjustment algorithm based on the grey theory. Obtained results show that the false-alarm rates and the missing alarm rates are minimized by the developed method; also this approach detects small or incipient faults more effectively than the classical robust fault detection algorithms with fixed thresholds. Finally, an additive control input is introduced for cancelling out the fault's effect on the system. We evaluate our proposal through simulation and we demonstrate its feasibility. © 2018 IEEE.},

note = {Cited by: 1},

keywords = {Actuator and sensor faults, Actuators, Adaptive threshold adjustments, Adaptive thresholds, ARThSK, Failure analysis, Fault accommodation, Fault detection, Linear stochastic system, Robust fault detection, Robust fault diagnosis, Stochastic control systems, Stochastic systems},

pubstate = {published},

tppubtype = {conference}

}

@conference{Lamouchi20174033b,

title = {Actuator Fault Compensation in a Set-membership Framework for Linear Parameter-Varying Systems},

author = {Rihab Lamouchi and Messaoud Amairi and Tarek Ra\"{i}ssi and Mohamed Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031808952\&doi=10.1016%2fj.ifacol.2017.08.721\&partnerID=40\&md5=4dd785827818b10f42471334f4257294},

doi = {10.1016/j.ifacol.2017.08.721},

year  = {2017},

date = {2017-01-01},

journal = {IFAC-PapersOnLine},

volume = {50},

number = {1},

pages = {4033 \textendash 4038},

abstract = {This paper presents an actuator fault compensation approach for a class of Linear Parameter-Varying (LPV) systems with noisy measurements. The proposed method is based on interval estimation assuming that the fault vector and the external disturbances are unknown but bounded. The main idea consists in designing a control law, based on a linear state feedback, to guarantee closed-loop stability. An additive control, based on fault bounds, is used to compensate the impact of actuator faults on system performances. The closed-loop stability of the robust fault compensation scheme is established in the Lyapunov sense. Finally, the theoretical results are illustrated using a numerical example. © 2017},

note = {Cited by: 11; All Open Access, Bronze Open Access, Green Open Access},

keywords = {Actuator fault, Actuators, Closed loop stability, Convergence of numerical methods, External disturbances, Interval estimation, Interval observers, Linear parameter varying systems, Linear state feedback, Linear systems, State feedback, Unknown but bounded},

pubstate = {published},

tppubtype = {conference}

}

@conference{Lamouchi20174033,

title = {Actuator Fault Compensation in a Set-membership Framework for Linear Parameter-Varying Systems},

author = {R. Lamouchi and M. Amairi and T. Ra\"{i}ssi and M. Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031808952\&doi=10.1016%2fj.ifacol.2017.08.721\&partnerID=40\&md5=4dd785827818b10f42471334f4257294},

doi = {10.1016/j.ifacol.2017.08.721},

issn = {24058963},

year  = {2017},

date = {2017-01-01},

journal = {IFAC-PapersOnLine},

volume = {50},

number = {1},

pages = {4033-4038},

publisher = {Elsevier B.V.},

abstract = {This paper presents an actuator fault compensation approach for a class of Linear Parameter-Varying (LPV) systems with noisy measurements. The proposed method is based on interval estimation assuming that the fault vector and the external disturbances are unknown but bounded. The main idea consists in designing a control law, based on a linear state feedback, to guarantee closed-loop stability. An additive control, based on fault bounds, is used to compensate the impact of actuator faults on system performances. The closed-loop stability of the robust fault compensation scheme is established in the Lyapunov sense. Finally, the theoretical results are illustrated using a numerical example. © 2017},

note = {cited By 11},

keywords = {Actuator fault; Closed loop stability; External disturbances; Interval estimation; Interval observers; Linear parameter varying systems; Linear state feedback; Unknown but bounded, Actuators, Convergence of numerical methods; Linear systems; State feedback},

pubstate = {published},

tppubtype = {conference}

}

@conference{Lamouchi20161099b,

title = {Fault tolerant control in a set-membership framework},

author = {R. Lamouchi and T. Ra\"{i}ssi and M. Amairi and M. Aoun},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85015078241\&doi=10.1109%2fECC.2016.7810436\&partnerID=40\&md5=b05b24d41c3686fc879efa9f518522bd},

doi = {10.1109/ECC.2016.7810436},

year  = {2016},

date = {2016-01-01},

journal = {2016 European Control Conference, ECC 2016},

pages = {1099 \textendash 1104},

abstract = {In this paper, a Passive Fault Tolerant Control (PFTC) strategy for Linear Time Invariant (LTI) systems subject to actuator faults is proposed. The idea of this PFTC method is to compute a control law to cope with additive actuator faults using interval observers. The considered system is assumed to be subject to bounded noises and disturbances without any additional assumptions. The FTC is implemented as a state linear feedback control and designed using interval observers techniques. A numerical example shows the efficiency of the proposed technique. © 2016 EUCA.},

note = {Cited by: 3},

keywords = {Actuator fault, Actuators, Bounded disturbances, Bounded noise, Control laws, Control methods, Control strategies, Fault tolerance, Faults tolerant controls, Interval observers, Linear control systems, Linear time-invariant system, Numerical methods, Set-membership, State feedback},

pubstate = {published},

tppubtype = {conference}

}

@conference{Najari2014,

title = {Actuator faults estimation using adaptive Luenberger Bond Graph observer},

author = {H. Najari and R. El Harabi and M. N. Abdelkrim},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946687036\&doi=10.1109%2fCISTEM.2014.7076935\&partnerID=40\&md5=7246a689f9ca1f880e2192c3c08df171},

doi = {10.1109/CISTEM.2014.7076935},

isbn = {9781479973002},

year  = {2014},

date = {2014-01-01},

journal = {2014 International Conference on Electrical Sciences and Technologies in Maghreb, CISTEM 2014},

publisher = {Institute of Electrical and Electronics Engineers Inc.},

abstract = {A new method of adaptive Luenberger observer design used on actuator fault detection and estimation is investigated. This approach is based on Bond Graph representation which is a multidisciplinary tool characterised by its causal, behavioral and structural properties for control and diagnosis analysis. Thus, the necessary existence conditions are taking in consideration. An hydraulic system with two backs is considered to ensure the efficiency of the proposed graphical observer. © 2014 IEEE.},

note = {cited By 1},

keywords = {Actuator fault; Actuator fault detection; Adaptive luenberger observers; Bond graph; Existence conditions; Hydraulic system, Actuators, Fault detection; Graph theory; Hydraulic equipment},

pubstate = {published},

tppubtype = {conference}

}

@conference{Abdelkrim2011,

title = {Actuator fault tolerant control for delayed systems},

author = {N. Abdelkrim and A. Tettili and M. N. Abdelkrim},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-79957913460\&doi=10.1109%2fSSD.2011.5767409\&partnerID=40\&md5=50381533c101898af77ccf62711adb6e},

doi = {10.1109/SSD.2011.5767409},

isbn = {9781457704130},

year  = {2011},

date = {2011-01-01},

journal = {International Multi-Conference on Systems, Signals and Devices, SSD'11 - Summary Proceedings},

abstract = {The actuator fault estimation and a fault tolerant control (FTC) for delayed system are proposed in this paper. The estimation of actuator fault is realized by using the Luen-berger observer, and the fault tolerant control is obtained by adding an additive control law to the nominal one. The nominal control of delayed system is designed by using the Lambert-W function. finally, a simulation example is illustrated in the end of this paper. © 2011 IEEE.},

note = {cited By 2},

keywords = {Actuator fault; Control laws; Delayed systems; Fault tolerant control; Lambert W method; Luenberger observer; Simulation example, Actuators},

pubstate = {published},

tppubtype = {conference}

}

@conference{Boussaid2011,

title = {Two-level active fault tolerant control approach},

author = {B. Boussaid and C. Aubrun and M. N. Abdelkrim},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-79957911611\&doi=10.1109%2fSSD.2011.5767392\&partnerID=40\&md5=76ca112ce6738654730ff6821b93e3f3},

doi = {10.1109/SSD.2011.5767392},

isbn = {9781457704130},

year  = {2011},

date = {2011-01-01},

journal = {International Multi-Conference on Systems, Signals and Devices, SSD'11 - Summary Proceedings},

abstract = {In this paper, a two-level reconfiguration action is used to design an Active Fault Tolerant Control (AFTC) system. The first level of the procedure is triggered when the impact of the fault on the system performance is limited. The reconfigurable controller is updated by the new post-fault system model. At the second level a dynamic reference modification based on Reference Governor (RG) is proposed. The idea consists of modifying the set-point or reference according to the allowable performance degradation and the system constraints which become more strict after fault occurrence in order to avoid any actuator saturation and ensure system stability. The effectiveness of the proposed solution is illustrated by a wind turbine example subjects to actuator faults and constrained on the actuator dynamic ranges. © 2011 IEEE.},

note = {cited By 13},

keywords = {Active fault tolerant control; Actuator dynamics; Actuator fault; Actuator saturations; LQ control; Performance degradation; Post-fault systems; Reconfigurable controllers; Reconfiguration actions; Reference Governor; Reference governors; Second level; System constraints, Actuators, Degradation; Governors; System stability; Wind power},

pubstate = {published},

tppubtype = {conference}

}