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A Decentralized fault-tolerant control system for accommodation of failures in higher-order flight control actuators / Jovan D. Boskovic in IEEE Transactions on control systems technology, Vol. 18 N° 5 (Septembre 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 5 (Septembre 2010) . - pp. 1103-1115 Titre : A Decentralized fault-tolerant control system for accommodation of failures in higher-order flight control actuators Type de document : texte imprimé Auteurs : Jovan D. Boskovic, Auteur ; Raman K. Mehra, Auteur Année de publication : 2011 Article en page(s) : pp. 1103-1115 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Adaptive  fault-tolerant  control  (FTC)  Adaptive  flight  control  under  actuator  faillures  Pilot-in-the-loop  simulations  Second-order  actuator  dynamics  Stable  adaptive  algorithms Index. décimale : 629.1 Résumé : In this paper, an effective integrated failure detection and identification (FDI) and fault-tolerant control (FTC) technique is developed for a class of nonlinear systems actuated by actuators that may undergo several different types of failures. Assuming that the actuator dynamics are fast, a baseline controller is designed and, using the singular perturbation arguments, shown to achieve the control objective. Typical failures in flight control actuators are considered next, and online FDI algorithms are derived for second-order actuator dynamics with non-measurable actuator rates, and third-order actuator dynamics when only output of the actuator is measurable. The FDI subsystem is decentralized in that an observer is run at each of the actuators, and the parameter estimates are adjusted using only the local information. The major issue of how to use this information to reconfigure the control law and assure the stability of the resulting closed-loop control system is addressed. An adaptive fault-tolerant controller that uses the parameter estimates from the FDI subsystem at every instant is designed next. It is demonstrated that all the signals in the system are bounded and that the tracking error converges to zero asymptotically despite multiple simultaneous actuator failures even in the case of second or third order actuator dynamics. The properties of the proposed FDI-FTC algorithms are evaluated through piloted simulations of the F/A-18 aircraft. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313825 [article] A Decentralized fault-tolerant control system for accommodation of failures in higher-order flight control actuators [texte imprimé] / Jovan D. Boskovic, Auteur ; Raman K. Mehra, Auteur . - 2011 . - pp. 1103-1115. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 5 (Septembre 2010) . - pp. 1103-1115 Mots-clés : Adaptive  fault-tolerant  control  (FTC)  Adaptive  flight  control  under  actuator  faillures  Pilot-in-the-loop  simulations  Second-order  actuator  dynamics  Stable  adaptive  algorithms Index. décimale : 629.1 Résumé : In this paper, an effective integrated failure detection and identification (FDI) and fault-tolerant control (FTC) technique is developed for a class of nonlinear systems actuated by actuators that may undergo several different types of failures. Assuming that the actuator dynamics are fast, a baseline controller is designed and, using the singular perturbation arguments, shown to achieve the control objective. Typical failures in flight control actuators are considered next, and online FDI algorithms are derived for second-order actuator dynamics with non-measurable actuator rates, and third-order actuator dynamics when only output of the actuator is measurable. The FDI subsystem is decentralized in that an observer is run at each of the actuators, and the parameter estimates are adjusted using only the local information. The major issue of how to use this information to reconfigure the control law and assure the stability of the resulting closed-loop control system is addressed. An adaptive fault-tolerant controller that uses the parameter estimates from the FDI subsystem at every instant is designed next. It is demonstrated that all the signals in the system are bounded and that the tracking error converges to zero asymptotically despite multiple simultaneous actuator failures even in the case of second or third order actuator dynamics. The properties of the proposed FDI-FTC algorithms are evaluated through piloted simulations of the F/A-18 aircraft. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313825