Adaptive robust fault-tolerant control for linear MIMO systems with unmatched uncertainties |
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Authors: | Kangkang Zhang Xing-Gang Yan Zehui Mao |
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Affiliation: | 1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;2. Jiangsu Key Laboratory of Internet of Things and Control Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing, China;3. School of Engineering and Digital Arts, University of Kent, Canterbury, Kent, United Kingdom |
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Abstract: | In this paper, two novel fault-tolerant control design approaches are proposed for linear MIMO systems with actuator additive faults, multiplicative faults and unmatched uncertainties. For time-varying multiplicative and additive faults, new adaptive laws and additive compensation functions are proposed. A set of conditions is developed such that the unmatched uncertainties are compensated by actuators in control. On the other hand, for unmatched uncertainties with their projection in unmatched space being not zero, based on a (vector) relative degree condition, additive functions are designed to compensate for the uncertainties from output channels in the presence of actuator faults. The developed fault-tolerant control schemes are applied to two aircraft systems to demonstrate the efficiency of the proposed approaches. |
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Keywords: | Fault-tolerant control adaptive and robust control loss of effectiveness faults stuck faults unmatched uncertainties |
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