An adaptive actuator failure compensation controller using output feedback

An adaptive control scheme using output feedback for output tracking is developed for systems with unknown actuator failures. Such actuator failures are characterized by some unknown inputs stuck at some unknown fixed values at unknown time instants. An effective output feedback controller structure...

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Bibliographic Details
Published in:IEEE transactions on automatic control 2002-03, Vol.47 (3), p.506-511
Main Authors: Tao, G., Chen, S., Joshi, S.M.
Format: Article
Language:English
Subjects:
Actuator failure
Actuators
Adaptive control
Adaptive control systems
Applied sciences
Asymptotic properties
Compensation
Computer science
control theory
systems
Control system analysis
Control system synthesis
Control theory. Systems
Exact sciences and technology
Failure analysis
Impedance matching
Matching
Output feedback
Parameter estimation
Programmable control
Signal analysis
Tracking
Uncertain systems
Uncertainty
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Summary:An adaptive control scheme using output feedback for output tracking is developed for systems with unknown actuator failures. Such actuator failures are characterized by some unknown inputs stuck at some unknown fixed values at unknown time instants. An effective output feedback controller structure is proposed for actuator failure compensation. When implemented with true matching parameters, the controller achieves desired plant-model output matching. When implemented with adaptive parameter estimates, the controller achieves asymptotic output tracking. A stable adaptive law is derived for parameter adaptation in the presence of parameter uncertainties. Closed-loop signal boundedness and asymptotic output tracking, despite the uncertainties in actuator failures and plant parameters, are ensured analytically and verified by simulation results.
ISSN:0018-9286
1558-2523
DOI:10.1109/9.989150