Nonlinear and Adaptive Control Design
Nonlinear and Adaptive Control Design
Automatica (Journal of IFAC)
Adaptive output feedback control of nonlinear systems with actuator failures
Information Sciences: an International Journal
Brief Paper: Reliable State Feedback Control System Design Against Actuator Failures
Automatica (Journal of IFAC)
Brief Reliable H∞ controller design for linear systems
Automatica (Journal of IFAC)
| Hi-index | 22.14 |
It is both theoretically and practically important to investigate the problem of accommodating infinite number of actuator failures or faults in controlling uncertain systems. However, there is still no result available in developing adaptive controllers to address this problem. In this paper, a new adaptive failure/fault compensation control scheme is proposed for parametric strict feedback nonlinear systems. The techniques of nonlinear damping and parameter projection are employed in the design of controllers and parameter estimators, respectively. It is proved that the boundedness of all closed-loop signals can still be ensured in the case with infinite number of failures or faults, provided that the time interval between two successive changes of failure/fault pattern is bounded below by an arbitrary positive number. The performance of the tracking error in the mean square sense with respect to the frequency of failure/fault pattern changes is also established. Moreover, asymptotic tracking can be achieved when the total number of failures and faults is finite.