NDLI: Adaptive compensation for actuator failure in a class of non-linear time-delay systems

Content Provider	IET Digital Library
Author	Hashemi, Mahnaz Askari, Javad Ghaisari, Jafar Kamali, Marzieh
Abstract	This study presents a state feedback adaptive controller for a class of parametric-strict-feedback non-linear systems with multiple bounded time-varying state delays and in the presence of time-varying actuator failures. The type of the considered actuator failure is that some unknown inputs may be stuck at some unknown time-varying values where the parameters, times and patterns of the failures are also unknown. The considered actuator failure can cover most failures that may occur in actuators of the systems. The adaptive state feedback control scheme is constructed based on a backstepping design method. The boundedness of all the closed-loop signals is guaranteed and the tracking error is proved to converge to a small neighbourhood of the origin. The proposed approach is employed for a second-order time delay plant as well as a two-stage chemical reactor with delayed recycle streams. The simulation results show the correctness and effectiveness of the proposed adaptive compensation in the case of actuator failures.
Starting Page	710
Ending Page	722
Page Count	13
ISSN	17518644
Volume Number	9
e-ISSN	17518652
Issue Number	Issue 5, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/9/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2014.0504
Journal	IET Control Theory & Applications
Publisher Date	2015-03-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Actuating And Final Control Device Actuators Adaptive Compensation Adaptive Control Adaptive Controller Backstepping Design Closed Loop System Closed-loop Signal Compensation Control System Analysis Control System Synthesis Delay System Distributed Parameter Control System Nonlinear Control System Nonlinear Time-delay System Parametric-strict-feedback Nonlinear System Second-order Time Delay Self Adjusting Control System State Feedback Synthesis Method Time Varying Control System Time Varying System Time-varying Actuator Failure Time-varying State Delay
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications

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