[en] In this paper, a learning-based nearly optimal control framework with fault-tolerant capability is designed to tackle the tracking control problem of a flexible-link manipulator in the presence of actuator fault and model uncertainties. Initially, the optimal control law is obtained by adopting the dynamic programming and a critic structure as the solution of Hamilton–Jacobi–Bellman equation for the nominal model. Then, by implementing an integral sliding mode control, the robustness against actuator fault and model uncertainty is guaranteed. The adaptive laws are constructed based on radial basis functions neural networks to estimate the upper bound of uncertainty and the actuator bias fault, satisfying both optimal performance and chattering reduction of the sliding surface. Furthermore, the actuator effectiveness loss is handled. The stability of the closed-loop system is analytically proven, and the performance of the proposed framework is investigated against several practical operating conditions. This incorporates the fidelity assessment of tracking precision and trackability of control signal using performance indices such as the integral absolute error and root-mean-square error. The results of extensive simulation studies confirm the effectiveness and robustness of the proposed control framework.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Raoufi, Mona; Department of Electrical Engineering, Hamedan University of Technology, Hamedan, Iran
HABIBI, Hamed ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > Automation
Yazdani, Amirmehdi ; School of Engineering and Energy, Murdoch University, Perth, Australia
Wang, Hai; School of Engineering and Energy, Murdoch University, Perth, Australia
External co-authors :
yes
Language :
English
Title :
A learning-based nearly optimal control framework for trajectory tracking of a flexible-link manipulator system with actuator fault
Publication date :
November 2024
Journal title :
Neural Computing and Applications
ISSN :
0941-0643
eISSN :
1433-3058
Publisher :
Springer Science and Business Media Deutschland GmbH
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