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Fault Diagnosis and Fault Tolerant Control for Manipulator with Actuator Multiplicative Fault

Yawei Wu and Lina Yao*
International Journal of Control, Automation, and Systems, vol. 19, no. 2, pp.980-987, 2021

Abstract : In this paper, a new fault diagnosis and fault tolerant control algorithm for manipulators with actuator multiplicative fault is proposed. The dynamic model of the manipulator with disturbance is taken as the research object. When faults occur in the actuator, a nonlinear observer based on radial basis function (RBF) neural network is used to estimate the fault information. After the fault information is obtained, an adaptive back-stepping sliding mode controller is used to control the manipulator to reach the desired trajectory. At last, an illustrated example is given to demonstrate the efficiency of the proposed algorithm, and satisfactory results have been obtained.

Keyword : Actuator multiplicative fault, fault diagnosis, fault-tolerant control, manipulator, RBF.

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