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Decentralized Fault Tolerant Control for Modular Robot Manipulators via Integral Terminal Sliding Mode and Disturbance Observer

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  • Robot and Applications
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Abstract

A novel decentralized fault tolerant approach for modular robot manipulators (MRMs) with external disturbances is proposed via an integral terminal sliding mode and disturbance observer. First, an integral terminal sliding mode control strategy is designed for fault tolerant control of MRMs system. Next, to eliminate the effect of uncertainty, radial basis function neural networks (RBFNN) and nonlinear disturbance observers (DO) are constructed to deal with the uncertainty of MRMs system, which includes the interconnected dynamic coupling (IDC), faults, external disturbance, friction terms, and the neural network estimation errors. And then, in order to reduce the chattering, the super twist algorithm (STA) is designed to enhance the dynamic performance of MRMs system. Based on the Lyapunov theory, the stability of MRMs system is demonstrated under the proposed decentralized fault tolerant control strategy. Finally, the effectiveness and advantages of the proposed algorithm are verified by constructing computer simulation.

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Correspondence to Yuanchun Li.

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This work is supported by the National Natural Science Foundation of China (Grant no. 61773075 and 61703055), the Scientific Technological Development Plan Project in Jilin Province of China (Grant nos. 20200801056GH, 20200404208YY, and 20190103004JH), and the Science and Technology project of Jilin Provincial Education Department of China during the 13th Five-Year Plan Period (JJKH20200672KJ, JJKH20200673KJ, JJKH20210767KJ, and JJKH20200674KJ).

Zengpeng Lu received his B.S. and M.S. degrees from Changchun University of Technology, China, in 2017 and 2020, respectively. He is currently working towards a Ph.D. degree in the Department of Mechanical Engineering, Changchun University of Technology, China. His research interests include intelligent mechanical, robot control, and fault tolerant control.

Yan Li received his B.E. degree from the Changchun University of Technology, Changchun, China, in 2001, an M.S. degree from Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China, in 2006, and a Ph.D. degree from the Changchun University of Technology, China, in 2020. His research interests include intelligent mechanical and robot control.

Xirui Fan received her M.S. degree in electrical engineering from Changchun University of Technology, Changchun, China, in 2020, where she works in Changchun Branch of China United Communications Co., Ltd. Her research interests include intelligent control and adaptive control.

Yuanchun Li received his M.S. and Ph.D. degrees from Harbin Institute of Technology, China, in 1987 and 1990, respectively. He is currently a Professor in Changchun University of Technology, China. He is also a Professor in Jilin University, China. His research interest covers complex system modeling, intelligent mechanical, and robot control.

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Lu, Z., Li, Y., Fan, X. et al. Decentralized Fault Tolerant Control for Modular Robot Manipulators via Integral Terminal Sliding Mode and Disturbance Observer. Int. J. Control Autom. Syst. 20, 3274–3284 (2022). https://doi.org/10.1007/s12555-021-0287-6

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