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Robust Adaptive Dynamic Surface Control of Multi-link Flexible Joint Manipulator with Input Saturation

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Abstract

This paper investigates the tracking control for multi-link flexible joint manipulator system with disturbance, uncertain stiffness and input saturation. A robust adaptive dynamic surface control scheme is developed with an auxiliary dynamic system. The auxiliary dynamic system is employed to handle input saturation. To compensate for disturbance, an adaptive law for disturbance upper bound estimation is designed. The value of uncertain stiffness is updated by another adaptive law. It is proved that the proposed control scheme can realize precise tracking of link angles and guarantee the uniform ultimate boundedness of all the signals in the closed-loop by appropriately choosing the parameters to be designed. Finally, simulation results demonstrate the effectiveness of the proposed control method.

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Funding

This work is supported by National Natural Science Foundation of China (61973167).

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Correspondence to Yu Guo.

Additional information

Wei Yao received his B.S. degree in electrical information from Nanjing University of Science and Technology in 2014. Now he is a Ph.D. student in control science and engineering from Nanjing University of Science and Technology. His research interests include nonlinear control, adaptive control, vibration control, robot manipulator.

Yu Guo received her B.S. and M.S. degrees in automation from Huazhong University of Science and Technology, Wuhan, China, in 1984 and 1987, respectively, and a Ph.D. degree in control science and engineering from Nanjing University of Science and Technology. In 1987, she joined the faculty of the School of Automation, Nanjing University of Science and Technology, and is currently a Professor of Automatic Control there. Her main research interests include intelligent robot control, optimization for complicated systems and so forth.

Yi-Fei Wu received his Ph.D. degree in automation at Nanjing University of Science and Technology in 2014. He is currently a Professor in School of Automation, Nanjing University of Science and Technology. His research interests include servo system control, intelligent robots and integrated navigation.

Jian Guo received his Ph.D. degree in automation at Nanjing University of Science and Technology in 2002. He was a visiting scholar at Purdue University from 2008 to 2009 and is currently a Professor of Automatic Control at Nanjing University of Science and Technology. His research interests focus on robot system design and automatic control.

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Yao, W., Guo, Y., Wu, YF. et al. Robust Adaptive Dynamic Surface Control of Multi-link Flexible Joint Manipulator with Input Saturation. Int. J. Control Autom. Syst. 20, 577–588 (2022). https://doi.org/10.1007/s12555-020-0176-x

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  • DOI: https://doi.org/10.1007/s12555-020-0176-x

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