Abstract
This paper proposes a nonlinear disturbance observer-based continuous fixed-time tracking control scheme for uncertain robotic systems. A nonlinear disturbance observer is constructed to estimate and reject the lumped disturbance of the control systems in real-time. It exhibits good results in terms of disturbance estimating and computational cost. Based on the disturbance observer, a fixed-time tracking control scheme for the uncertain robotic system is presented. Compared with the existing fast nonsingular integral terminal sliding mode controller, the proposed controller ensures local fixed-time convergence of both velocity tracking error and position tracking error. The stability and fixed-time convergence of the proposed controller are analyzed using the Lyapunov theory. Finally, comparative simulations of both the numerical and application examples are conducted to verify the proposed control schemes’ effectiveness, indicating that the continuous fixed-time tracking control scheme can be used effectively for robotic systems.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (Grant No. 62173047).
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Li, Y., Zhang, W., Zhou, Y., Tao, Y., Zhu, M. (2023). Nonlinear Disturbance Observer-Based Continuous Fixed-time Tracking Control for Uncertain Robotic Systems. In: Yang, H., et al. Intelligent Robotics and Applications. ICIRA 2023. Lecture Notes in Computer Science(), vol 14271. Springer, Singapore. https://doi.org/10.1007/978-981-99-6495-6_34
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DOI: https://doi.org/10.1007/978-981-99-6495-6_34
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