Abstract
A cart-pendulum system is a typical underactuated mechanical system with two degrees of freedom and one control input. The fixed-time stabilization control problem for this system is studied in this paper. A fixed-time hierarchical sliding mode control method is developed to solve this problem. Firstly, the system is divided into two subsystems. And two first-level sliding mode surfaces are designed for these two subsystems respectively. Secondly, a second-level sliding mode surface is constructed by linearly combining two first-level sliding mode surfaces. After that, a hierarchical sliding mode controller is designed based on the designed sliding mode surfaces. It enables the state variables of closed-loop control system to be stabilized at the origin within a fixed-time. This means that the settling time can be limited within a range and does not depend on the initial state value of the system. Finally, a numerical example is given to show the effectiveness of the developed control method.
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Acknowledgements
This work was supported in part by the Taishan Scholar Program of Shandong Province under Grant No. tsqn202211240, the Natural Science Foundation Program of Shandong Province under Grant No. ZR2019YQ28, the Development Plan of Youth Innovation Team of University in Shandong Province under Grant No. 2019KJN007, the Postgraduate Education Reform Project of Shandong Province,Grant/Award Number: SDYJG21045.
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Fan, L., Zhang, A., Liang, X. et al. Fixed-time stabilization of underactuated cart-pendulum system based on hierarchical sliding mode control method. Nonlinear Dyn (2024). https://doi.org/10.1007/s11071-024-09650-4
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DOI: https://doi.org/10.1007/s11071-024-09650-4