Neural super-twisting sliding mode control of the ball and plate system with prescribed performance
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Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, P. R. China

Clc Number:

TP273

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Supported by National Natural Science Foundation of China (61163051).

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    Abstract:

    A novel control method, the self-recurrent wavelet neural network super-twisting non-singular fast terminal sliding mode (SRWNN_STNFTSM) control with prescribed performance, is proposed to improve the tracking control performance of the ball and plate system in the presence of dynamic uncertainties and unknown perturbations. The prescribed performance function (PPF) is used to convert the originally constrained position error of the ball and plate system into an unconstrained error model. The non-singular fast terminal sliding mode control (NFTSMC) sliding mode surface is introduced to resolve the singular issue of conventional terminal sliding mode control. Additionally, a compensation term of the tanh function is incorporated to improve the NFTSM sliding mode surface, adjusting the convergence speed and tracking accuracy. Moreover, the SRWNN_ STNFTSM controller is combined with the super-distortion algorithm (STA) to mitigate the effects of chattering and lumped disturbance. To address the lumped disturbance of the system and ensure high tracking accuracy, an adaptive SRWNN compensator is designed in conjunction with the STNFTSM. This compensator is aimed at eliminating disturbances and ensuring robustness. Simulation results compared with existing conventional sliding mode control methods demonstrate that SRWNN_STNFTSM exhibits excellent performance. It accurately tracks the ball and plate system under the influence of lumped disturbances.

    Fig.1 SRWNN structure
    Fig.2 Position tracking
    Fig.3 Position tracking error
    Fig.4 Control input and sliding mode response
    Fig.5 Comparison of tracking effect with or without tanh function
    Fig.6 Trace response
    Fig.7 Lumped disturbance estimation
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夏国锋,向凤红.具有预设性能的板球系统神经超扭曲滑模控制[J].重庆大学学报,2024,47(7):98~109

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  • Received:May 08,2022
  • Online: August 15,2024
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