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<p>Aiming at the problem of the nonlinear interference of the transmission gap affecting the electro-hydraulic servo position system, the nonlinear model of the transmission gap is established and the research on gap compensation control is carried out. Firstly, considering the gap discontinuity of the actual electro-hydraulic servo test bench, a quasi-linear gap hysteresis model conforming to the electro-hydraulic servo system is established. Secondly, an improved sparrow algorithm (MSSA) is proposed to identify the parameters of the gap model. Finally, an adaptive control of the gap dynamic inverse model based on the steepest descent is designed to correct the gap discontinuity. The experimental and simulation results show that the compensated controller can effectively suppress the effect of gap nonlinear disturbances on the electro-hydraulic servo position system.</p>

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Gap model identification and compensation method of valve-controlled cylinder system based on improved sparrow search algorithm

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Bingwei Gao,
  • Xiangpeng Tang,
  • Wei Shen,
  • Shuchao Du,
  • Zhonghui Sun,
  • Wenchao Chen

摘要

Aiming at the problem of the nonlinear interference of the transmission gap affecting the electro-hydraulic servo position system, the nonlinear model of the transmission gap is established and the research on gap compensation control is carried out. Firstly, considering the gap discontinuity of the actual electro-hydraulic servo test bench, a quasi-linear gap hysteresis model conforming to the electro-hydraulic servo system is established. Secondly, an improved sparrow algorithm (MSSA) is proposed to identify the parameters of the gap model. Finally, an adaptive control of the gap dynamic inverse model based on the steepest descent is designed to correct the gap discontinuity. The experimental and simulation results show that the compensated controller can effectively suppress the effect of gap nonlinear disturbances on the electro-hydraulic servo position system.