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<p>The paper addresses issues of chattering and long transition time in permanent magnet marine main propulsion motors at medium and high speeds. It introduces a variable boundary layer function to suppress chattering, a phase-locked loop with a signal suppressor to enhance rotor position recognition accuracy, and a new integral sliding mode function to improve system state convergence speed, making the control system more robust. Additionally, a Lyapunov function is constructed to demonstrate algorithm stability. The designed control strategy is simulated and verified using Matlab/Simulink software under various operating conditions. The results demonstrate that compared to traditional sliding mode controllers, the proposed control strategy offers advantages in the medium and high-speed working region of the main propulsion motor, including fast convergence speed, reduced chattering, minimal steady-state error, and strong robustness. This research carries theoretical significance for applying sliding mode control theory to permanent magnet marine main propulsion motors.</p>

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Design and simulation of control strategy for medium and high speed zone of ship’s main propulsion motor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Yan Langtao,
  • Liu Guangyin,
  • Ren Yiran

摘要

The paper addresses issues of chattering and long transition time in permanent magnet marine main propulsion motors at medium and high speeds. It introduces a variable boundary layer function to suppress chattering, a phase-locked loop with a signal suppressor to enhance rotor position recognition accuracy, and a new integral sliding mode function to improve system state convergence speed, making the control system more robust. Additionally, a Lyapunov function is constructed to demonstrate algorithm stability. The designed control strategy is simulated and verified using Matlab/Simulink software under various operating conditions. The results demonstrate that compared to traditional sliding mode controllers, the proposed control strategy offers advantages in the medium and high-speed working region of the main propulsion motor, including fast convergence speed, reduced chattering, minimal steady-state error, and strong robustness. This research carries theoretical significance for applying sliding mode control theory to permanent magnet marine main propulsion motors.