<p>This paper proposes an electromagnetic actuator control strategy utilizing a dual-loop fractional-order composite controller. It targets the moving-coil bilateral electromagnetic actuators in position tracking control, which requires a fast response, high stability, and strong anti-interference capability. First, the structure and working principle of the electromagnetic actuators are analyzed, and the dynamics of the system are modeled. Then, a cascade control strategy is adopted. The traditional controller in the inner loop is replaced with a linear active disturbance rejection controller. Then, fractional-order theory is applied to design the fractional-order linear active disturbance rejection controller. It is used to eliminate both internal and external disturbances, enhancing system response speed and disturbance immunity. Second, a fractional-order PID controller is applied in the outer loop to achieve both speed and accuracy in positioning the electromagnetic actuators. Finally, experimental results demonstrate that the fractional-order PID combined with the fractional-order linear active disturbance rejection controller achieves excellent position-tracking performance and enhanced immunity to interference. In addition, it improves system stability and accuracy.</p>

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Research on dual-loop fractional-order controller for moving-coil bilateral electromagnetic actuators

  • Lei Li,
  • Chuan Zhao,
  • Xin Wang,
  • Feng Sun,
  • Dongning Liu,
  • Junjie Jin,
  • Xuebin Yu,
  • Fangchao Xu

摘要

This paper proposes an electromagnetic actuator control strategy utilizing a dual-loop fractional-order composite controller. It targets the moving-coil bilateral electromagnetic actuators in position tracking control, which requires a fast response, high stability, and strong anti-interference capability. First, the structure and working principle of the electromagnetic actuators are analyzed, and the dynamics of the system are modeled. Then, a cascade control strategy is adopted. The traditional controller in the inner loop is replaced with a linear active disturbance rejection controller. Then, fractional-order theory is applied to design the fractional-order linear active disturbance rejection controller. It is used to eliminate both internal and external disturbances, enhancing system response speed and disturbance immunity. Second, a fractional-order PID controller is applied in the outer loop to achieve both speed and accuracy in positioning the electromagnetic actuators. Finally, experimental results demonstrate that the fractional-order PID combined with the fractional-order linear active disturbance rejection controller achieves excellent position-tracking performance and enhanced immunity to interference. In addition, it improves system stability and accuracy.