Journal of Shandong University(Engineering Science) ›› 2018, Vol. 48 ›› Issue (4): 88-93.doi: 10.6040/j.issn.1672-3961.0.2017.616

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Design and experiment of cascade PID control for Maglev actuator

WU Huachun1,2, XIE Siyuan1, CHEN Changhao1   

  1. 1. School of Mechanical and Electrical Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China;
    2. Hubei Provincial Engineering Technology Research Center for Magnetic Suspension, Wuhan 430070, Hubei, China
  • Received:2017-09-14 Online:2018-08-20 Published:2017-09-14

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Abstract: In order to improve the stability of the active vibration isolation system and improve the control quality of the system, the mathematical model of the control channel of the Maglev actuator was obtained by the system identification and the corresponding cascade PID controller was designed. The inner loop of the system was the acceleration loop, which mainly controlled the acceleration of the vibration isolator. The main loop of the system was the position loop, which made the isolator back to the center position and adjusted the reference value of the acceleration controller. The dynamic performance of cascade PID control was theoretically analyzed by the first order system theory; the theoretical results were verified by the establishment of a cascade PID simulation control model in Matlab. Then cascade PID control system was designed by the single degree of freedom experimental platform; the experiment and simulation of acceleration transfer rate was compared; the effect of acceleration control was analyzed. The experimental results showed that the cascade PID control method could make the attenuation range of the control object in the range of 1~25 Hz frequency between -22.5 dB and -2.2 dB, achieved effective vibration control.

Key words: active vibration isolation, Maglev actuator, system identification, dynamic performance analysis, cascade PID control

CLC Number: 

  • TP13
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