Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (4): 487-491.DOI: 10.12068/j.issn.1005-3026.2018.04.007

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FAST Node Displacement Control Method Using Self-Tunning Fuzzy PID Control

SHA Yi1, FAN Qian-wen1, ZHANG Li-li1, ZHU Li-chun2   

  1. 1. School of Computer Science & Engineering, Northeastern University, Shenyang 110169, China; 2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China.
  • Received:2016-11-22 Revised:2016-11-22 Online:2018-04-15 Published:2018-04-10
  • Contact: SHA Yi
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Abstract: To solve the problem of achieving the expected moving position of more than 2400 nodes under the influence of the tension of adjacent points, wind, temperature and other factors, FAST node displacement control method was studied by using the self-tuning fuzzy PID combined with the improved scheme of variable domain scaling. By analyzing FAST node hydraulic actuator servo system, a transfer function of the controlled object was obtained. The controller was designed by analyzing the error and its corresponding rate of change, and feasible and effective variable domain scaling factor was chosen. The improved algorithm was modeled and simulated by Simulink. The results showed the feasibility of self-tuning PID control based on the variable domain for the FAST node displacement control.

Key words: FAST node displacement, self-tuning PID control, fuzzy control, variable domain

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