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Acta Armamentarii ›› 2020, Vol. 41 ›› Issue (8): 1529-1538.doi: 10.3969/j.issn.1000-1093.2020.08.007

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Servo Control of Fast Steering Mirror Based on Fuzzy Control Strategy

GAO Xinyang, KE Fang, ZOU Wei, YU Xiao, YUAN Jia   

  1. (South-West Institute of Technical Physics, Chengdu 610041, Sichuan, China)
  • Received:2019-08-15 Revised:2019-08-15 Online:2020-09-23

Abstract: The servo control performance is the precondition to ensure precise tracking. A control method is studied to improve the servo performance of fast steering mirror(FSM). A fuzzy controller combining fuzzy control strategy with PID structure is proposed for the servo loop of fast steering mirror. The controller not only has the advantages of PID which is easy to implement in engineering, but also possesses the characteristics of self-adaption adjustment of control parameters. It's better adapted to various operating conditions. A fuzzy controller is designed based on the fast steering mirror of a high frequency swing motor for simulation experiment, and is compared with the existing scheme based on the traditional PID control. The servo performance of the fast steering mirror was simulated under the actual working condition. The simulated results show that the fast steering mirror based on the fuzzy control strategy increases the suppression bandwidth from 50 Hz to 120 Hz, and compresses the steady-state root mean square error in case of random input signal from 12.996″ to 1.620″, thus the feasibility and effectiveness of using the fuzzy control strategy to improve the servo control performance of FSM are verified; the FSM based on fuzzy control can be used as the subsystem part of the high-precision compound axis servomechanism in tactical laser weapons and other beam orienting occasions requiring microradian tracking accuracy.

Key words: faststeeringmirror, fuzzycontrol, servoperformance, suppressionbandwidth

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