• Title/Summary/Keyword: 구동전류 동일화 루프

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Current Equation Loop Design of Muti-channel Direct Drive Valve Actuation (다중채널 직접구동 엑츄에이터의 구동전류 동일화 루프 설계)

  • Nam, Yoonsu
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.10
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    • pp.162-169
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    • 2000
  • A Direct Drive Valve(DDV) hydraulic actuation system which is commonly used as an aircraft's control surface driving actuator has multi-loop control structure to ensure its safety operation. However, because of not perfect matching of one self channel characteristics with the others, the servo valve driving current of each channel can be widely different. Therefore, the long-time use of DDV actuator without any correction of these channel current offsets will cause the problem of performance or life expectancy degradation due to unwanted heats in the linear motor. A current equalization loop structure which can minimizes current offsets between channels is introduced and designed. The performance of the current equalization loop is investigated and verified through the analytic and experimental ways.

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