Lead-Lag Controller Design of Direct Drive Servo Valve Using Complex Method

컴플렉스법에 의한 직접구동형서보밸브의 진상-지상 제어기 설계

  • 이성래 (건양대학교 기계공학과)
  • Published : 2004.11.01


Direct drive servovalve(DDV) is a kind of one-stage valve because the main spool valve is directly driven by the DC motor. Since the structure of DDV is simple, it is less expensive, more reliable and offers reduced internal leakage and reduced sensitivity to fluid contamination. However, the flow force effect on the spool motion is significant such that it induces large steady-state error in a step response. If the proportional control gain is increased to reduce the steady-state error, the system becomes unstable. In order to satisfy the system design requirements, the lead-lag controller is designed using the complex method that is one kind of constrained direct search method.


Direct Drive Servo Valve;Lead-Lag Controller;Complex Method;Constrained Direct Search


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