• Title/Summary/Keyword: Servovlave Wear

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A Study on In-Process Performance Diagnosis of Hydraulic Servovalves - First Report : Position Control System - (유압서보밸브의 인-프로세스 성능 진단에 관한 연구 I - 유압실린더 위치제어계의 경우 -)

  • Kim S.D.;Kim K.H.;Song J.S.;Ham Y.B.;Lee J.C.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.3 no.1
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    • pp.7-14
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    • 2006

  • In this paper, an in-process diagnosis method for performance of position control servo system was studied, which was based upon null bias, slew-rate ratio and delay time measurement. Slew-rate ratio and delay time were analyzed by theoretical analysis, computer simulation and experiment. As a result of these analysis, when spool of servovalve was weared, slew-rate ratio was decreased and delay time was increased.

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