Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 1994.10a
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- Pages.360-364
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- 1994
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- 2005-8446(pISSN)
Non-Invasive Diagnostic Singature Extraction for Motor-Operated Valves
모터 구동 밸브의 비침투 진단 신호 추출에 관한 연구
Abstract
This paper is concerned with extracting the diagnostic signature for motor-operated valves (MOV's) noninvasively. A torque estimator is developed and tested to obtain electical torque of the induction motors which are attached to the MOV's. Inverse filter is used to recover the gear meshing forces from the measured actuator housing vibration, which contain the gear rotation information. Frequency demodulation techniques are performed and an adaptive linear bandpass filter is implemented to improve signal-to-noise ratio. Finally, stand-alone valve experiments are carried out to validate the signature extraction scheme.
Keywords