Clearance parametric identification and test method for a control actuator system based on Hilbert transformation

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 262-266.

SHI Xiaoming1, DOU Yibin1, MEI Xinglei1, XU Quan1, TAO Jian2

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Abstract

To identify clearance parameters of a control actuator system, a test device with adjustable clearance was designed to simulate clearance of a control actuator system’s transmission mechanism.Static load was exerted on it and sudden unloading made it have free vibration.The free vibration analysis method based on Hilbert transformation was used to obtain its double-fold line elastic force curve, and its clearance parameters were identified.This method was applied in clearance identification of control actuator system of an actual aero-craft.It was shown that vibration data acquired with the proposed test method have good signal-to-noise ratio; the proposed method’s engineering evaluation results are more secure; it has a good applicability for small control actuator systems.

Key words

clearance / Hilbert transformation / control actuator / nonlinear system identification

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SHI Xiaoming1, DOU Yibin1, MEI Xinglei1, XU Quan1, TAO Jian2. Clearance parametric identification and test method for a control actuator system based on Hilbert transformation[J]. Journal of Vibration and Shock, 2020, 39(5): 262-266

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