Investigation on Microvibration Induced by Reaction Wheels

Mankour Abdeljelil

《中國機械工程學刊》 41卷3期 (2020/06) Pp. 325-335

摘要

Reaction Wheel Assemblies are actuators commonly used for satellite attitude control. During their functioning RWAs produce undesired disturbances transmitted through satellite structure and can significantly affect the performance of vibration-sensitive payload. Microvibrations of a satellite reaction wheel assembly are commonly analysed in either hard-mounted or coupled boundary conditions, though coupled wheel-to-structure disturbance models are more representative of the real environment in which the wheel operates. Micro-vibration is a phenomenon that affects the payload pointing. In this article we want to investigate a solution to damp and decouple the moving part to a soft mounting on the structure that supports the wheels. A couple of core honeycomb plate thickness and mounting stiffness were analyzed to access their damping efficiency on microvibration source. Simulations show that the isolation is effective for micro-vibration suppression and issues about micro-vibration in integrated design are identified.

關鍵字

Microvibration ； Reaction wheel ； Transfer function ； Honeycomb plate