Research on isolation method of spacecraft reaction wheels using electromagnetic shunt damping

Abstract

The spacecraft flywheel system is widely used in various space missions due to its cleanliness, high reliability and high control accuracy, such as spacecraft attitude control and large-angle turning maneuvers. However, current research agrees that the high-speed rotating flywheel system is one of the main sources of micro-vibration disturbances on spacecraft. In view of the variable speed characteristics of the flywheel, this paper proposes a new vibration isolation system based on Stewart vibration isolation platform and electromagnetic shunt damping (EMSD). Attempts to connect three circuits of pure resistance circuit, resistance-inductance circuit and resistance-inductance-capacitor circuit to the new vibration isolation system in order to improve the isolation performance. Through theoretical analysis and numerical simulation, the effect of circuit parameters on isolation performance of each circuit are studied. The results show that EMSD can significantly reduce the disturbance input of the flywheel, and frequency modulation can be achieved through the conversion circuit to avoid resonance.