Fault diagnose and tolerance technology for position detecting system based on dual resolvers

Position detecting system is the key unit of Control Moment Gyro(CMG). It's reliability is very important for CMG. The paper introduces a position detecting method based on two channel resolvers. Fault diagnosis and fault tolerance technology for position detecting system is proposed. Fault diagnose strategy is designed by utilizing Dependency matrix (D-matrix), whereas the fault-tolerant strategy is developed based on re-builder algorithm. Experiment results show that the proposed method is feasible and effective to promote reliability of the position detecting system.