Real Time Aerospace Control Fault Diagnosis System Based on Testability Model

Along with growing complexity of aerospace control system, the method of extracting fault symptoms at realtime and making accurate warning during the test and launch process is very important to improve space system reliability and security. Via FMEA Analysis, the relationship between potential failure modes and test points of aerospace control system is achieved, which forms the testability model. In this paper, a real-time fault diagnosis system based on testability model is proposed, which discretizes the real-time data stream, captures the test points state of the model and uses the optimized algorithm to trace the failure modes, completes fault diagnosis reasoning while locating the failure isolation units. This system greatly improves the reliability and security of the aerospace system.