Analysis and study on BIT false alarm of flight control system in the sensing layer

Based on the understanding of the flight control system of built-in test (BIT) structure, it gets a summary about the cause of the flight control system about generating false alarms, and analyzes the sensing layer during the information processing of the BIT system. Then put forward a method for sensor fault diagnosis which is based on observer in the sensing layer, then isolate the fault timely and prevent the false alarm, so as to reduce false alarm rate of the whole BIT system. It will improve the performance of BIT and promote the research of BIT false alarm.