针对国内大型民用飞机主飞行控制计算机故障繁多、故障难以检测以及计算机系统复杂等诸多问题入手分析,通过介绍主飞行控制计算机内部部件的主要功能以及故障模式,对飞机的主飞控制系统(BIT)在完成飞行任务这一过程中,以及其在不同阶段的具体检测内容都做了分析,并对其核心部件给出了可靠的自检测方法。 Aimed at many problems of the main flight control computer of domestic large-scale commercial aircraft, such as many faults, hard to detect faults and complicated computer system, this paper introduces the main functions of the main flight control computer’s internal components and the fault modes, analyzes the main flight control system (BIT) In the process of completing the mission, as well as its specific testing content in different stages are analyzed, and its core components are given reliable self-test method.