Abnormity analysis of speed response time in the <?A3B2 pi6?>semi-physical simulation test

<bold/>For a type of aircraft turbofan engine control system, aiming at problems of inconsistency of the engine speed response time in different semi-physical simulation testers, and that of different devices in the same tester, the mechanism analysis of engine speed control loop was carried out, based on the basic composition and working principle of the semi-physical simulation test of the control system. The fault tree covering the speed control loop was established; the fault probability of each link and the difficulty of troubleshooting were considered comprehensively; the main influencing factors are located, and a reasonable and effective troubleshooting scheme was formulated. The results show that the model computer multimedia timer is not accurate, which affects the operation of the model computer software and causes abnormality in the engine speed response time. The problem of inconsistent response time of engine speed was solved by verifying effective measures. The summary of the troubleshooting experience provides reference for the subsequent semi-physical simulation test equipment requirements.