某型航空发动机转速信号故障分析

某型航空发动机在地面台架试车的起动过程中,发生高压转子转速信号误报,造成起动失败;在外场装机地面试车时,在起动和停车过程中,发动机参数记录系统和EPI组合显示仪表显示出高压转子转速信号跳变。对发动机转速测量系统的工作过程进行分析,找到了该转速信号故障发生的原因,并提出了解决措施。

Failure Analysis of Speed Signals for an Aeroengine

There was some misinformation about high pressure rotor speed signals of an aeroengine during starting of the ground rig testing,that resulted in the engine starting failures.Aeroengine parameter record system and EPI combined display instrument showed signals jump of high pressure rotor speed in the course of starting and shutdown during the field test.The operation process of the aeroengine speed measuring system was analyzed and the failure reasons of the speed signals were found and the solutions were presented.