某型涡喷发动机状态监控与主要故障诊断系统方案

某型涡喷发动机技术水平低,可靠性和使用维修性差。在飞行过程中,时有喘振、超降转,自动停车等严重故障发生,地面又常常不能再现,难以分析故障原因,更谈不上预测故障。研制和发展状态监控与故障诊断技术,对模清故障的原因及规律,及时预报故障,避免大事故是必要的。它还可以提供机件使用情况的信息,以利由定时维修过渡到视情维修。

A SCHEME OF CONDITION MONITORING AND MAIN FAULTS DIAGNOSING SYSTEM FOR A TURBOJET ENGINE

In order to enhance the ability of diagnosing faults and improve maintenance,we develop a condition monitoring and main faults diagnosing system for a turbojetengine. The whole system is divided into two sub-systems, the engine operationmonitoring and the ground computer data processing. The former is used for analysing engine performance tendency and diagnosing some main faults in the engine, i.e., engine-surge, exceeding drop rpm, auto-flameout and ;so on. Inaddition, it can record the parameters at take-off or before and after fault occurs. When faults take place in the engine, it can also give pilots warning. The latter is used for analysing reasons of faults and estimating engine performance tendency.