基于FMEA的飞机空调系统故障诊断与仿真

为保证飞机空调系统安全可靠运行,针对飞机空调系统各主要部件进行了故障模式影响分析(failure mode and effects analysis,简称FMEA),并结合故障树分析(fault tree analysis,简称FTA)方法,对飞机空调系统故障进行了诊断实验。同时利用Matlab/Simulink软件建立了各部件的数值仿真模型,搭建了空调系统故障仿真平台,给出了系统关键部件的故障判据,对飞机空调系统进行了故障仿真,将实时数据与得到的仿真结果对比可以得出故障检修排序。以飞机座舱温度异常故障为例,阐述了飞机空调系统故障诊断方法。结果表明,涡轮故障时对座舱温度影响最大,在设计和维修中应重点考虑。

Fault Diagnosis and Simulation of Aircraft Air Conditioning-System Based on FMEA

In this paper, in order to ensure the safety and reliability of the aircraft conditioning system, the failure mode and effects analysis(FMEA) of the main parts of aircraft air conditioning system is carried out. The whole air conditioning is simulated by Matlab/Simulink, and the failure diagnosis criteria of the key parts of an air conditioning system are regulated. Then, the abnormal cabin temperature of the aircraft is taken as an example to demonstrate the fault tree analysis method (FTA). The results show that the failure of the turbine has the largest influence on the abnormal cabin temperature, which should be took into serious consideration when it comes to the work of design and maintenance.