飞机供电系统的改进型PHM方案

The Improved PHM Project Research on Power System of Aircraft

针对目前飞机供电系统中集中式PHM设计方案无法满足日趋复杂的供电系统要求这一问题,在对飞机供电系统进行扩展式FMEA分析及故障分类的基础上,为供电系统设计了分布—集中式PHM系统,并采用了基于扩展FMEA分析和模糊综合评判的诊断预测模型,最后将供电系统PHM很好地融入到飞机原有的总体PHM系统中,具有一定的实用价值,为后续供电系统PHM系统开发研究提供参考。

The application of PHM can greatly help improve the dependability,the efficiency of maintenance,the advance of fault diagnosis and the capacity of fault tolerance of power system of More-Electric Aircraft.Since the traditional use of PHM in power system of More-Electric Aircraft is the concentrated project,in which the power system is looked as a segment system of aircraft function management area,the equipments have no PHM and the signals of the equipments are given to the PHM of function management district,which can not fulfill the needs of complicated power system.Based on analyzing the augmented-FMEA and sorting the faults,this paper designs a focus-distributing PHM system,adopts the augmented-FMEA and the prognosticating model of the fuzzy comprehensive evaluation and finally combines the power system PHM with the aircraft PHM properly.All the tasks done in this paper are of some practical value and thinking innovation,which decide the direction for the research and development of power system PHM.