航空发动机火警检测及告警系统可靠性设计
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摘要
目前航空发动机火警检测及告警系统经常出现"有警不报"和"无警虚报"两种故障模式。介绍了火警检测及告警系统的组成部分及各部分的功能,分析了传统的火警检测及告警系统可靠性低的原因,针对该问题,提出了系统的优化设计理论,包括BIT设计、硬滤波设计、余度设计、软滤波设计及迟滞比较设计,并对每种设计的实现方法进行了详细阐述。根据"可靠度"参数的计算结果,优化设计的火警检测及告警系统的任务可靠性相比传统的火警检测及告警系统得到了极大的提升。
At present,aero-engine fire detection and alarm systems often have two failure modes: no fire alarm when there is fire,or fire alarm when there is no fire. This article describes the fire detection and alarm system components and functions of each part. The reason of low reliability of traditional fire detection and alarm system is analyzed. In view of this problem,the optimal design theory of the system is proposed,including BIT design,hardware filter design,redundancy design,software filter design and hysteresis comparison design. The implementation of each design is described in detail. According to the calculation results of the "reliability"parameter,the fire detection and alarm system's mission reliability optimized has been greatly improved compared with the traditional fire detection and alarm system.
At present,aero-engine fire detection and alarm systems often have two failure modes: no fire alarm when there is fire,or fire alarm when there is no fire. This article describes the fire detection and alarm system components and functions of each part. The reason of low reliability of traditional fire detection and alarm system is analyzed. In view of this problem,the optimal design theory of the system is proposed,including BIT design,hardware filter design,redundancy design,software filter design and hysteresis comparison design. The implementation of each design is described in detail. According to the calculation results of the "reliability"parameter,the fire detection and alarm system's mission reliability optimized has been greatly improved compared with the traditional fire detection and alarm system.
引文
[1]田永堂.飞机发动机火警探测系统设计浅析[J].测控技术,2015,34(7):125-127.
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[4]王明皓.飞机电磁环境效应的特性及控制[J].航空科学技术,2013,24(3):1-6.
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[6]陈超,李冰,司昕璐.基于迟滞比较器的双阈值稳压供电控制电路[J].探测与控制学报,2015,37(4):30-33.
[2]王宇.波音737NG飞机发动机过热/火警探测系统故障放行分析[J].航空维修与工程,2015(5):46-48.
[3]尹梅莉,田永堂.飞机发动机舱火警探测系统改进研究[J].航空科学技术,2014,25(12):35-38.
[4]王明皓.飞机电磁环境效应的特性及控制[J].航空科学技术,2013,24(3):1-6.
[5]葛晓菁,王骥.某机载设备虚警问题的原因分析及处理方法[J].航空电子技术,2015,46(2):53-56.
[6]陈超,李冰,司昕璐.基于迟滞比较器的双阈值稳压供电控制电路[J].探测与控制学报,2015,37(4):30-33.