某型机载远程接口单元上电启动高故障率问题分析  

Analysis of high failure rate of power-on starting for an airborne RIU

作　　者：李军[1] 车炯晖[1] 呼明亮 赵君[1] LI Jun;CHE Jionghui;HU Mingliang;ZHAO Jun(AVIC Computing Technique Research Institute,Xi’an 710065,China)

机构地区：[1]航空工业西安航空计算技术研究所,陕西西安710065

出　　处：《现代电子技术》2023年第4期135-138,共4页Modern Electronics Technique

基　　金：航空科学基金项目资助(2016ZC31004)。

摘　　要：远程接口单元(RIU)是航空电子系统的重要组成部分,在机载机电管理系统(UMS)中发挥着非常重要的作用。某型远程接口单元自使用以来,发生过多次上电启动时故障,严重影响飞机的出勤率和再次出动率。文中依据某型远程接口单元的故障现象和工作原理,以离散量输出接口上电BIT检测故障为顶层事件开展故障树分析,通过对故障树底层事件的逐条分析、测试,最终确定引起故障的原因;并根据故障机理制定相应的解决措施,开展相关验证工作。As an important part of avionics system,the RIU(remote interface unit) can play an important function in the airborne UMS(utility management system). Since the use of a RIU,there have been many failures during power-on starting,which have seriously affected the aircraft′ s attendance rate and re-dispatch rate. According to the fault phenomenon and the working principle of a RIU,the fault tree analysis is carried out by taking Power-On-BIT detection fault of discrete output interface as the top-level event. After the analysis and testing of the bottom-level event of the fault tree one by one,the cause of the fault is determined. The corresponding solutions are developed according to the fault mechanism,and relevant verification work is carried out.

关 键 词：机电管理系统 远程接口单元 上电BIT 离散量输出 系统复位 故障树分析 机理分析 测试验证 

分 类 号：TN911.23-34[电子电信—通信与信息系统] TP303[电子电信—信息与通信工程]