基于多信号模型的综合化航电系统综合诊断算法设计

文佳

【期刊名称】《电讯技术》

【年(卷),期】2014(000)003

【摘要】针对现代航电系统综合化程度高、故障现象复杂多变、故障诊断能力不足的现状，分析了综合化航电系统的故障特征，总结了其故障诊断算法的设计要求，并在此基础上设计了基于多信号模型的故障综合诊断算法，具体包括：建立了算法的总体架构，针对机上LRU/LRM级、子系统级和系统级诊断以及在线诊断的特点分别设计了适用的诊断算法模块，特别针对子系统与系统级诊断，设计了防虚警处理算法、快速诊断算法和精确诊断算法，以解决航电系统机内测试设备( BITE)长期存在的虚警难题，满足不同BIT工作模式下故障诊断的要求；建立了多层次诊断架构下的综合诊断流程，规划了各诊断模块的组成、功能、工作原理和输入输出数据。梳理了综合诊断算法设计的工作项目及其接口关系，给出了航电系统集成研发模式下综合诊断算法的设计流程，为工业部门在研制阶段进行航电系统综合诊断算法的设计开发提供支持。%The failure mode and effect of highly integrated modern avionics system is so complex that the existing BITE’s ability is not qualified for fault diagnosis. The fault characteristic of integrated avionics sys-tem is analyzed and requirement to design its integrated diagnostic algorithm is summarized. In considera-tion of the advantage of multi-signal model on testability modeling and fault diagnosis, an integrated diag-nostic algorithm of integrated avionics system based on multi-signal model is presented. The framework of the integrated diagnostic algorithm is designed as well as the diagnostic algorithm for LRU ( Line Replace-able Unit)/LRM ( Line Replaceable Module) level, sub-system level and system level diagnosis. A false alarm prevention algorithm of sub-system level and system level diagnosis is designed to resolve false alarm problems of BITE ( Build in Test Equipment) . Quick diagnostic algorithm and precise diagnostic algorithm are designed to satisfy different diagnostic requirement of different BIT mode. Integrated diagnostic work-flow is presented as well as the composition, function, basic theory, input and output of each level’s diag-nostic model. The workflow and interface to design and develop the integrated diagnostic algorithm under current integrated development mode is presented for industry department.