导航计算机板自动测试系统实现研究

发布时间：2018-06-16 09:22

本文选题：导航计算机 + 测试系统　；参考：《南京航空航天大学》2016年硕士论文

【摘要】：嵌入式导航计算机是捷联惯性组合导航系统中的核心功能单元,负责解算导航数据、输出导航结果。为了满足导航计算机在生产和日常使用过程中较高的可靠性要求,对导航计算机硬件进行测试和维护,本文研究基于FMEA的导航计算机智能诊断自动测试系统。本文对导航计算机的测试需求和系统FMEA进行分析,提出了具有智能故障诊断功能的导航计算机测试系统方案,设计了软件测试流程并对测试系统的可测试性进行了验证。论文分别从元器件级、功能电路级和板级三个层次对系统故障模式及其影响进行分析。首先采用功能分析法将系统划分为功能模块,结合实际使用中的常见故障原因对功能模块的性能预期与故障表现进行了详细研究,得到元器件级、功能电路级和板级的FMEA表格,在此基础上建立故障模式之间的故障树模型。论文设计了导航计算机测试系统的整体方案,阐述了硬件平台组成以及相应的性能指标要求,软件将测试流程分为四个阶段分别为测试准备阶段、数据通讯接口功能测试、板级故障检测和导航性能在线检测,对应每一阶段的测试内容设计测试逻辑。根据测试所获得的系统故障信息构建导航计算机故障树模型作为测试系统故障诊断的依据。针对系统在使用过程中常见的故障模式,设计注入故障。对测试系统的可测试性和故障诊断功能进行了验证,测试系统通过静态实验和动态实验对导航计算机的导航解算性能进行检测。测试结果表明系统满足测试需求。
[Abstract]:The embedded navigation computer is the core functional unit of the strapdown inertial integrated navigation system. It is responsible for solving the navigation data and output navigation results. In order to meet the high reliability requirements of the navigation computer in the process of production and daily use, the navigation computer hardware is tested and maintained. The navigation computer based on FMEA is studied in this paper. This paper analyzes the testing requirements of the navigation computer and the system FMEA, puts forward the scheme of the navigation computer test system with the function of intelligent fault diagnosis, designs the software test process and verifies the testability of the test system. The text is from the component level, the function circuit level and the board, respectively. The system fault mode and its influence are analyzed at three levels. First, the function analysis method is used to divide the system into functional modules, and the performance module's performance expectation and fault performance are studied in detail in combination with the common fault causes in actual use. The FMEA form of component level, functional circuit level and board level are obtained, and the basis is based on this basis. The whole scheme of the navigation computer test system is designed in this paper. The composition of the hardware platform and the requirements of the performance index are described. The software is divided into four stages, which are test preparation stage, data communication interface function test, board level fault detection and navigation performance. According to the system fault information obtained by the test, the fault tree model of the navigation computer is constructed as the basis for the fault diagnosis of the test system. The design injection failure is designed for the common fault mode in the use process. The test and fault diagnosis work of the test system is used. It can be verified. The test system detects the navigation computing performance of the navigation computer through static and dynamic experiments. The test results show that the system meets the test requirements.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V247.11

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