人工智能交换与服务标准IEEE1232研究及其故障推理机工程实现

发布时间：2018-07-18 10:16

【摘要】：故障诊断是模拟电路自动测试的关键环节,是评定一个自动测试系统的重要依据。而传统故障诊断系统诊断模块可移植性差,诊断知识难以移植,使故障诊断系统的开发效率难以提高。为实现诊断知识的可共享性和诊断模块的可移植性,本文利用IEEE1232标准对诊断数据和诊断模块进行规范,开发了基于IEEE1232标准的故障诊断软件,使得诊断数据和诊断模块能够在支持IEEE1232标准的系统间进行共享和移植。本文开发的故障诊断软件主要有三个部分构成,分别是故障树的自动建立模块,模型文件生成模块和故障推理模块。首先,在对故障电路进行深入分析的基础上,采用基于元件小故障树的自动建树方法,确定系统顶事件和故障结构,使用数据库建立元件小故障树,并利用故障系统元件的逻辑关系建立起整个系统的故障树。诊断数据的可共享性是通过将诊断数据转换成符合标准的交换文件实现的。IEEE1232标准为交换文件指定了两种文件格式标准,分别是ISO 10303-21:1994标准和ISO 10303-28:2007标准。为进一步实现诊断知识的共享性,本文对两种标准的交换格式都进行了实现。为完成故障诊断,本文按照IEEE1232标准对故障推理机的定义,开发了故障推理模块,利用上一步生成的标准格式的交换文件,对故障系统进行诊断,定位出故障信息。并开发了推理客户程序,实现与测试环境的交互。最后,通过将故障诊断系统整合到自动测试系统中,利用人为设置故障的电路对系统进行验证。经验证发现,本文开发的系统能够正确建立系统的故障树图,生成有效的交换文件,并利用故障推理模块成功地定位出故障信息。故障诊断的各个功能部分都达到了预期的目标。
[Abstract]:Fault diagnosis is the key to automatic testing of analog circuits and an important basis for evaluating an automatic test system. However, the traditional fault diagnosis system has poor portability and difficulty in transplanting diagnosis knowledge, which makes it difficult to improve the development efficiency of fault diagnosis system. In order to realize the sharing of diagnosis knowledge and the portability of diagnosis module, this paper uses IEEE1232 standard to standardize diagnosis data and diagnosis module, and develops fault diagnosis software based on IEEE1232 standard. The diagnostic data and diagnostic module can be shared and ported among the systems supporting IEEE1232 standard. The fault diagnosis software developed in this paper consists of three parts: the automatic building module of fault tree, the module of generating model file and the module of fault inference. First of all, based on the deep analysis of the fault circuit, the automatic tree building method based on the component small fault tree is adopted to determine the top event and fault structure of the system, and the component small fault tree is established by using the database. The fault tree of the whole system is established by using the logic relation of the components of the fault system. The shareability of diagnostic data is realized by converting diagnostic data into standard interchange file. The standard of .IEEE1232 specifies two file format standards for the exchange file, namely ISO 10303-21: 1994 standard and ISO 10303-28: 2007 standard. In order to further realize the sharing of diagnostic knowledge, the two standard exchange formats are implemented in this paper. In order to complete fault diagnosis, according to the definition of fault inference machine in IEEE1232 standard, a fault reasoning module is developed in this paper. The fault system is diagnosed and fault information is located by using the exchange file of the standard format generated by the previous step. The reasoning client program is developed to realize the interaction with the test environment. Finally, the fault diagnosis system is integrated into the automatic test system, and the system is verified by artificial fault circuit. It is found that the system developed in this paper can correctly set up the fault tree diagram of the system, generate an effective exchange file, and use the fault reasoning module to locate the fault information successfully. Each function part of fault diagnosis has achieved the expected goal.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52;TN710

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