Study on Feasibility of Hybrid Fault Diagnosis system

混合故障诊断系统的可行性研究

• 批准号: 02555189
• 负责人: MATSUYAMA Hisayoshi
• 金额: $ 2.11万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555189/
• 关键词: Fault Diagnosis; Safety Management; Fault Management; Expert System; Operating Support; Decision Making Support; エキスパ-トシステム; 防災; 安全; 自動化; 無人化

1. Design of hybrid fault diagnosis system (1) A method of basic design of hybrid fault diagnosis system has been established. The basic strategy comprises two-levels. The upper-level consists of model-based fault diagnosis algorithm. The lower-level consists of knowledge-based or data-based fault diagnosis algorithm. (2) A method to estimate the greatest sets of candidates, which should be prepared for detailed design of hybrid fault diagnosis system, has been developed for using the fault diagnosis algorithm based on the signed directed graph as the upper-level strategy. (3) An example of the practical application of the method developed in (2) was presented for an oxidation subprocess of an acetic acid process.2. Performance analysis of hybrid fault diagnosis system (1) The hybrid fault diagnosis system was implemented on the personal computer. Simulations were performed for a various types of faults caused in an oxidation subprocess of an acetic acid process to evaluate the speed and the diagnostic accuracy of the proposed hybrid system. (2) Also, the speed and the diagnostic accuracy of the proposed hybrid system were evaluated by experiments u sing a tank-pipeline system, where blockages and leakages were generated. (3) As to the speed, diagnoses were completed within about 120 seconds in both cases of simulations and experiments by using a personal computer. As to the accuracy, every real cause considered in the simulations and experiments were identified correctly. As a result, the proposed hybrid fault diagnosis system can be applied to practical plants.

1 混合故障诊断系统的设计 (1) 建立了混合故障诊断系统的基本设计方法。基本策略包括两个层次。上层由基于模型的故障诊断算法组成。下层由基于知识或基于数据的故障诊断算法组成。 (2)以基于有向图的故障诊断算法为上层策略，开发了一种估计最大候选集的方法，为混合故障诊断系统的详细设计做好准备。 (3)给出了(2)中开发的方法在乙酸工艺的氧化子过程中的实际应用实例。2．混合故障诊断系统的性能分析 (1)混合故障诊断系统在个人计算机上实现。对乙酸工艺氧化子过程中引起的各种类型的故障进行了仿真，以评估所提出的混合系统的速度和诊断准确性。 (2) 此外，通过使用发生堵塞和泄漏的储罐管道系统的实验来评估所提出的混合系统的速度和诊断准确性。 (3)关于速度，使用个人计算机进行的模拟和实验均在约120秒内完成诊断。至于准确性，模拟和实验中考虑的每个真实原因都被正确识别。因此，所提出的混合故障诊断系统可以应用于实际工厂。