故障诊断试验系统设计----故障模拟[设计、开题、综述]

BI YE SHE JI

（二零届）

故障诊断试验系统设计----故障模拟

所在学院

专业班级测控技术与仪器

学生姓名学号

指导教师职称

完成日期年月

摘要

在流程工业生产中，对工业设备进行状态监测和故障诊断是非常有必要的。但是，随着现代工业过程系统大型化和复杂化的快速发展，传统的故障诊断技术已经难以满足复杂分布式设备的诊断要求。因此，人们迫切需要找到适合当前形势的故障诊断方法，用以提高系统的可靠性与安全性。

多级流模型(MFM，Multilevel flow models)是系统目标和功能的图形化，对真实的物理系统以物质流、能量流、信息流的角度进行抽象，把系统目标和功能及其之间的关系通过图形符号来表达的模型。作为一种功能模型，MFM通常比相应的面向事件的模型更简单，并且对系统的描述更加完全，能显著地减少计算量，因而在实时性要求很高的故障诊断中具有明显的优势。

本论文研究的主要内容及章节安排如下:

第一章论述了流程工业设备故障诊断的重要意义；阐述了流程工业设备故障诊断的研究现状；综述了MFM建模与故障诊断方法的研究现状与发展；分析了MFM在系统故障诊断应用中的优势,给出了本论文的主要研究内容。

第二章介绍了MFM建模的基本概念和原理；研究了MFM的建模方法，也概要介绍了基于MFM的故障诊断，最后建立了供水系统的MFM简化模型。

第三章是本次毕业设计的最主要部分，本章分析了供水试验台的各部分元件的功能、目标，具体提出了基于MFM的故障模拟方案设计，包括硬件电路设计、元器件的选取等。

第四章对全文进行了总结，并对未来展望提出了一些设想。

关键词：多级流模型，故障诊断，故障模拟

The Design of Fault Diagnosis Trial System---Fault Analog

Abstract

In flow industrial production，it is important to care on the condition monitor and the failure diagnosis to the industrial equipment. But, Along with the fast development of modern industry process system large scale and complication, the traditional failure diagnosis technology is difficulty to satisfy the complex distributional equipment's diagnosis request. Therefore, the people anxiously needed to find the failure diagnosis method to suit the current situation.

Multilevel flow models, the graphic form of system objectives and functions, the abstraction of genuine physical system from the perspectives of material, energy and information flow. Serving as the model that expresses system objectives and functions and their relations through grahpic symbols. Serving as a functional model, MFM is easier than event-oriented model with more complete system description, capable of reducing amount of calculation remarkably. Therefore, it has obvious advantage in malfunction diagnosis with exigent Real-time.

The main contents are as follows:

The first chapter discussed the significance of fault diagnosis in process industry, described the development history and current status on fault diagnosis in process industry, reviewed the development and current status of MFM, and comparatively analyzed the advantages of MFM in the system fault diagnosis. Finally, the main contents and the overall framework of the thesis were presented with the specific requirements of scientific research projects.

The second chapter introduced the basic principles and the related concept of MFM, studied the method of modeling MFM, also introduced fault diagnosis based on MFM summarily, at last, built MFM of a water supply system.

The third chapter is the most important part of the graduation project, this chapter analyzed function and goal of each physics element which from the water supply system, present project design of the fault analog which based on MFM, included hardware-circuit designed, chose component and so on.

The fourth chapter sums up the work of the dissertation and presents conclusion and prospect.

Keywords: Multilevel flow models, fault diagnosis, fault analog