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旋转机械故障诊断的自学习方法研究 总被引:1,自引:0,他引:1
分析并介绍了旋转机械故障诊断的模糊数学与专家系统相结合的诊断方法,提出了一种实用的自学习策略,用这一诊断方法在实验室对一双跨转子进行了两种常见故障的学习及诊断。并将该学习模块装入现场一台50MW汽轮发电机组的故障诊断专家系统中,经过多年运行,专家系统知识库得到不断完善。 相似文献
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针对单、双级耦合热泵系统结构的复杂性和运行模式的多样性,本文将分布式人工智能技术引入到该热泵系统的故障诊断技术研究中,提出一种适用于单、双级耦合热泵系统的分布式故障诊断专家系统,并深入研究该故障诊断专家系统的任务分解、各子任务的求解和各子任务的综合等关键问题。在此基础上,利用人工神经网络,实现专家系统内部各诊断模块的运行状态实时监测和故障快速推理,构建出单、双级耦合热泵分布式故障诊断专家系统的模型,为开发基于ANN的单、双级耦合热泵分布式故障诊断专家系统奠定研究基础。 相似文献
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蒋鸣雷 《中国新技术新产品》2011,(2):34-34
专家系统是应用人工智能技术和计算机技术,模拟人类专家的决策过程。将专家系统应用于汽车的故障诊断,是降低诊断成本,提高诊断工作效率和准确性的有效途径。此外还阐述了各种汽车故障诊断专家系统的优缺点。 相似文献
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神经网络在电路诊断中的应用 总被引:6,自引:1,他引:5
目的:阐述了目前电路基于数据库技术和人工智能专家系统及神经网络原理的故障诊断系统。方法:将所记录的模糊症状输入到系统中,通过模糊运算后,运用神经网络学习算法来寻找故障类型。结果:介绍了人工神经网络技术在电路诊断中的应用,并给出系统故障诊断软件的设计,结论:所用专家系统和神经网络相结合的方法改进电子电路故障诊断是可行的。 相似文献
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本文分析了目前在故障诊断专家系统知识库构造方面存在的问题,研究了大型旋转机械故障诊断领域知识的构成特点和表达形式。为了保证故障诊断知识库的通用性、管理与维护的方便性和可靠性,引入了面向数据流的软件设计思想,并利用这种思想构造了一个汽轮发电机组故障诊断专家系统的知识库管理系统。 相似文献
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首先介绍了单面瓦楞纸板机生产中常出现的故障诊断技术的基本内容,然后指出了单纯基于数据处理的各种传统诊断方法的缺点,进而探讨了专家系统方法用于系统故障论断的基本原理及其优越性,并概括介绍了SCR直流调速装置的故障诊断专家系统-SCSD以及SCSD的功能、特点及其模拟故障诊断实验结果。 相似文献
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本文阐述了复杂技术系统故障诊断特点,认为在复杂技术系统中对于故障的测试是一个有穷递归过程,根据这一特点我们采用专家系统方法进行故障诊断。文中提出测试是故障诊断过程中的基本元素,在复杂技术系统故障诊断模型的每一个结点所进行的“收集症状→检测→决策”是整个诊断过程的基础与驱动力。另外还论述了建造故障诊断专家系统过程中的一些技术问题。 相似文献
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SUNShou-qun ZHAOSan-xing ZHANGWei CHANGXin-long 《国际设备工程与管理》2003,8(2):80-87
The multi-fault phenomena are common in the turbo-rotor system of a liquid rocket engine.As it has many excellent qualities,the neural network might be used to solve the problems of multi-fault diagnasis of a turbo-rotor system.First,the feature expression of a common turbo-rotor fault was studied in order to build up the standard fault pattern and satisfy the need of neural network studying and diagnosing.Then.the turbo-rotor fault identification and diagnosis problems were investigated by using a BP(back-propaga-tion)neural network.According to the BP neural network problems,the parallel BP neural network method of multi-fault diagnosis and classification was presented and investigated.The results indicated that the parallel Bp neural network method could solve the turbo-rotor multi-fault diagnosis problems. 相似文献
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转子-轴承系统裂纹-碰摩耦合故障的非线性特性研究 总被引:5,自引:8,他引:5
研究了带有裂纹和碰摩耦合故障的弹性转子系统的复杂运动。在同时考虑轴承油膜力和碰摩发生时转静件间的相对速度对非线性摩擦力的影响基础上,构造了含有裂纹-碰摩耦合故障转子系统的动力学模型。针对短轴承油膜力和裂纹-碰摩转子系统的强非线性特点,本文用Runge-Kutta法对转子-轴承系统由裂纹和碰摩耦合故障导致的非线性动力学行为进行了数值仿真研究,发现该类系统在运行过程中存在周期运动、拟周期运动和混沌运动等丰富的非线性现象,研究结果为转子-轴承系统故障诊断、动态设计和安全运行提供了理论参考。 相似文献
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LIU Hai-rong XU Fei-yun 《国际设备工程与管理》2006,11(4):193-204
An intelligent machine is the earnest aspiration of people. From the point of view to construct an intelligent machine with self-monitoring and self-diagnosis abilities, the technology for realizing an internet oriented embedded intelligent condition monitoring and fault diagnosis system for the rotating machine with remote monitoring, diagnosis, maintenance and upgrading functions is introduced systematically. Based on the DSP ( Digital Signal Processor) and embedded microcomputer, the system can measure and store the machine work status in real time, such as the rotating speed and vibration, etc. In the system, the DSP chip is used to do the fault signal processing and feature extraction, and the embedded microcomputer with a customized Linux operation system is used to realize the internet oriented remote software upgrading and system maintenance. Embedded fault diagnosis software based on mobile agent technology is also designed in the system, which can interconnect with the remote fault diagnosis center to realize the collaborative diagnosis. The embedded condition monitoring and fault diagnosis technology proposed in this paper will effectively improve the intelligence degree of the fault diagnosis system. 相似文献
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The research and practice of CIMS and FMS has brought about a great development to ad-vanced manufacturing systems for decades.The experience of failure and success during the process of development is a revelation and reference for the design of a fault diangosis system.This paper focuses on its function of directing to the design of a fault diagnosis system in terms of the flexibility of the sys-tem,the humans importance in the system,and the design of a distributed system.In view of the tend-ency of CIMS and FMS, the article also states the principle that the new fault diagnosis system should be improved by enhancing hardware in software,remote Internet service,and sustainable development. 相似文献