基于等效载荷的故障诊断方法与现状

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (21) : 1-5.

论文

基于等效载荷的故障诊断方法与现状

李常有1 张义民1 王跃武2

作者信息 +

Fault diagnosis method based on equivalent external load and its current development

LI Chang-you1, ZHANG Yi-min1, WANG Yue-wu2

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文章历史 +

摘要

基于等效载荷的故障诊断方法将传统的基于信号分析的故障诊断方法与研究对象的线性动力学模型有机结合起来，根据监测的动力学响应，计算出实际的等效载荷(剩余位移)，然后在故障空间中搜寻对应的最佳理论等效载荷(剩余位移)，最终实现准确快速地诊断出设备的故障，为故障诊断领域提供一种新的思路。本文介绍了基于等效载荷的故障诊断方法的发展历史和优点，时域和频域方法的基本原理和诊断流程，在此基础上，分别从故障等效载荷模型、剩余响应的计算方法、故障判别的优化方法、故障判别精度指标、动力学建模精度较低的解决方法以及信号初处理等当前研究的问题进行了详细总结和概括，并对当前国内涉及该方法的研究成果进行了综述。通过分析当前的现状，给出基于等效载荷的故障诊断方法的未来发展方向。

Abstract

The fault diagnosis method based on equivalent external load is a new solution of the equipment fault diagnosis and makes full use of the advantage of the traditional fault diagnosis method based on signal analysis and the linear dynamic model of the research object. In the method, the actual equivalent external load (residual displacement) is calculated according to the monitored dynamics response and then is matched by an optimization algorithm in the theory fault space in order to identify the equipment fault quickly and accurately. Firstly, the development history and advantages of the fault diagnosis method based on equivalent external load are introduced and the basic principle and diagnosis flowchart of the discussed method in the time and frequency domain are presented. Next, the current development of almost all theory and technologies about the fault diagnosis method based on equivalent external load, such as equivalent external load model, calculation method of the residual response, optimization algorithm used to identify the fault, fault identification accuracy index, solution of the low accuracy of the formulated dynamic model, preprocess of the monitored signal and so on, are summarized. The research fruit of the discussed method at home is also reviewed. Finally, the future research subjects of the fault diagnosis method based on equivalent external load are suggested according to the analysis of the current development and the authors’ knowledge.

导出引用

李常有张义民王跃武 . 基于等效载荷的故障诊断方法与现状[J]. 振动与冲击, 2012, 31(21): 1-5

LI Chang-you;ZHANG Yi-min;WANG Yue-wu. Fault diagnosis method based on equivalent external load and its current development[J]. Journal of Vibration and Shock, 2012, 31(21): 1-5