分形理论在液压泵故障诊断中的应用  

Application of fractal theory to fault diagnosis for hydraulic pump

作　　者：王庆华[1] 张兴彪[1] 张洪朋[1] 孙玉清[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《大连海事大学学报》2004年第2期40-43,共4页Journal of Dalian Maritime University

摘　　要：针对液压泵故障诊断中特征提取上的瓶颈问题,提出了一种基于分形理论的液压泵故障诊断方法.以轴向柱塞泵为例,应用Matlab软件,通过建立液压泵壳体的振动模型,运用分形理论提取特征参数,进行液压泵故障分形诊断的研究.结果显示,壳体振动信号在一定的尺度范围内具有分形特征,不同的状态下关联维数是不同的,具有明显可分性.因此,关联维数作为液压设备故障诊断的敏感因子是可行的.这种方法简单、直观、易行,克服了传统方法分析上故障特征的提取、分析的困难.To overcome the difficulty of characteristic identification in the hydraulic pump fault diagnosis, this paper brings forward a new method of hydraulic pump fault diagnosis based on fractal theory. It takes example for axial piston pump, extracts the fault feature via fractal theory and studies fault diagnosis for hydraulic pump based on fractal theory, by establishing its hull vibration model under Maltab. The result indicates that the different correlation dimensions of vibration speed signals of hydraulic pump under different operating states and the correlation dimension is sensitive to hydraulic pump faults. The method is simple, intuitionistic and feasible. It greatly overcomes the difficulty of characteristic identification in traditional methods.

关 键 词：分形理论 液压泵 故障诊断 特征提取 

分 类 号：TH137.51[机械工程—机械制造及自动化] TP806.3[自动化与计算机技术—检测技术与自动化装置]