基于Lyapunov指数分析的液压泵故障诊断方法研究  

Hydraulic Pump Fault Diagnosis Method Based on Lyapunov Exponent Analysis

作　　者：姜万录[1] 张焰明[1] 王海军[1] 

机构地区：[1]燕山大学重型机械流体动力传输与控制实验室,河北秦皇岛066004

出　　处：《机床与液压》2008年第3期183-184,124,共3页Machine Tool & Hydraulics

基　　金：河北省教育厅博士基金项目(B2004128)

摘　　要：提出了一种基于最大Lyapunov指数分析的微弱信号检测新方法,依据该方法对柱塞泵的脱靴故障进行了实验诊断。实验结果表明,故障压力信号的最大Lyapunov指数比无故障时的正常信号的小,可以作为故障发生与否的定量判据,为旋转机械故障诊断提供了一条新途径。A new method for the weak signal detection was proposed which is basded on the largest Lyapunov exponent analysis, and piston pump fault of boot was tested by this method. Experimental results show that the largest Lyapunov exponent of fault pressure signal is smaller than the normal pressure signal. This conclusion can be a good quantitative evidence of whether fault occurs or not, which provides a new way for rotating machinery fault diagnosis.

关 键 词：故障诊断 混沌理论 LYAPUNOV指数 液压泵 

分 类 号：TH137.51[机械工程—机械制造及自动化]