阮磊;孔令梅;
1:济南热电有限公司
2:山东圣翰财贸职业学院
摘要：振动信号的测量和分析是一种有效的无损检测发动机故障的方法,本文利用缸盖表面振动信号实现了各缸燃烧差异的快速诊断。为了便于提取故障特征信息,根据发动机的工作过程编写了模拟软件,来区分各激励源。利用时频分析的方法对一个工作循环内的信号进行处理,通过对比时频域上各缸信号的特征来提取故障特征信息。发动机的拆解检验表明,诊断的结果准确,另外这种特征信息提取的方法不需要建立数据库,通过对比各缸的同类信号即可实现,简单易行。
关键词： 振动信号;;燃烧差异;;时频分析;;故障诊断
Abstract: As for non-destructive test
method,vibration signals are measured and analyzed to diagnose efficiently
engine troubles.This paper introduces an application based on cylinder head
vibration signal to diagnose differences of combustion pressure between
cylinders.In order to get failure information conveniently,a simulation program
which is used to distinguish the excitation sources is made according to the
operating principle of the engine.Time-frequency analysis method is used to
analyze the data that is sampled in one work cycle as to get the failure
information of the engine through contrast to the signal characteristics in the
time-frequency domain.The results verify that the diagnosis is correct after
the engine is disassembled and inspected.In addition,database is not required
because information is received by treatment to signals from cylinders.
Keywords: Vibration Signal;Combustion
Distinction;Time-frequency Analysis;Failure Diagnosis
参考文献：
[1]J.Ben-Ari,G.deBottom,R.Itzhaki,E.Sher.Fault.Detectionin
Internal Combustion Engine by the Vibrations AnalysisMethod.SAE 1999-01-1223.
[2]Autar,R.K.An Automated Diagnostic Expert
System forDiesel Engine.Engineering for Gas Turbines and Power.
[3]Gideon Goldwine,Gal deBOTTOM,Boris Rivin
and EranSHER.Assesment of The Quanlity Of Combustion InCompression Ignition
Engines Through Vibration SignatureAnalysis.FISITA World Automotive
Congress,BARCELONA2004.
[4]刘世元,杜润生,杨叔子.柴油机缸盖振动信号的小波包分解与诊断方法研究[J].振动工程学报,2003,(13)4.
[5]Fault Detection in Internal Combustion
Engine by the VibrationAnalysis Method.J.B.Ari,G.Bottoo,R.Itzhake and
E.Sher.SAE 99011223.
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