Research on Diesel Engine Piston Wear Fault Diagnosis Method Based onthe Local Wave Time-frequency Analysis

摘要

A large number of non-stationary dynamic signals are generated in the working machinery and equipment. Especially,diesel engines often encounter non-stationary transient and time-varying modulation signals, such as the impulseresponse signals caused by cylinder piston wear. These kinds of signals generated from diesel engine are analyzed by themethod of the Local Wave time-frequency proposed in this paper, and then according to the analysis to diagnose theworking state of the diesel engine. It proved that the proposed method is feasible and effective. Moreover, it provides aneffective way for the diesel engine condition monitor and fault diagnosis.