局域波时频法在柴油机缸套活塞磨损诊断中的应用研究

Investigation on Diagnosis of Diesel Engine Piston-Liner Wear Faults Based on Local Wave Time-Frequency Approach

论述了局域波时频分析方法的基本理论及其特点 ,通过多种时频分析方法对线性调频信号聚集性的比较 ,说明了局域波时频法作为时频分析方法的可行性 ,并体现出此方法对非平稳信号进行分析的优点。提出了基于局域波时频分析的叉车柴油机缸套活塞磨损故障诊断方法 ,并对现场实测数据进行了分析 。

A fundamental theory and features about local wave time frequency approach are discussed at first.The advantages of local time frequency are displayed by contrasting with others of time frequency approaches.Meanwhile its feasibility as time frequency approach is proved.A fault diagnosis approach about diesel engine piston liner wear is presented based on local wave time frequency analysis.At last the validation of this approach is demonstrated on experimental data.The results show that the approach is right and useful to engineering.