基于局域波法的时频局部能量特征提取方法

A Method for Feature Extraction of Local Energy in Time-frequency Domain Based on Local Wave Approach

在故障诊断中,特征参数的选择尤其重要,而局域波法的引入拓广了特征参数的选择途径。在局域波时频分析理论的基础上,引入了时频局部能量的概念,进而提出了一种基于时频平面的局部能量特征提取方法。以柴油机缸套活塞磨损故障的诊断为例,说明了时频局部能量特征提取方法的有效性。

In this paper, a new feature extractionmethod based on local energy in time--frequency domainwas given. The concept of local energy in time--frequency domain, based on local wave theory, was used to mea-sure the signal energy in certain frequency and certain pe-riod. The proposed feature extraction method was testedon Diesel engine piston--liner wear estimation. The re-sults showed that the developed approach was effective.