万向传动轴动不平衡动态检测的小波能量主元法  

DYNAMIC DETECTION OF THE DYNAMIC IMBALANCE WITH CARDAN SHAFT APPLYING WAVELET SCALE ENERGY PRIMARY ELEMENT ANALYSIS

作　　者：丁建明[1] 林建辉[1] 王晗 黄晨光[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]青岛四方机车车辆股份有限公司高速列车系统集成国家工程实验室,青岛266111

出　　处：《机械强度》2014年第4期487-491,共5页Journal of Mechanical Strength

基　　金：国家高技术研究发展计划(863计划)(2011AA110501);自然科学基金重点项目(61134002);"十一五"国家科技支撑计划项目(2009BAG12A01)~~

摘　　要：提出一种高速列车万向轴动不平衡车载动态检测的新方法。该方法的核心是:对万向节安装机座的振动信号进行谐波小波包分解,提取前19个小波尺度能量形成特征向量,分别统计动平衡、动不平衡万向轴在不同转速条件下振动信号的特征向量而构成主元分析的训练样本,以累积方差贡献量大于0.8作为主分量个数的确定准则,将特征向量从19维降低到2维,应用第一主元和第二主元联合区分万向轴的动不平衡状态。应用台架试验数据对该方法的有效性进行了测试验证,结果表明:该方法能够有效辨别万向轴的不平衡状态,其准确性高,具有一定的工程适应性。A new method of detecting dynamic imbalance with cardan shaft is proposed applying wavelet scale energy primary element analysis. The vibration signals of gimbal installed base were decomposed through harmonic wavelet packets to form a feature vector by extracting the first 19 wavelet scale energy. The training samples of the principal component analysis were constructed through respectively counting the feature vector of the vibration signal under the different condition of balance and imbalance. The cumulative variance contribution greater than 0. 8 was as the guidelines to determine the number of principal components, the dimension of the feature vector was reduced from 19 dimensions to 2 dimensions. The first principal component and the second principal component jointly distinguish eardan shaft dynamic imbalance. The effectiveness of way has been proved through the bench test data, with high accuracy and a good engineering applicability.

关 键 词：万向传动轴 谐波小波分解 主元分析 动不平衡检测 

分 类 号：U211.5[交通运输工程—道路与铁道工程] U270.331.1[机械工程—车辆工程]