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中文摘要：
将基于变量预测模型（VariablePredictiveModelbasedClassDiscriminate，VPMCD）的方法引入滚动轴承的故障诊断，提出了基于EMD（EmpiricalModeDecomposi—tion，EMD）和VPMCD的滚动轴承故障诊断方法．采用EMD方法提取滚动轴承振动信号特征向量后，以VPMCD作为模式识别方法对滚动轴承的工作状态和故障类型进行分类．对正常状态、外圈故障、内圈故障3种不同类别下的滚动轴承振动信号进行了分析，结果表明了该方法在滚动轴承故障诊断中的有效性．同时，与人工神经网络（Artificialneuralnet—work，ANN）算法的对比分析表明，VMPCD算法分类性能的稳定性以及计算效率均要高于ANN算法．
英文摘要：
Variable predictive model based class discriminate （VPMCD） method was introduced to roll- er bearing fault diagnosis, and a roller bearing fault diagnosis approach based on empirical mode decompo- sition （EMD） and VPMCD was put forward. Firstly, different feature vectors were extracted with EMD. Then, different working conditions and failures of roller bearing were distinguished by using VPMCD. A- nalysis results of vibration signals from roller bearing＇s normal condition, outer ring fault and inner ring fault show the effectiveness of the proposed approach in roller bearing fault diagnosis. What＇s more, com- parative analysis results demonstrate that VPMCD algorithm gains more stable classification performance and better computational efficiency than artificial neural network （ANN） algorithm.
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