基于半监督拉普拉斯特征映射的故障诊断

针对有标记故障样本不足和故障数据高维非线性的问题，提出了基于半监督拉普拉斯特征映射（LE）算法的故障诊断模型。该模型运用LE算法，直接从原始高维振动信号中提取低维流形特征，并将其输入到基于LE的半监督分类器，从而识别出机械设备的运行状态。与传统方法相比，该模型能明显提高滚动轴承和齿轮的故障识别性能。

Fault Diagnosis Based on Semi-supervised Laplacian Eigenmaps

Aiming at solving the problems of insufficient labeled fault samples and high-dimensional nonlinear fault data, a fault diagnosis model was proposed based on semi-supervised LE algorithm. The model directly extracted the low-dimensional manifold features from the raw high-dimensional vibration signals, by implementing LE algorithm. The features were fed into semi-supervised classifier based on LE algorithm. Thereby, the operating conditions of mechanical equipment were recognized. Compared with the traditional methods, the model is able to obviously improve fault recognition performance of rolling bearings and gears.