Axis Orbit Recognition of the Hydropower Unit Based on Feature Combination and Feature Selection

• DOI: 10.3390/s23062895
• Publication Date: 2023-03-08T07:08:14Z
• Authors: Wushuang Liu; Yang Zheng; Xuan Zhou; Qijuan Chen
• Keywords: hydropower unit; axis orbit; feature combination; feature selection; feature selection; feature combination; Chemical technology; hydropower unit; TP1-1185; axis orbit; Article

Axis-orbit recognition is an essential means for the fault diagnosis of hydropower units. An axis-orbit recognition method based on feature combination and feature selection is proposed, aiming to solve the problems of the low recognition accuracy, poor robustness, and low efficiency of existing axis-orbit recognition methods. First, various contour, moment, and geometric features of axis orbit samples are extracted from the original data and combined into a multidimensional feature set; then, Random Forest (RF)-Fisher feature selection is applied to realize feature dimensionality reduction; and finally, the selected features are set as the input of the support vector machine (SVM), which is optimized by the gravitational search algorithm (GSA) for axis-orbit recognition. The analytical results show that the proposed method has high recognition efficiency and good robustness while maintaining high accuracy for axis-orbit recognition.