Global geometric similarity scheme for feature selection in fault diagnosis |
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Affiliation: | 1. Nagoya Institute of Technology, Department of Computer Science, Gokisho, Showa, Nagoya, Aichi, 466-8555, Japan;2. University of the Ryukyus, Department of Electrical Engineering, Nakagami, Nishihara, Okinawa, 903-0213, Japan;1. Department of Computer Languages and Systems, University of Seville, Av Reina Mercedes S/N, 41012 Seville, Spain;2. School of Information Systems, Computing and Mathematics, Brunel University, Uxbridge, Middlesex UB7 7NU, United Kingdom;1. School of Economics and Management, Free University of Bozen-Bolzano, Bolzano, Italy;2. Institute of Mathematics, University of Warsaw, Warszawa, Poland;3. Department “Methods and Models for Economics, Territory and Finance”, Sapienza University of Rome, Rome, Italy |
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Abstract: | This work presents a global geometric similarity scheme (GGSS) for feature selection in fault diagnosis, which is composed of global geometric model and similarity metric. The global geometric model is formed to construct connections between disjoint clusters in fault diagnosis. The similarity metric of the global geometric model is applied to filter feature subsets. To evaluate the performance of GGSS, fault data from wind turbine test rig is collected, and condition classification is carried out with classifiers established by Support Vector Machine (SVM) and General Regression Neural Network (GRNN). The classification results are compared with feature ranking methods and feature wrapper approaches. GGSS achieves higher classification accuracy than the feature ranking methods, and better time efficiency than the feature wrapper approaches. The hybrid scheme, GGSS with wrapper, obtains optimal classification accuracy and time efficiency. The proposed scheme can be applied in feature selection to get better accuracy and efficiency in condition classification of fault diagnosis. |
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Keywords: | Feature selection Global geometric similarity scheme Condition classification Feature ranking Feature wrapper |
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