Monitoring and Troubleshooting Alstom Locomotive Blowers using Vibration Analysis and Support Vector Machine

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, Guilan University, Guilan, Iran

2 Faculty of Mechanical Engineering, Yazd University, Yazd, Iran

3 Faculty of Electrical Engineering, Yazd University, Yazd, Iran

4 دانشکده مهندسی مکانیک، دانشگاه گیلان، گیلان، ایران

Abstract

Vibration analysis is one of the most practical methods for monitoring and troubleshooting rotating equipment. In this research, vibration analysis and support vector machine algorithms were used for monitoring and troubleshooting Alstom locomotive blowers. First, vibration data were collected from the blowers and the received signals were categorized into four groups: healthy blowers and blowers with problems of unbalance, loose shaft (base), and warped blades. Sixteen frequency and time features were then extracted from the received signals. Because in rotating systems, the ratio of the intensity of vibrations in the harmonics of the rotation of the machine can help diagnose the faults, the ratios of all features were calculated and defined as new features. The accuracy of the network can be sometimes lowered by the multitude of features, thus, a t-test filter was inserted into the support vector machine algorithm to select the features. The results show that the t-test filter increased the accuracy of the support vector machine algorithm. Finally, the feature selection of this network was compared with the feature selection by the genetic algorithm. The results show that the network designed in this research has a better performance in feature selection than the genetic algorithm.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 54, Issue 8
November 2022
Pages 1833-1850

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