A novel fault diagnosis method for second-order bandpass filter circuit based on TQWT-CNN

• Published in: PloS one Vol. 19; no. 2; p. e0291660
• Main Authors: Yuan, Xinjia, Sheng, Yunlong, Zhuang, Xuye, Yin, Jiancheng, Yang, Siting
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 08.02.2024; Public Library of Science (PLoS)
• Subjects: Algorithms; Analysis; Biology and Life Sciences; Computer and Information Sciences; Electric circuit analysis; Electric filters; Electric filters, Bandpass; Engineering and Technology; Methods; Neural networks; Physical Sciences; China
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0291660

To accurately locate faulty components in analog circuits, an analog circuit fault diagnosis method based on Tunable Q-factor Wavelet Transform(TQWT) and Convolutional Neural Network (CNN) is proposed in this paper. Firstly, the Grey Wolf algorithm (GWO) is used to improve the TQWT. The improved TQWT can adaptively determine the parameters Q-factor and decomposition level. Secondly, The signal is decomposed, and single-branch reconstruction is conducted with TQWT to facilitate adequate feature extraction. Thirdly, to capture the time-frequency features in the signal, a CNN-LSTM network is built by combining CNN and LSTM for feature extraction. Finally, CNN, which introduces Fully Convolutional Network (FCN) layers and a Batch Normalization layer, is used to fault diagnosis. The method was comprehensively evaluated with a second-order bandpass filter circuit. The experimental results illustrate that the proposed fault diagnosis method can achieve excellent fault diagnosis accuracy, and the average accuracy is 98.96%.