北京交通大学学报2025，Vol.49Issue(6)：41-54,14.DOI:10.11860/j.issn.1673-0291.20250039
基于CPO-VMD-SWTTV的转辙机振动信号降噪算法研究
Vibration signal denoising of switch machines based on CPO-VMD-SWTTV method
摘要
Abstract
To address the challenge of extracting fault features from switch machine vibration signals under varying noise conditions,this study proposes a denoising method combining Crested Porcupine Optimization(CPO)-optimized Variational Mode Decomposition(VMD)with Stationary Wavelet Transform Total Variation(SWTTV).First,the vibration signal is decomposed into multiple Intrinsic Mode Functions(IMF)using CPO-optimized VMD.Second,a hybrid criterion combining correlation coefficient and kurtosis is employed to select relevant IMFs.The selected IMFs are then denoised and reconstructed using the SWTTV algorithm.Finally,the method's performance is evaluated using both simulated test signals and field-collected switch machine vibration signals.Experimental results demonstrate that under different Signal Noise Ratios(SNR),compared to the VMD-WT algorithm,the proposed method achieves an improvement in output SNR of approximately 1 to 6 dB,a reduction in Root Mean Square Error(RMSE)by about 0.03,and an increase in the correlation coefficient with the original signal by approximately 0.01.Furthermore,the proposed algorithm effectively preserves signal features under various operating conditions,avoiding signal distortion.The proposed algorithm exhibits strong generalization capability and robustness,providing a theoretical basis for feature extrac-tion and fault diagnosis of switch machine vibration signals.关键词
转辙机/振动信号降噪/冠豪猪算法/变分模态分解/全变分平稳小波正则化Key words
switch machine/vibration signal denoising/Crested Porcupine Optimization(CPO)/Variational Mode Decomposition(VMD)/Stationary Wavelet Transform Total Variation(SWTTV)分类
信息技术与安全科学引用本文复制引用
杨航涛,冯庆胜,韩准,肖帅,宋雅坤,梁天添..基于CPO-VMD-SWTTV的转辙机振动信号降噪算法研究[J].北京交通大学学报,2025,49(6):41-54,14.基金项目
辽宁省教育厅基本科研项目(JYTMS20230037) （JYTMS20230037）
辽宁省教育厅项目(LJ242510150003) Basic Scientific Research Project of Liaoning Provincial Department of Education(JYTMS20230037) （LJ242510150003）
Project of the Liaon-ing Provincial Department of Education(LJ242510150003) （LJ242510150003）
