A vibration-based fault diagnosis method for rolling bearings via optimized wavelet-SVM fusion

Zhang, A. Haitao; Guan, B. Li; Chang, C. Long

doi:10.22061/jcarme.2025.10582.2401

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	A vibration-based fault diagnosis method for rolling bearings via optimized wavelet-SVM fusion
Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 06 مهر 1404 اصل مقاله (1.05 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2025.10582.2401
نویسندگان
A. Haitao Zhang^* ¹؛ B. Li Guan¹؛ C. Long Chang²
¹College of Mechanical Engineering, Nanjing Vocational University of Industry Technology, Nanjing , China
²Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
تاریخ دریافت: 20 دی 1402، تاریخ بازنگری: 27 شهریور 1404، تاریخ پذیرش: 06 مهر 1404
چکیده
Rolling bearings are critical components of rotating machinery, and their health status directly affects the operational reliability of equipment. This paper proposes an optimized wavelet-SVM fault diagnosis method based on multi-source vibration signal fusion: Three-channel inputs are constructed by synchronously collecting vibration signals from the drive end and fan end, along with their differential signals; Wavelet packet decomposition is utilized to extract frequency-domain features such as unit node energy entropy and wavelet coefficient standard deviation, while dimensionless indicators independent of rotational speed (kurtosis factor/waveform factor/impulse factor) are introduced to enhance time-domain characterization; The fused features are input into an RBF-SVM classifier after dimensionality reduction via PCA (retaining 99% variance, reducing dimensions from 102 to 4). Experiments indicate that on the CWRU dataset, this method achieves 97.0% precision, 96.9% recall, and an F1-score of 96.9% (representing a 2.9% improvement over single-source input methods); Although there is a 2.4% absolute accuracy gap compared to deep learning solutions, it possesses significant edge advantages—memory usage is only 12KB and inference latency is 0.6ms—providing a high-precision, low-cost embedded solution for rotating machinery fault diagnosis
کلیدواژه‌ها
Statistical features؛ Wavelet packet decomposition؛ Gaussian kernel function؛ Principal component analysis؛ Prediction accuracy

مراجع
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A vibration-based fault diagnosis method for rolling bearings via optimized wavelet-SVM fusion