LMD Method and Multi-Class RWSVM of Fault Diagnosis for Rotating Machinery Using Condition Monitoring Information

Sensors

Zhiwen Liu²  Xuefeng Chen¹  Zhengjia He² 

[1] State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

关键词: local mean decomposition;    reproducing wavelet kernel support vector machines;    fault diagnosis;    sensor-based vibration signals;    rotating machinery;   

DOI  :  10.3390/s130708679

来源: mdpi

【 摘 要 】

Timely and accurate condition monitoring and fault diagnosis of rotating machinery are very important to maintain a high degree of availability, reliability and operational safety. This paper presents a novel intelligent method based on local mean decomposition (LMD) and multi-class reproducing wavelet support vector machines (RWSVM), which is applied to diagnose rotating machinery faults. First, the sensor-based vibration signals measured from the rotating machinery are preprocessed by the LMD method and product functions (PFs) are produced. Second, statistic features are extracted to acquire more fault characteristic information from the sensitive PF. Finally, these features are fed into a multi-class RWSVM to identify the rotating machinery health conditions. The experimental results validate the effectiveness of the proposed RWSVM method in identifying rotating machinery fault patterns accurately and effectively and its superiority over that based on the general SVM.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.