A Numerical Approach for Harmonic Retrieval and its Application in Motor Vibration Fault Diagnosis
A numerical parameter match approach for harmonic retrieval is presented to improve the demerits of harmonic retrieval methods, such as complicated calculation, low precision and false frequency appearance. The theory deduction and computer simulation are given to show the validity of the approach, and the implementary steps are offered. Based on the characteristics of the motor vibration fault signals exhibiting cyclostation and harmonic information, the numerical harmonic retrieval method can not only search fixed frequency but also match fault characteristic frequency. By the amplitude modulation fault examples, the degrees of modulation variation are employed to validate the availability of the approach in rotating machinery fault diagnosis.
Long Chen, Yongkang Zhang, Aixing Feng, Zhenying Xu, Boquan Li and Han Shen
L. X. Yang and H. W. Chai, "A Numerical Approach for Harmonic Retrieval and its Application in Motor Vibration Fault Diagnosis", Applied Mechanics and Materials, Vol. 43, pp. 288-292, 2011