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Vol. 179, Issue 9, September 2014, pp. 128-135

 

Bullet

 

Research on the Diagnosis of Rotor Coupling Fault Based on Wavelet Packet
and Local Fisher Discriminant
 

Guangbin Wang, Jun Luo, Yilin He, Xiaoyang Du

Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment,
Hunan University of Science and Technology, 2 Taoyuan Road Xiangtan 411201, P. R. China
Tel.: +86-0731-58290849-2161, fax: +86-0731-58290849

E-mail: jxxwgb@126.com, luojunhnkjdx@163.com, kuoyelin.21@163.com

 

Received: 11 June 2014 /Accepted: 29 August 2014 /Published: 30 September 2014

Digital Sensors and Sensor Sysstems

 

Abstract: this article is for the coupling fault diagnosis of rotor system, and does in-depth analysis of the rotor unbalance and misalignment, and the fault formed by the coupling of these two. Through research, Rotor Coupling was found filled with rich features. In this paper, Wavelet packet de- noising ideas being introduced to the local Fisher discriminant analysis (LFDA), a new method of fault diagnosis based on Wavelet Packet and Local Fisher Discriminant is proposed. The technology of information fusion is applied to the data processing with coupling faults. By comparing and analyzing the algorithms effect of LE, LPP, FDA, LFDA and IOLFA through experiment, it shows that LE and LPP are unable to identify the fault, while FDA, LFDA has better identification, and Wavelet Packet and Local Fisher discriminant has the best effect.

 

Keywords: Rotor system, Wavelet packet, Local Fisher discriminant, Coupling fault.

 

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