SIGNATURE EXTRACTING METHOD OF THE FAULT OF RUBBING ROTOR BASED ON MEASURED
IMPULSE RESPONSE

LI Yungong¹  LIU Jie¹  ZHANG Jinping²

(1. School of Mechanical Engineering & Automation, Northeastern University, Shengyang 110004;
2. School of Mechanical Engineering, Shengyang Institute of Chemical Technology, Shenyang 110142 )

Abstract: The method of signature extracting of rubbing rotor based on the measured impulse response is proposed. The vibration signal is analyzed by the normalization measured impulse response to extract the impact response of system. At the same time, a new method extracting periodic impulse is proposed based on the measured impulse response, which is defined as period series transform, this method can not only extract the periodic impulse responses, but also calculate the period of the impulse response. In view of the measure facility and simple-ness of signal component, the method of measuring the signal of rotor and stator at the same time is put forward. The test shows that these methods are effective.

Key words: Impulse response Rubbing rotor Fault diagnosis Signature extracting

CLC No: TH113

Received 20060613, received in revised form 20061127