A Research of Fault Feature Extraction of Rub-Impacting Rotor Based on Instantaneous Power

The instantaneous power mutation induced by rub-impacting will break out when rub-impacting of rotor takes place in the response system. The matrix expressions to calculate instantaneous power are deduced based on the feature of rotor vibratory response, and a method using the measured value of rotor impacting response as the kernel function for instantaneous power analyzing. The experimental system is designed and the experiment results show that the method can give expression of the features of periodic instantaneous power mutation acted by the impacting force in the rotor vibratory response system. The method is proved to be effective.