Based on the rub-impact fault levels and trends,a time series analysis technique,i.

An experimental setup was developed to investigate nonlinear vibration characteristics of rotor bearing system with rub-impact fault.

The mapping space relationship was utilized to determine the phase transition of oscillator autonomously and quickly in order to catch the characteristic signal of mechanical faults as early and accurately as possible,and then the early detection of rub-impact fault in rotor was realized.

The purpose of this paper is to detect vibration signals of induction motors with eccentricity, analyse them by continuous wavelet transfrom(CWT), and determine whether rub fault happens.

Based on the rub fault characteristic of the rotating machinery,the rubbing vibration information was collected by eddy current sensor and virtual instrument.

By using the experimental instruments for rubbing fault,the influences of nonlinear characteristics of rotor system with rubbing fault,such as eccentricity,clearance,and rubbing on mid-disc were studied.

In the local and global perspectives,the rotor rubbing fault signals are then analyzed.

According to the characteristics of the rub-impact breakdown of rolling mechanism,using current eddy sensor and virtual instrument to detect and diagnose rub-impact faults of rotor.