Fractal feature

as a new technique of signal processing

is suitable for analyzing the fault signals of rotating machine.By researching the characteristic of non-linear vibration signals of rolling bearings

a study of correlation dimension in analyzing the vibration signals and diagnosing the fault of rolling bearings is proposed.Correlation dimension algorithm is presented in details and quantificational calculation of non-linear vibration signals generated by bearing system is also discussed.Experimental results show that kinematics mechanisms of rolling bearing result in the different working state

so the correlation dimensions are different evidently.The application of correlation dimension in monitoring working state is a new approach to promote the accuracy of rolling bearings.