Application research of generalized morphological filter in vibration signal processing

In order to eliminate all kinds of noise interferences in vibration signal, based on the basic transforms of mathematical morphology, a method of using generalized morphological filter to process vibration signals in rotating machinery was put forward. With this method, noise interferences could be eliminated by a combination of open-closing and close-opening generalized morphological filter, without considering vibration spectrum characteristics. Simulation results show that the generalized morphological filter can eliminate pulse interferences and reduce random noises. The generalized morphological filter has good filtering effectiveness, simple algorithm and high calculating speed; it also has good on-site application value.