Study on Vibration Signal Pre-processing Method Based on MATLAB
Yang Haifeng · Jisuanji fangzhen · 2010
A vibration signal collected by vibration test equipment often shows nonlinear,non-balanced and unsmoothed,and deviates from the true value because of outside noise,thus the error and wrong take place in the sequent analysis result.Therefore,the pre-processing of vibration signal is very important in the signal analysis.The pre-processing of vibration signal is the first step of signal eigenvalue extraction and directly determines effect and accuracy of application of subsequent diagnosis technology.This paper discusses on two methods of vibration signal pre-processing,the eliminating polynomial trend item and data smooth processing.Moreover,an algorithm program is realized based on MATLAB.To take an example for two well-known seismic waves,this paper verifies the above algorithm.The results show the processed signal has been improved obviously.