Identification method of periodic breaks based on variational higher order cepstrum
1. School of Mechanical Engineering and Automation, Northeastern University, Shengyang, Liaoning 110004, China; 2. School of Mechanical Engineering, Shen Yang Institute of Chemical Technology, Shenyang, Liaoning 110142, China; 3. Department of Mechanical Electronic Engineering, Liaoning College of Communication, Shenyang, Liaoning 110122, China ）
Abstract：The frequency domain characteristics of signals with periodic breaks are analyzed. A novel identification method with variational higher order cepstrum is presented. In this method, the result data of Fourier transform is adjusted firstly, then the variational higher order spectrum is calculated according to the new frequency function designed for improving the analysis effect. To estimate the period of breaks, the cepstrum, namely the variational higher order eepstrum of some frequency slice in above spectrum should be calculated. The proposed method can utilize whole data of Fourier transform to enlarge the space for calculating higher order spectrum, and improve the effect of identifying the periodic breaks. The results of experiments show that this method can identify the periodic breaks and the period of breaks accurately.
2008, Vol. 29 
