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| Extension and Window Function Based Improve Method for End Effects of Hilbert-Huang Transform |
| SHI Pei-ming1,2, LI Geng1,2, HAN Dong-ying3, LIU Bin2 |
1.Key Lab. of Meas Tech and Instrum of Hebei Province,Yanshan University, Qinhuangdao, Hebei 066004, China;
2.Institute of Electrical Engineering,Yanshan University, Qinhuangdao, Hebei 066004, China;
3.Institute of of Vehicles and Energy, Yanshan University, Qinhuangdao, Hebei 066004, China |
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Abstract To overcome the end effects of Hilbert-Huang transform, on the basis of existing method to solve the problem, an extension and window function improve method for end effects was proposed.Through the first to signal with similar extreme a extension and then processing by cosine window function,the inaccuracy of extension and original signal changed because of window function are solved.In a certain degree,the end effects of EMD is overcome,getting more the IMF,meanwhile,through the Hilbert transformation get more accurate boundary spectrum and Hilbert spectrum.It is used in the simulation signal and the cracked rotor fault signal analysis proves that the method has a good effect.
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2013, Vol. 34 
