Abstract：In this paper,the intrinsic scale component method is improved.A new method is provided,which is called B spline-based local characteristic-scale decomposition method (BLCD ).Then the BLCD method and wavelet domain bispectrum is used to diagnose the gear. Firstly, this article is analysed the BLCD and ITD with each other, which can be seen that the BLCD method has obvious advantages. Secondly, the gear vibration signals are decomposed adaptively into some intrinsic scale components by using the BLCD method. At last, the wavelet domain bispectrum method is used to analyse the ISC, the dual spectrum peak numbers and coupling frequency components is used to judge gear fault feature information, the experimental results show that, based on BLCD and wavelet domain bispectrum method can be effectively applied to gear fault diagnosis.
2013, Vol. 32 
