Study on coupling faults of rotary machinery diagnosis method based EMD and fractal box dimension
HAN Dongying 1 LI Geng2 SHI Peiming2
1. College of Vehicles and Energy Yanshan University Yanshan University, Qinhuangdao 066004;2. Key Laboratory of Measurement Technology and Instrumentation of Hebei Provnice, YanshanUniversity, Qinhuangdao 066004
Abstract：Aiming at coupling faults diagnosis of rotary machinery, based on EMD (Empirical Mode Decomposition) and fractal box dimension method of faults diagnosis is proposed. With the method combining adaptability of EMD processing nonlinear signal and characteristic that fractal box dimension can quantificationally describe nonlinear behaviors, the method through the first to process fault signal by EMD and obtain Intrinsic Mode Function (IMF) containing fault characteristic, than to solve box dimension of IMF and to diagnose fault through comparing and analyzing the box dimension. A dynamic model of the rotor -bearing system is established consider in coupling fault of crack rub-impact and pedestal looseness, vibration signal of fault model is obtained with Runge-Kutta method. Through to analyze coupling fault signal, getting coupling fault feature vector, meanwhile, comparing with the traditional boundary spectrum diagnosis method, proving the method for coupling fault diagnosis of rotating machinery validity and advantage.
韩东颖 李庚 时培明. 基于EMD和分形盒维数的旋转机械耦合故障诊断方法研究[J]. , 2013, 32(15): 209-214.
HAN Dongying LI Geng SHI Peiming. Study on coupling faults of rotary machinery diagnosis method based EMD and fractal box dimension. , 2013, 32(15): 209-214.
2013, Vol. 32 
