Abstract:To minimize the cross-term interference, a method based on Empirical Mode Decomposition ( EMD) and Cohen’s class distribution was advanced. For the method, at first, the time-domain signal was separated into multiple intrinsic mode functions (IMFs) using EMD, then the Cohen’s class distributions of the IMFs were calculated. And a sum of all Cohen’s class distributions was acquired. This approach was testified effected through three typical simulation signals and the result was consistent with the theory. At last this approach was applied to analyze the track irregularity based on the axle-box acceleration. Compared with the result by track inspection car, the Consistent results was get. It indicated that this approach was a good can compensate some shortage for track inspection vehicle ,and it play a important role in the high-speed high-density test track irregularity.
宁静 诸昌钤 张兵. 基于EMD和Cohen核的轨道不平顺信号分析方法[J]. , 2013, 32(4): 31-38.
NING Jing;ZHU Chang-qian ZHANG Bing. An Approach for Signal Analysis of Track Irregularity by EMD and Cohen’s Kernel. , 2013, 32(4): 31-38.