关键词: 振动与波, 信号分解, 包络曲线, 端点效应, 希尔伯特-黄变换, 经验模式分解, 固有模态函数

Abstract:

There has become a new method for analyzing nonlinear and nonstable signals in recent years. This new method could be generally called Hilbert-Huang Transform. Those nonlinear and nonstable signals could be decomposed by Hilbert-Huang Transform. Unfortunately, there would have got a problem with an endpoint effect in the process of decomposing those signals. The nearest simple extreme mirror extension method was proposed to solve this problem. The method was being established to analyze a nonlinear simulation signal. The results show that the method can suppress the endpoint effect very effectively and improve the decomposition accuracy of the nonlinear simulation signal. In addition, it is a humble, adaptable and generic method.