【摘要】 本文首先介绍了基本的小波理论,并利用其对某工程振动测试信号进行了分析与预处理,主要集中在消噪、分析突变信导及非平稳特性这几方面。指出了尺度的变化对分析结果的影响,并将结果进行了比较。更多还原

【Abstract】 In this paper, the basic wavelet theory is introduced, in the scope of continuous wavelet transform, Mallat arithmetic and scale function. Application of the theory to process the vibration signals is illustrated in the use of signal with non-balanced property to be de-noised and to be analyzed. At the last, from the comparison of two results, the conclusion is drawn that the scale would affect the result.更多还原