A load identification method based on wavelet multi-resolution analysis

详细信息    查看全文

• 作者：Zong Li ; Zhipeng Feng ; Fulei Chu
• 刊名：Journal of Sound and Vibration
• 出版年：20 January, 2014
• 年：2014
• 卷：333
• 期：2
• 页码：381-391
• 全文大小：1321 K

文摘

Load identification, as a kind of indirect identification method, uses system characteristic and responses to calculate loads. A method based on wavelet multi-resolution analysis is proposed in this paper. By wavelet decomposition and transform at certain resolutions, the proposed method transforms the convolution relation between responses and loads in time domain into the linear multiplicative relation between system responses and wavelet responses in the wavelet domain. Loads can be identified as long as the linear multiplicative relation is solved. Qualitative and quantitative rules are proposed for selecting parameters that affect the accuracy of the proposed method, and are illustrated via numerical investigations. The method is illustrated by a multi-input-multi-output numerical simulation. A multi-input-multi-output laboratory experiment is performed to compare the proposed method with the frequency method on the identification ability.