哈尔滨工业大学学报（英文版）2008，Vol.15Issue(6)：794-800,7.
Natural frequencies and damping estimation based on continuous wavelet transform
Natural frequencies and damping estimation based on continuous wavelet transform
DAI Yu 1SUN He-yi 1LI Hui-peng 1TANG Wen-yan1
作者信息
- 1. Dept. of Automatic Measurement and Control, Harbin Institute of Technology, Harbin 150001, China
- 折叠
摘要
Abstract
The continuous wavelet transform (CWT) based method was improved for estimating the natural fre-quencies and damping ratios of a structural system in this paper. The appropriate scale of CWT was selected by means of the least squares method to identify the systems with closely spaced modes. The important issues relat-ed to estimation accuracy such as mode separation and end effect, were also investigated. These issues were as-sociated with the parameter selection of wavelet function based on the fitting error of least squares. The efficien-cy of the method was confirmed by applying it to a simulated 3dof damped system with two close modes.关键词
modal parameters/continuous wavelet transform/least squares methodKey words
modal parameters/continuous wavelet transform/least squares method分类
信息技术与安全科学引用本文复制引用
DAI Yu,SUN He-yi,LI Hui-peng,TANG Wen-yan..Natural frequencies and damping estimation based on continuous wavelet transform[J].哈尔滨工业大学学报（英文版）,2008,15(6):794-800,7.
