Modal Identification Based on Hilbert Transform for Time-varying System

摘要：

　　Modal identification methods based on the Hilbert Transform are applied to identify modal parameters of time-varying system using impulse response time histories.First, the response data are decomposed into modal responses through the empirical mode decomposition (EMD).Then, the Hilbert transform is applied to each modal response to obtain the instantaneous frequencies.The applications of the proposed methods are illustrated using a 3 degree-of-freedom (DOF) system with time-varying dynamic characteristics.Numerical simulation results demonstrate that the proposed system identification methods yield good results.

关键词： Hilbert Transform Modal analysis Time-varying system Instantaneous frequency

作者: Min Zheng Fan Shen

作者单位: College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,China College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,China

会议类型: 国际会议

会议名称: the 2012 International Conference on Vibration, Structural Engineering and Measurement (2012年振动、结构工程与测量国际会议(ICVSEM2012))

会议地点: 上海

会议语种:英文

页码: 303-307

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）