• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2018, Vol. 54 ›› Issue (23): 137-159.doi: 10.3901/JME.2018.23.137

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Research Progress on Time-domain Modal Parameter Estimation Methods for Linear Time-varying Structures

MA Zhisai1,2, DING Qian1,2, LIU Li3,4, ZHOU Sida3,4   

  1. 1. School of Mechanical Engineering, Tianjin University, Tianjin 300350;
    2. Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin 300350;
    3. School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081;
    4. Key Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education, Beijing 100081
  • Received:2017-12-23 Revised:2018-06-02 Online:2018-12-05 Published:2018-12-05

Abstract: With the development of engineering applications, more and more time-varying structures are being used and their intrinsic time-varying characteristics are increasingly inevitable, which brings us many problems on time-varying structural dynamics. The research background of time-varying structural dynamics and the motivation of modal parameter estimation for time-varying structures are first introduced from the standpoint of inverse problems. The modal parameter estimation methods for linear time-varying structures are classified, and the procedures to obtain "frozen-time" modal parameters from parametric time-domain identified models are subsequently presented. By investigating state-of-the-art of time-domain modal parameter estimation methods for time-varying structures and the existing experimental verification systems, major issues and future research directions in this area are finally discussed.

Key words: linear time-varying structures, modal parameter estimation, time-domain

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