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Output-only time-frequency-domain modal identification of time-varying structures using a recursive two-stage least square method
Book Contribution - Book Chapter Conference Contribution
Real-time acquisition of modal parameters may contribute to the on-line structural dynamic research of time-varying structures, such as the health monitoring, the damage detection, the vibration control, etc. The recursive algorithms of modal parameter estimation supply the fundamental of acquiring modal parameters in real-time. This paper presents a recursive method of modal parameter estimation for time-varying structures, including the recursive estimation of time-dependent power spectra using the recursive least square filter, modal parameter estimation at each time instant using the least square complex frequency-domain method, the modal parameter validation using the recursive fuzzy clustering and the continuous-time estimation of modal parameters using a recursive least square approach. An experimental example validate the proposed method finally. © (2012) by the Katholieke Universiteit Leuven Department of Mechanical Engineering All rights reserved.
Book: PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING (ISMA2012) / INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS (USD2012)
Pages: 2731 - 2743
Number of pages: 13
ISBN:9781622768257
Publication year:2012