Interaction effects of detuning and time-delay on generalized hybrid mass damper systems

Shih-Yu Chu, Yuan Chih Liao, Chia Wen Ho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The vibration mitigation performance of a conventional tuned mass damper system (TMD) is very sensitive to the fluctuation in tuning of the designed frequency to the natural frequency of the main system. In view of the stochastic characteristics of external loading and the errors of identifying system parameters, a hybrid mass damper system (HMD) with optimal selection on control parameters can enhance the designed performance with the help of a supplementary active force acted between the main system and the mass damper. However, the control performance degradation induced by the control force application time-delay should be considered and investigated before practical application. Having the best versatility in mind, the generalized hybrid mass damper (GHMD) systems commonly applied are reclassified and investigated in this paper to examine diversified needs. The variations in their modal properties and tuning effect with respect to delay time are addressed based on an explicit formula derived from a delayed exponential characteristic equation (DECE). It is found that the active control force with delay-time chosen as the natural period of the system in a HMD based on uncompenstaed output feedback sources will keep the robustness on response reduction performance. This advantage degrades for nonoptiaml systems with delayed control force due to the detuning phenomenon. In order to provide the implementation guideline, a detailed study is addressed to demonstrate the interaction effects of detuning and time-delay in this study. A multiplesampling-rate algorithm is applied to verify the control performance in time domain subjected to earthquake excitations.

Original languageEnglish
Title of host publicationWind and Earthquake Engineering - Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
Pages187-192
Number of pages6
Publication statusPublished - 2006 Dec 1
Event10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010 - Bangkok, Thailand
Duration: 2006 Aug 32006 Aug 5

Publication series

NameWind and Earthquake Engineering - Proceedings of the 10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
Volume3

Other

Other10th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2010
CountryThailand
CityBangkok
Period06-08-0306-08-05

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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