Vibration Control Performance of Pseudo Hybrid Mass Damper Systems with Optimal Time Delay Compensation

• Main Authors: Chia-wen Hou, 侯佳玟
• Other Authors: Shih-Yu ,Chu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/46361641166515714256

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 95 === 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. Because 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. In practical consideration, using discrete time optimal control theorem involved time delay effect ,the Pesudo Hybrid Mass Damper (PHMD) systems are proposed to investigate the interactive detuning of parameter and time delay. A multiple-sampling -rate algorithm is applied to verify the control performance in time domain subjected to earthquake excitations. From numerical results of frequrncy domain and time domain, if choose optimal control designed value and optimal delay time, the good control performance provide stable modal damping and keep tuning,which better than TMD & HMD system.