H∞ Direct Acceleration Output Feedback of Structure Control

• Main Authors: Chao-Hsien Li, 李昭賢
• Other Authors: Chi-Chang Lin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/19766519514158523721

碩士 === 中興大學 === 土木工程學系所 === 95 === This paper investigates the H∞ control, which is a direct acceleration output feedback control method of structural vibrations due to earthquakes. This algorithm is used to reduce the structural responses due to earthquakes. To design a better controller, achieve optimal control performance, and to stabilize the control system of a structure equipped with active tendon system, the design parameters of γ and α is extensively investigated by considering the control force execution time delay. Based on the analysis results, it is found that the smaller γ or larger α, the better control effectiveness there is. In this study Fourier transform function and different earthquake records are used to simulate in exciting structural responses. Three different experimental setups, which considering time delay, same force excitation, and critical design control parameters, multiple degree of freedom (MDOF) system are used for the computer simulation and the results are studied. Finally, compare three different direct output feedback control methods under same force excitation for vibration control. The conclusions of this study are used for the future design of the H∞ control.