Dissertation > Industrial Technology > Building Science > Building structure > Special Structure > Anti - shock structure,disaster prevention structures > Shock, isolation, and explosion-proof structure > Isolated structure

Semi-active Control of Seismic Response of Benchmark Model Based on Smart Piezoelectric Friction Damper

Author LiuYang
Tutor DongPing
School Huazhong University of Science and Technology
Course Structural Engineering
Keywords Smart piezoelectric friction damper Earthquake response Benchmark model Control algorithm Semi-active control MATLAB
CLC TU352.12
Type Master's thesis
Year 2011
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Structural vibration control is a new type of cushioning technology , the smart piezoelectric friction damper earthquake under the control of the structure is an effective method . Smart piezoelectric friction damper is based on the works of the friction damper and a piezoelectric actuator inverse piezoelectric effect , combined with the requirements of the structural damping , friction damper can be changed in real time , allowing the seismic response of structures real-time control , to improve the energy dissipation capacity of the friction damper with intelligent features . Home and abroad have some experts experimental and theoretical study of the structural vibration control based on a smart piezoelectric friction damper , also yielded some results , but there are still some problems in the application of engineering practice , need to further improve and resolved. Earthquake response Benchmark model based on a smart piezoelectric friction damper semi-active control system comparison , mainly reflected in the following aspects : First , according to the inverse piezoelectric effect of piezoelectric ceramics and the combination of passive friction damper the characteristics of the device , designed a new type of smart piezoelectric friction damper analysis damping force model , and draw out its restoring force curve . Second , calculate the difference between the results due to the randomness of earthquakes and seismic waves , seismic waves reasonable choice for dynamic analysis and calculation is to ensure that the important issues of the reliability of the calculations , so to choose a reasonable seismic records . Finally, using MATLAB programming , structural seismic response under different control modes to set the the smart piezoelectric friction damper Benchmark model simulation analysis , and control effects were compared . Through the analysis and comparison of the four semi- active control algorithm , and bound the Hrovat optimal control algorithm achieved relatively good seismic control , displacement and speed of the damping rate of about 35% , the damping rate of acceleration up to 25 percent. In addition, to further discuss the gauge Hrovat optimal control , semi - active optimal control design and in relation to the robustness of the control system of structural damping and stiffness uncertainty analysis .

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