Active mass damper using neural oscillator for generating a limit cycle of target structure
Reducing vibration of high-rise structures under earthquake load has been the subject of considerable efforts in Japan.Relevant researches about vibration energy dissipation devices for buildings have been undertaken.An active mass damper is one of the well-known vibration control devices.Despite the accumulation of much knowledge of control design methods for the system,application of the devices to high-rise structures under earthquake load is challenging,because the active mass dampers have one serious disadvantage about stroke limitation of the auxiliary mass.In this study,we have proposed a new control system,which had a neural oscillator and position controller,to solve this problem.The main role of this neural oscillator included in newly proposed system is picking up the phase information of the eigen-frequency component of a target structure,then the auxiliary mass of an active mass damper is excited by reference to the oscillators signal.We can easily regulate the stroke of the active mass damper no matter how large the target structure swings,because the control signal for the auxiliary mass of the phase and amplitude information of the active mass damper are separately processed.In the previous our research,the active mass damper was stated to control after the target structure was shaken by disturbances,however,in this paper,we try to control the active mass damper before the target structure was shaken.This approach generates a limit cycle of the phase space of the target structures state quantity,and then the structure gets an entrainment property and an attracter which neural oscillators have.In other word,the structure can get flexibility for environmental changes and robustness for unexpected disturbances which neural oscillators have.Furthermore,the vibration mitigation performances of this new method generating a limit cycle of the target structure are uncovered by the numerical simulation.
Active mass damper Neural oscillator Synchronization Limit cycle Selfexcitation
J.Honhu D.Iba
Department of Mechanical and Aerospace Engineering,Tottori University,Tottori,Japan Faculty of Mechanical Engineering,Kyoto Institute of Technology,Kyoto,Japan
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
516-524
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）