巨型框架多功能减振结构脉动风振反应的瞬时最优半主动控制

INSTANTANEOUS OPTIMAL SEMI-ACTIVE CONTROL OF PULSATING WIND VIBRATION RESPONSE OF MULTIFUNCTIONAL VIBRATION-ABSORPTION OF MEGAFRAME STRUCTURE

根据瞬时最优主动控制的原则,提出了同时控制位移、速度和加速度的最优主动控制策略,并利用磁流体阻尼器,对巨型框架多功能减振结构的脉动风振反应进行了半主动控制,表明磁流体阻尼器控制结构的半主动控制能显著减小主次框架的振动加速度,能有效地降低主框架的振动位移,其控制效果优于被动控制。

Based on the principles of instantaneous optimal active control, it is developed an optimal active control algorithm commanding the structure displacement, velocity and acceleration simultaneously. Moreover, a semi-active control of the pulsating wind vibration response of muhifunctional vibration-absorption of a megaframe structure has been practised by means of magnetorheological damper. The result seems to indicate that the semi-active control employing magnetohydrodynamic damper may be able to significantly reduce the vibration acceleration response of the main and the secondary frame. Besides, the vibration displacement response of the main frames can also be effectively suppressed. In addition, the control effect of semi-active control may be superior to that of passive control.