THEORETICAL AND EXPERIMENTAL APPLICATION OF ACTIVE VIBRATION CONTROL TO BRIDGE VIBRATION UNDER TRAFFICLOADS BY SEVERAL CONTROL LAWS

在邻近的城市高架桥中，由交通诱发振动引起的地面振动对建筑物产生影响。本课题研究了利用几种控制律对交通诱导振动的主动控制。为了实现高架桥振动主动控制，需要解决以下问题：(1)根据桥梁观测点获取的信息，预测移动车辆的状态变量。(2)得到时变系统的最优控制律。(3)开发执行器以产生理想的控制力。结果表明：(1)将卡尔曼滤波应用于桥-车-路系统，可以从桥上一个观测点的信息中预测桥-车系统的状态变量。将最优反馈控制与卡尔曼滤波相结合，可以建立随机控制律。(2)对瞬时最优控制理论进行扩展，得到了新的时变系统控制律。数值仿真验证了该控制律的有效性。(3)对执行机构进行了试制。我们对该驱动器所使用的人行天桥进行了振动控制试验。根据试验结果，确定了该驱动器的有效性。

In nearby urban elevated highway bridges, the ground vibrations caused by the traffic induced vibrations affect the buildings. This project studies the active vibration control to the traffic induced vibrations by the several control laws. In order to the realize active vibration control for the elevated bridges, we need to solve the problems as follows.(1) to predict the state variables of the moving vehicles from the informations obtained by the observation points of the bridge.(2) to obtain the optimal control laws for the time variant systems.(3) to develop the actuator to generate the desirable control forces.Results obtained in this project are summarized as follows :(1) Applying the Kalman filter to the bridge-vehicle-road system, we can predict the state variables of the bridge-vehicle system from the informations of one observation point on the bridge. By combing the optimal feedback control and the Kalman filter, the stochastic control law can be formulated.(2) A new control law for the time variant system can be obtained by expanding the instantaneous optimal control theory. The effectiveness of the control law is confirmed by the numerical simulations.(3) The trial construction of actuator was done. We did the vibration control tests of the pedestrian bridge using by the actuator. On the results of the test, the effectiveness of the actuator is ascertained.