DEVELOPMENT OF THE ACTUATOR AND THE CONTROL SYSTEM FOR HIGHWAY BRIDGE VIBRATION CONTROL UNDER TRAFFICLOADS

城市高架桥在交通流作用下的振动引起的地面振动影响着桥梁的使用性能和附近的建筑物。本工程的目的是实现公路桥梁振动的主动振动控制。为此，实验制作了振动控制执行器，并设计了基于DSP（数字信号处理器）的控制器。在本项目中，我们进行了以下研究：(1)桥梁振动的最优控制方法，(2)执行器的试制和控制器的设计，(3)振动控制CAD系统及系统辨识，(4)桥梁振动控制的现场试验。结果表明：(1)导出了扩展后的瞬时控制律。应用新的控制律，可以用卡尔曼滤波来表示LQG对桥梁交通振动的控制。(2)为了构建桥梁振动控制系统，对执行器进行了试制，并设计了基于DSP的控制器。(3)用MATLAB语言实现了振动CAD系统的成型，用Lab VEW软件实现了测量CAD系统的结构识别。(4)通过对人行天桥的现场试验，验证了该系统主动振动控制的有效性。

The ground vibration caused by the urban elevated highway bridge vibration under traffic flows affect the bridge's seviceability and nearby buildings. The purpose of this project is to realize the active vibration control of the highway bridge vibration. So, we make an actuator for the vibration control experimentally and design a controller using by DSP (digital signal processor). In this project, we have studied as follows, (1) the optimal control method of bridge vibration, (2) trial manufacture of actuator and design of controller, (3) the CAD system for vibration control and system identification, (4) field tests for bridge vibration control.Results obtained in this project are summarized as follows :(1) The expanded instantaneous control law is derived. Applying the new control law, the LQG control to the bridge traffic vibration can be formulated with the Kalman filter.(2) In order to construct the control system for the bridge vibration, we made a trial manufacture of actuator and design a controller using by DSP.(3) The vibration CAD system by the MATLAB languate for moldering and the measurement CAD system by the Lab VEW software for structural identification are realized.(4) On filed tests of pedestrian bridge, we confirm effectiveness of active vibration control by the proposed system.