地震模拟振动台三参量控制技术的研究

摘要

It is difficult to finish the reproduction of earthquake wave when the frequency is narrow and damping is small by using simple displacement control.In this study we use PID and TVC control to obtain the simulation of shaking table test which based on the mathematical model of system and its components with a linearization process.By comparison of the difference of PID and TVC control,we find that the result of simulation with the TVC control can increase the system damping,prevent the resonance damage and thus improve the stability.%针对电液伺服振动台单纯的以位移控制为基础存在着使用频率狭窄和系统阻尼小的缺陷而不能很好地实现波形复现的问题,本文根据地震模拟振动台振动控制系统的工作性能,在对液压系统进行一定线性化处理的基础之上,搭建了系统的数学模型.在单纯位移控制的基础上,增加了加速度和速度环节设计三参量控制器,分别用PID控制和三参量控制的方法对电液振动台进行仿真研究,比较了PID控制和三参量控制的优缺点.仿真结果表明,三参量的方法能有效地增大系统阻尼防止共振破坏,增强了系统的稳定性.