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中文摘要：
为了解决地震模拟振动台控制系统设计时将试验试件假定为刚性质量造成的控制系统控制频带窄、稳定性差、地震记录再现精度低等问题,通过系统建模分析了单自由度、多自由度柔性负载在刚性负载设计参数、空载设计参数控制下的系统性能.结果表明,柔性负载在空载设计参数下的系统稳定性更优.实例仿真表明,空载设计参数控制下系统稳定性得到大幅度改善.
英文摘要：
The specimen is assumed to be a rigid mass in the design of the shaking table control system,but in fact,there is a big difference between the specimen and the shaking table system caused by the assumption of the rigid mass of the specimen. This results in the control system operating in a narrow frequency band and poor stability reducing the replaying precision of the recorded seismic waves. In this paper,models are established both for the SDOF and MDOF systems which are designed to be the rigid mass and non-rigid mass,and then,through the analysis of these models,the performances of the control systems are evaluated. The conclusion is that the stability of the system designed for the non-rigid mass performs best in the unloaded condition and the stability of shaking table is greatly improved.
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