Research & Implement Of Electro-hydraulic Seismic Simulation Shaking Table

The test of electro-hydraulic seismic simulation shaking table is a very important research approach for seismic project. It has been developed rapidly in recent years and been applied in several industrial departments. The existent seismic simulation shaking table is mostly based on displacement control. It has many limitations. For example, its capable frequency range is narrow and it can't rescur seismic wave. So this paper presents a controller, which is based on three kind of strain feedback. These controllers respectively use displacement control, speed control and acceleration control. Its advantage is that the controller with three parameters can control three physical parameters simultaneously. So we can have some wide-frequency test on normal shaking tables with it.In addition, electro-hydraulic control system is a complicated non-linearity system because of non-linearity influence of servo valve and the together effect of table and object. In order to recur the seismic wave, a perfect control system is necessary. When it is running, iteration self-learning controller needn't identify system parameters but adjust income to develop the performance of system. The mathematical model of seismic simulation shaking table is deduced based on analyzing constitutes and mechanism of the seismic simulation shaking table. The iteration self-learning control algorithm is designed from the angle of intelligent. The result of simulation shows that the algorithm is feasibility.