Digital Control Of The Electro-hydraulic Seismic Simulation Shaking Table

The dissertation is finished based on the fund 211 project 'seismic simulation shaking table' of Civil Engineering Structure Vibration Center.The test of electro-hydraulic seismic simulation shaking table is a very important research approach for seismic project. It has been developed rapidly in the recent ten years. Shaking table experiment not only has great load factor, but also can simulate crude seismic wave and artificial wave to load tested object. Seismic simulation shaking table is a complex environment simulation system and show non-linearity, which characteristics will be changed with the condition and state of tested object. Thus, it is a key point for shaking table experiment that whether the wave of shaking table can recur requested seismic wave or not. In order to enable recurrence really seismic condition, the shaking table needs a perfect control system. There are two kinds of control system of analog control and digital control. Comparing with the digital control system, the current existing analog control system has much of flaws, such as bad control precision and a small dynamic range etc. And it cannot match good precision request for the control of seismic simulation shaking table. For digital control system, if a good control algorithm can be implemented, the control problem can be solved effectively.The iteration self-leaning control is a rigorous mathematic description branch of intelligent control. The iteration self-leaning controller doesn't need identify system parameter. It especially is used for the non-linear and great coupling control system, which mathematical model is deduced difficultly and which control precision is requested high.In view of this, the mathematical model of seismic simulation shaking table is deduced based on analyzing constitutes and mechanism of the seismic simulation shaking table in the Civil Engineering Structure Vibration Center of Wuhan University of Technology. The iteration self-learning control algorithm is designed from the angle of intelligent. The result of simulation shows that thealgorithm is feasibility. The control software of the shaking table digital control system is designed in the having been finished hardware platform of electro-hydraulic seismic simulation shaking table. The actual result shows that the digital control system can improve the wave precision of seismic shaking table and control software has a good interface and convenient operation.