Three-state Feedback Control of Electro-hydraulic Servo Shaking Table Based on State Space Research

In order to improve the control bandwidth of the electro-hydraulic servo shaking table, a three-state control strategy based on state space analysis is proposed in this paper. First, the working principle of electro-hydraulic servo shaking table is introduced. According to the theory of electro-hydraulic servo system, four equations describing the whole mathematical model of electro-hydraulic servo shaking table are given, and the open loop control model is presented. Then, the open loop model is analyzed by the state space method. The optimal three-state feedback control parameter is put forward on account of the ideal three-order closed loop transfer function. Finally, the simulation analysis shows the effectiveness of the proposed control method which can effectively improve the system frequency width of the electro-hydraulic servo shaking table.