Compound angle-synchronizing control strategy for dual electro-hydraulic motors in hydraulic flight motion simulator

In order to improve synchronization accuracy, a compound angle-synchronizing control strategy is presented for dual electro-hydraulic motors in hydraulic flight motion simulator. This compound angle-synchronizing controller includes velocity feed-forward synchronizing control scheme and torque decoupling control scheme. This control strategy fully considers the mechanical structure and stiffness of the dual electro-hydraulic motors. The mathematical model of dual electro-hydraulic motors is established. A prototype testbed of dual electro-hydraulic motors has been set up, the compound controller is tested by the experiment. By analyzing experiment results, the designed compound angle-synchronizing controller can restrain torque coupling disturbance and improve the angle synchronization accuracy compared with traditional angle-synchronizing controllers.