Static force balancing device and control method suitable for an electric vibration table

Abstract

The application discloses a static force balance device and control method suitable for an electric vibration table. The device is composed of a rear support, a bull head support or an auxiliary support, an actuator, a servo valve, a piston type energy accumulator and a hydraulic oil station to form a mechanical hydraulic main body. The static force balance control strategy adopted by the device is mainly force feedback closed loop control, and the working position deviation of the vibration table is introduced as a control compensation amount. Meanwhile, aiming at the parallel driving force balance control of the single rod type servo tension actuator or the thrust actuator in the vertical mode, an average force differential compensation method is provided to solve the force imbalance problem of the four sets of servo actuators. Finally, the device can follow the change of the static force in real time and quickly during the vibration process without being affected by the dynamic exciting force, and the electric vibration table can be kept in the best exciting state near the working middle position.

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