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[CN 202110259949.3] Feedforward compensation control system and method for improving passive leveling system of hydraulic press
[CN 202110259949.3] A Feedforward Compensation Control System and Method for Improving Passive Leveling System of Hydraulic Press Title: A Feedforward Compensation Control System and Method for Improving Passive Leveling System of Hydraulic Press Application Number: CN 202110259949.3 Applicant: Fuzhou University Application Date: 2021-3-10 Patent Type: Invention Application The present invention relates to a feedforward compensation control system and method for improving passive leveling system of hydraulic press. In the no-load leveling phase, through the first valve compensation signal operation module, Kalman filtering is carried out on the actual speed of the movable beam and the valve compensation value at this stage is calculated and output. Through the change of the spool feedback signal of the leveling control valve in the previous pressing cycle, the parameter optimization of the current circulating valve compensation calculation is realized, and then the best match between the outlet flow of the lower chamber of the leveling cylinder and the variable speed movement of the movable beam is realized, and the pressure of the lower chamber of the lower chamber of the leveling cylinder is reduced, the energy consumption of the master cylinder is further reduced. In the pre-load leveling stage, the valve compensation value calculated by the second valve compensation calculation module for the former is attenuated to a smaller value by the optimal transition curve with slow attenuation in the front section and fast attenuation in the rear section, so as to realize the smooth transition rise of the master cylinder pressure and the leveling cylinder pressure, and make the master cylinder position tracking and leveling steady-state accuracy better in the subsequent load leveling stage.
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