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Keywords: Separate control of actuator ports; Static operation point; ADRC; Pressure control Abstract. For a valve controlled cylinder speed system with separate control of actuator ports, combining static operation point theory and load sensitivity technology, a new pressure control method is proposed. An optimal pressure based on command speed and load force was the input of pressure controller. At the same time, the output of pressure controller was transformed by inverse proportion, and dynamic pressure control based on error was realized. ADRC (active disturbance rejection control) was used for system simulation. The results show that the new pressure control method is realizable and doesn't need system's mathematic model.

A New Pressure Control Method in the System with Separate Control of Actuator Ports