Invention Grant
US08634967B2 Electrohydraulic pressure control arrangement and method for pressure control 失效
电液压力控制装置及压力控制方法

Electrohydraulic pressure control arrangement and method for pressure control
Abstract:
An electrohydraulic pressure control arrangement comprises a proportional pressure valve and a control loop structure. The control loop structure has a control path through which an actuating variable is fed to an actuating input of the proportional pressure valve starting from a setpoint pressure value. A pressure sensor detects an actual pressure value at a connection of the proportional pressure valve. A system model of a pressure valve assigns an estimated pressure value to the setpoint pressure value, and a subtraction element determines a control error as the difference between the estimated pressure value and the actual pressure value. A weighting element subjects the control error to a weighting operation and thus determines a weighted control error. The weighting element is designed such that relatively large control errors are attenuated to a greater extent than relatively small control errors.
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