Patent ID: 8634967
Filing Date: 2014-01-21
Classification: G05B

Abstract:
1. An electrohydraulic pressure control arrangement for controlling the pressure of a pressure medium, comprising a proportional pressure valve and a control loop structure, with the control loop structure having: 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 which detects an actual pressure value at a connection of the proportional pressure valve, a system model of a pressure valve, which system model assigns an estimated pressure value to the setpoint pressure value, a subtraction element which determines a control error as the difference between the estimated pressure value and the actual pressure value, a weighting element which subjects the control error to a weighting operation that attenuates the control error to produce a weighted control error, and a controller which receives the weighted control error and modifies the signal on the control path during operation on the basis of the weighted control error, wherein the weighting element is designed such that control errors that are outside of a parameterized passband are attenuated by a greater amount than control errors that are within the parameterized passband when producing weighted control errors.