摘要 |
A control system is disclosed for hydraulic drives, in particular hydraulic cylinders, in which the valve that controls the hydraulic medium flow paths between the drive, the hydraulic medium source and a tank may be controlled by an electronic control system. Drive state variables are detected by a pressure sensor and by a circuit that differentiates the pressure measurement value in time. The pressure change signal is used to drive the valve, to improve control characteristics by means of a state control system, to attenuate vibrations in the flow medium or to reduce knocking noises produced by punching, nibbling or shearing machines.
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申请人 |
MANNESMANN REXROTH GMBH, 97816 LOHR, DE |
发明人 |
SCHMIDT, STEFAN, 97816 LOHR, DE;REINERT, MICHAEL, 97816 LOHR, DE;NEUMANN, JOACHIM, 97816 LOHR, DE |