The Character of the Dynamic Processes in the Proportional Servodriving Systems of the Hydraulic Pumps Capacity

Abstract

The proportional servodriving systems of hydraulics pump capacity are used in many more applications in tehnological equipments driving. Thus, the construction of specialized pumping hydraulics units, like the A10VG and A4VG Bosch-Rexroth pumps, with HD hydraulic proportional command, HW angular proportional mechanical command, EP electrical proportional command, it offer a wide posibilities for driving the tehnological equipments, at which the first condition required to the system is the proportinality beetween the command signal and the momentan value of pump capacity. Thus, it is obtained the proportinality beetween the command and the liniar or angular speed, for liniar or rotative hydraulic motors which drive the working body of the equipment. In the paper the authors elaborates the mathematical model for a look like servodriving system, deduces the mathematical expresions for dynamic parameters of servodriving control system, the transfer functions for the components and for the ensemble.