EINRICHTUNG ZUM REGELN DER LAGE EINES HYDRAULISCHEN VORSCHUBANTRIEBS, INSBESONDERE EINER HYDRAULISCHEN PRESSE ODER STANZE.

摘要

The position (x), velocity (v) and acceleration (aB) of the piston are taken into consideration by the controller (R), to which position and velocity signals are supplied from conventional measuring devices. The acceleration (aB) is evaluated by a monitor (B) from measurements of the velocity (v) and of the pressure (p) of the hydraulic fluid, avoiding the expense of direct measurement of the acceleration itself. The monitor (B) also produces a disturbance magnitude signal (fzB) for subtraction from the output of the controller (R) for purposes of compensation of e.g. friction in the input signal (u) to the positioning element (SG).