Method and apparatus for calibrating an electrohydraulic system

Details Method and apparatus for calibrating an electrohydraulic system Method and apparatus for calibrating an electrohydraulic system

1995-11-30

1997-04-22

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

G01P 2100

Patent

active

056230931

ABSTRACT:
In one aspect of the present invention, an apparatus and method for calibrating an electrohydraulic system is disclosed. In accordance with the present invention, a hydraulic valve that is responsive to an electrical valve signal controllably provides hydraulic fluid flow to a hydraulic actuator. A position sensor senses the position of the hydraulic actuator and responsively produces an actuator position signal. A microprocessor based controller receives the actuator position signal and determines when the hydraulic actuator begins movement, and associates the magnitude of the electrical valve signal to a first predetermined joystick position. Thereafter, the microprocessor based controller determines when the hydraulic actuator movement reaches terminal velocity and associates the magnitude of the electrical valve signal to a second predetermined joystick position.

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