Power transmission

Details Power transmission Power transmission

1985-03-07

1987-02-17

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

F15B 1316

Patent

active

046430741

ABSTRACT:
An electrohydraulic servo control system which includes a position feedback loop responsive to actual position at the hydraulic actuator and load, and a position command reference generator responsive to an operator joystick input command and to an operator mode select switch for generating a position command reference signal to the position loop as differing functions of the joystick input in each of the switch-selectable modes. The selectable modes of operation include an absolute position control mode wherein the joystick input is treated as indicating absolute desired position at the actuator and load, an incremental position control mode wherein the joystick input is treated as indicating desired change in position with reference to a base position, and a velocity control mode wherein the joystick input is treated as indicating velocity at the actuator and load desired by the operator.

REFERENCES:
patent: 2777285 (1957-01-01), McDonald
patent: 3038451 (1962-06-01), Sporn et al.
patent: 3410177 (1968-11-01), Roess et al.

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