Drift compensation control method for a machine

Details Drift compensation control method for a machine Drift compensation control method for a machine

2006-10-17

2010-12-07

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

C060S459000, C091S459000

Reexamination Certificate

active

07845169

ABSTRACT:
A method of controlling a machine having a hydraulically actuated linkage includes lowering a load suspended by the leakage at least in part by leaking hydraulic fluid from a portion of a hydraulic actuation system, and generating a drift compensation control signal responsive to leaking hydraulic fluid. A machine includes an electronic controller in control communication with a valve, the electronic controller being configured to compensate for leakage induced drift of at least one hydraulic actuator of a machine hydraulic system by selectively commanding adjusting of the valve if drift criteria for the hydraulic system are satisfied.

REFERENCES:
patent: 3938669 (1976-02-01), Vinton
patent: 4951549 (1990-08-01), Olsen et al.
patent: 5230272 (1993-07-01), Schmitz
patent: 5743165 (1998-04-01), Tanaka et al.
patent: 2005/0011190 (2005-01-01), Bitter
patent: 2006/0064971 (2006-03-01), Reedy et al.

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