Power plants – Pressure fluid source and motor – Methods of operation
Patent
1995-07-05
1997-09-16
Nguyen, Hoang
Power plants
Pressure fluid source and motor
Methods of operation
60496, 60452, 91361, F16D 3102, F15B 1316
Patent
active
056668066
ABSTRACT:
Apparatus and method for controlling at least one hydraulic cylinder by the hydraulic fluid discharged by a hydraulic pump through a control valve. The hydraulic control system includes sensors to sense the conditions of the system and produce responsive signals. In the first stage, a controller determines an initial pump displacement output value and an initial spool displacement output value as a function of the system condition signals according to a plurality of feedback linearization control laws. In the second stage, a second controller produces an output signal for the hydraulic pump and an output signal for the control valve as a function of the initial pump displacement output value, the initial spool displacement value and an input command signal according to linear control laws.
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Bluth Thomas J.
Caterpillar Inc.
Kibby Steven G.
Nguyen Hoang
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