Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1989-01-19
1991-01-08
Smith, Leonard E.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
60448, 60911, F04B 120
Patent
active
049830996
ABSTRACT:
A control for a variable displacement hydraulic motor (12) is disclosed. The control includes an electrically controlled hydraulic servo valve (14) for controlling displacement of the hydraulic motor for varying position of a wobbler (28) in response to a servo valve control signal (92); a velocity transducer (72) coupled to a shaft (30) driven by the motor for producing a velocity signal (66) indicative of the velocity of the shaft; a controller (16) for producing the servo valve control signal, the controller including a first signal summer (70) which produces an output signal equal to a difference between a velocity command (68) and the velocity signal, the output signal being applied to an integrator (104) and to a proportional amplifier (76) to produce a wobble position command (82) which is a sum of outputs from the integrator and the proportional amplifier which is processed by the controller to produce the control signal.
REFERENCES:
patent: 3506896 (1970-04-01), Loos
patent: 3533236 (1970-10-01), Cottington
patent: 3741474 (1973-06-01), Kawada et al.
patent: 4139987 (1979-02-01), Budzich
patent: 4158290 (1979-06-01), Cornell
patent: 4475333 (1984-10-01), Tordenmalm
patent: 4486693 (1984-12-01), Hamati et al.
patent: 4487109 (1984-12-01), Burandt et al.
patent: 4627329 (1986-12-01), Durtschi
patent: 4635441 (1987-01-01), Ebbing et al.
patent: 4669058 (1987-05-01), Schneider et al.
patent: 4672811 (1987-06-01), Yoshida et al.
patent: 4726187 (1988-02-01), Reinhardt et al.
Smith Leonard E.
Sundstrand Corporation
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