Power transmission

Patent · Tue May 03 00:00:00 EDT 1988

OSTI ID:6953880

Gunda, R; McCarty, M R; Rode, M A

This patent describes an electrohydraulic servo system which includes, in combination, a pressure compensated flow control servo valve for proportionally variably feeding hydraulic fluid to a load at a flow rate which is a predetermined proportional function of an electronic valve control signal, a variable output pump for coupling to a source of motive power to feed hydraulic fluid under pressure from a source to the servo valve, pump control means for controlling output of the pump, and an electronic servo control coupled to the valve and including means for receiving a first signal indicative of motion desired at the load, means for receiving a second signal indicative of actuation motion at the load and means for generating the valve control signal to the valve as a function of a difference between the first and second signals. The valve control signal is indicative of fluid flow velocity at the valve required to obtain the desired motion at the load, characterized in that the pump control means comprises: means for receiving the valve control signal, means for providing a signal indicative of fluid flow rate at the valve as the predetermined function of the valve control signal, and means for providing an output control signal to the pump as a function of the flow-indicative signal.

• Assignee: Vickers, Inc., Troy, MI
• Patent Number(s): US 4741159
• OSTI ID: 6953880
• Country of Publication: United States
• Language: English

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CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
ELECTRONIC EQUIPMENT
EQUIPMENT
FLOW RATE
FLOW REGULATORS
FLUID MECHANICS
FLUIDS
HYDRAULIC FLUIDS
HYDRAULICS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MECHANICS
PUMPS
SERVOMECHANISMS
VALVES
WORKING FLUIDS