Electro-hydraulic actuator system
AssigneeNorthrop Grumman Corporation
InventorYuhang Ho
Life of this patent
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Abstract
The system includes a hydraulic powered actuator. A pump system having first and second hydraulic lines is coupled to the first and second ports, respectively and is capable of providing hydraulic fluid to either the first and second lines. First and second pressure sensors are coupled to the first and second lines, respectively. A third line is coupled between the first and second lines and includes first and second valves mounted in series therein. Preferably, the first and second valves are capable of latching in the open position. A reservoir is coupled to the third line between the first and second valves. A shut off valve is included for cutting off the flow from the reservoir.
Claims8
An electro-mechanical hydraulic system comprising;
- a hydraulic powered actuator having first and second ports for receiving hydraulic fluid for extending and retracting the actuator, respectively;
- position sensor means for monitoring the position of said actuator;
- a pump system having first and second hydraulic lines coupled to said first and second ports, respectively;
- said pump system capable of providing hydraulic fluid to either said first and second lines;
- first and second pressure sensors coupled to said first and second lines, respectively;
- a third line coupled between said first and second lines;
- first and second valves mounted in series in said third line;
- a reservoir coupled to said third line between said first and second valves;
- and
- control means for monitoring said pressure sensors and said position sensor means and controlling the opening and closing of said first and second valves and the output of said pump means in response to a command signal.
Dependencies are inferred from the claim text.