Self-snubbing hydraulic actuation system

摘要

A self-snubbing hydraulic actuation system includes a hydraulic motor, a component actuator, a control valve, a valve actuator, and a variable resistance device. The hydraulic motor is configured, upon receipt of hydraulic fluid, to rotate and supply a drive torque. The component actuator is configured, upon receipt of drive torque from the motor, to translate to a position. The control valve is movable to a plurality of valve positions to thereby control hydraulic fluid flow rate to the hydraulic motor. The valve actuator is coupled to the control valve and is adapted to receive electrical current and to move the control valve to a valve position based on the magnitude of the received electrical current. The variable resistance device is configured, based on component actuator position, to selectively vary the magnitude of the electrical current received by the valve actuator.

主权项

1. A self-snubbing hydraulic actuation system, comprising:
a hydraulic motor adapted to selectively receive hydraulic fluid and configured, upon receipt of the hydraulic fluid, to rotate and supply a drive torque; a component actuator coupled to receive the drive torque supplied by the hydraulic motor and configured, upon receipt thereof, to translate to a position; a control valve in fluid communication with the hydraulic motor and movable to a plurality of valve positions to thereby control hydraulic fluid flow rate to the hydraulic motor; a valve actuator coupled to the control valve and adapted to receive electrical current at a magnitude, the valve actuator configured, upon receipt of the electrical current, to move the control valve to a valve position based on the magnitude of the received electrical current; and a variable resistance device mechanically coupled to the component actuator and electrically coupled to the valve actuator, the variable resistance device configured, based on the position of the component actuator, to selectively vary the magnitude of the electrical current received by the valve actuator, wherein:
the component actuator is configured to translate between a fully retracted position and a fully deployed position; andthe variable resistance device is configured to vary the magnitude of the electrical current only when the component actuator is:
(i) translating toward the fully retracted position and is between a first position and the fully retracted position, and(ii) translating toward the fully deployed position and is between a second position and the fully deployed position.