초록 ▼

A system (10) of parallel hydraulic actuators (15) and (20) includes a pair of laterally spaced, longitudinally extending, discrete feedback levers (180) and (185) which independently provide feedback signals to a pair of actuator control valves (50) and (55) with enhanced accuracy and minimal later

A system (10) of parallel hydraulic actuators (15) and (20) includes a pair of laterally spaced, longitudinally extending, discrete feedback levers (180) and (185) which independently provide feedback signals to a pair of actuator control valves (50) and (55) with enhanced accuracy and minimal lateral loading of the system.

대표청구항 ▼

In an hydraulic actuator system comprising a pair of parallel hydraulic actuators, each actuator comprising a cylinder rigidly connected to the cylinder of the other actuator and an output member reciprocally displaceable with respect to the cylinder and rigidly connected to the output member of the

In an hydraulic actuator system comprising a pair of parallel hydraulic actuators, each actuator comprising a cylinder rigidly connected to the cylinder of the other actuator and an output member reciprocally displaceable with respect to the cylinder and rigidly connected to the output member of the other actuator; said actuator system further comprising a pair of control valves, each controlling the pressurization of an associated actuator; an idler linkage; an input linkage connected to said control valves and to said idler linkage for movement thereon, said input linkage being adapted for simultaneously applying an input signal to each of said control valves; and a feedback linkage connected to said output members and to said idler linkage for applying a feedback signal to said control valves by means of said idler and input linkages in response to movement of said output members; said hydraulic actuator system being characterized by: said idler linkage comprising first and second independently movable, discrete idler levers pivotally grounded to said first and second actuators, respectively; said feedback linkage comprising first and second laterally spaced, discrete feedback levers pivotally connected to both said first and second idler levers, respectively, and to said output members; whereby imbalanced operation of said actuator system resulting in longitudinal displacement of said connected output members effects independent longitudinal displacement of said feedback levers relative to one another for independent, redundant application of said feedback signals to said control valves with enhanced accuracy and predictability and reduced linkage stress.