초록 ▼

Disclosed is a stiffness enhanced electrohydrostatic actuator for aircraft flight controls which eliminates the requirement for a central hydraulic system. The actuator replicates the blocked port condition of the central hydraulic system to provide static and dynamic stiffness by the use of valves

Disclosed is a stiffness enhanced electrohydrostatic actuator for aircraft flight controls which eliminates the requirement for a central hydraulic system. The actuator replicates the blocked port condition of the central hydraulic system to provide static and dynamic stiffness by the use of valves having a first sleeve and spool and a second sleeve and spool disposed on either side of a valve seat with the first spool biased towards the valve seat.

대표청구항 ▼

An enhanced stiffness electrohydrostatic actuator, comprising: an actuator including an extend chamber and a retract chamber which are separated by a piston having an actuator ram extending therefrom; and a hydraulic system fluidly coupled to said actuator and comprising: an extend valve fluidly cou

An enhanced stiffness electrohydrostatic actuator, comprising: an actuator including an extend chamber and a retract chamber which are separated by a piston having an actuator ram extending therefrom; and a hydraulic system fluidly coupled to said actuator and comprising: an extend valve fluidly coupled to said extend chamber; a retract valve fluidly coupled to said retract chamber; and a hydraulic pump fluidly coupled to said extend and retract valves for alternatively supplying high pressure hydraulic fluid to said extend chamber via said extend valve and said retract chamber via said retract valve; said extend and retract valves being in fluid communication with said actuator, said pump, and each other, and operable to isolate said extend and retract chambers from said pump when static loads and high frequency oscillating loads are applied to said actuator ram.