Vehicles commonly include control-surfaces and other components that are selectively moved during operation among a plurality of positions. Movement of aircraft control-surface components is crucial in flight, and an actuating assembly must consistently and dependably perform during normal operation
Vehicles commonly include control-surfaces and other components that are selectively moved during operation among a plurality of positions. Movement of aircraft control-surface components is crucial in flight, and an actuating assembly must consistently and dependably perform during normal operation and be prepared to survive situations outside normal operation and/or to compensate for circumstances causing loss of actuator control. Jam tolerant electromechanically operated actuation systems, of both the rotary and linear types, together with their methods of operation are described herein. Specifically, electrical jam-detection and control systems and associated locking and damping devices can be electrically and mechanically engaged and disengaged, are automatically reversible, and are testable.
대표청구항▼
1. An electromechanical actuator, comprising: a motor having a motor drive train that drives a first driven member, the first driven member operatively engaged with a second driven member that is axially movable relative to the first driven member to control movement of an output rod connected to a
1. An electromechanical actuator, comprising: a motor having a motor drive train that drives a first driven member, the first driven member operatively engaged with a second driven member that is axially movable relative to the first driven member to control movement of an output rod connected to a movable surface;a damper assembly selectively coupled to the output rod and including a damper and a damper drive train, wherein,in a normal motor operating state, the output rod is coupled to the second driven member to thereby control movement of the movable surface with the motor; andin a motor malfunction state, the damper assembly is engaged with the output rod to provide a controlled rate of return of the movable surface to a fail-safe position, andwherein the damper assembly further includes a latch that restricts movement of the output rod in a fail-safe mode of the actuator and thereby restricts movement of the movable surface. 2. The electromechanical actuator of claim 1, wherein the damper assembly further includes a damper detent mechanism which couples the output rod to the damper in a normal damper operating state and which decouples the output rod from the damper in a damper malfunction state. 3. The electromechanical actuator of claim 1, wherein the damper assembly includes a first damper driven member coupled to the damper drive train, a second damper driven member coupled to and axially movable relative to the first damper driven member, and wherein the latch engages the second damper driven member in the fail-safe mode to thereby limit movement of the second damper driven member relative to the first damper driven member. 4. The electromechanical actuator of claim 1 wherein one of the first or second driven members is a nut, the actuator further comprising: a nut disconnect system including at least one coupler key movable between a locked position, in which the key maintains coupling between the output rod and the nut to thereby control movement of the output rod with the motor, and an unlocked position, in which the key decouples the output rod from the nut to thereby remove control of the output rod from the motor. 5. The electromechanical actuating assembly of claim 4, wherein the nut disconnect system includes a release mechanism operable to decouple the nut from the output rod by moving the key to the unlocked position. 6. The electromechanical actuating assembly of claim 5, wherein the release mechanism is powered by stored energy electronics that automatically release stored energy to activate the release mechanism upon a loss of power to the electromechanical actuating assembly. 7. The electromechanical actuating assembly of claim 6, wherein the nut disconnect system includes a drive mechanism coupled to the stored energy electronics and the release mechanism, the drive mechanism transmitting the stored energy from the stored energy electronics to the release mechanism to move the coupler key to the unlocked position. 8. The electromechanical actuating assembly of claim 4, wherein the damper assembly further includes a latch mechanism that restricts movement of the nut in a fail-safe mode. 9. The electromechanical actuating assembly of claim 8, further comprising a damper detent mechanism that couples the output rod to the damper in a normal damper operating state and that decouples the output rod from the damper in a damper malfunction state, wherein a drive mechanism is configured to provide the following operations in sequence: (i) lock the damper detent mechanism; (ii) trigger an electrical switch to enable the damper; (iii) enable the latch mechanism that restricts movement of the nut in fail-safe mode; and (iv) decouple the nut from the output rod. 10. The electromechanical actuating assembly of claim 9, further comprising stored energy electronics that automatically release stored energy to activate the drive mechanism, wherein the stored-energy electronics include a reset mechanism including a motor and a drive that reverses the sequence of operations of the drive mechanism. 11. An electromechanical actuator, comprising: a motor having a motor drive train that drives a first driven member, the first driven member operatively engaged with a second driven member that is axially movable relative to the first driven member to control movement of an output rod connected to a movable surface;a damper assembly selectively coupled to the output rod and including a damper and a damper drive train, the damper drive train operable in parallel relation to the motor drive train, wherein,in a normal motor operating state, the output rod is coupled to the second driven member to thereby control movement of the movable surface with the motor; andin a motor malfunction state, the damper assembly is engaged with the output rod to provide a controlled rate of return of the movable surface to a fail-safe position. 12. The electromechanical actuator of claim 11, wherein the damper assembly further includes a damper detent mechanism which couples the output rod to the damper in a normal damper operating state and which decouples the output rod from the damper in a damper malfunction state. 13. The electromechanical actuator of claim 11, the damper assembly further including a latch that restricts movement of the output rod in a fail-safe mode of the actuator and thereby restricts movement of the movable surface, wherein the damper assembly includes a first damper driven member coupled to the damper drive train, a second damper driven member coupled to and axially movable relative to the first damper driven member, andwherein the latch engages the second damper driven member in the fail-safe mode to thereby limit movement of the second damper driven member relative to the first damper driven member. 14. The electromechanical actuator of claim 11 wherein one of the first or second driven members is a nut, the actuator further comprising: a nut disconnect system including at least one coupler key movable between a locked position, in which the key maintains coupling between the output rod and the nut to thereby control movement of the output rod with the motor, and an unlocked position, in which the key decouples the output rod from the nut to thereby remove control of the output rod from the motor. 15. The electromechanical actuating assembly of claim 14, wherein the nut disconnect system includes a release mechanism operable to decouple the nut from the output rod by moving the key to the unlocked position. 16. The electromechanical actuating assembly of claim 15, wherein the release mechanism is powered by stored energy electronics that automatically release stored energy to activate the release mechanism upon a loss of power to the electromechanical actuating assembly. 17. The electromechanical actuating assembly of claim 16, wherein the nut disconnect system includes a drive mechanism coupled to the stored energy electronics and the release mechanism, the drive mechanism transmitting the stored energy from the stored energy electronics to the release mechanism to move the coupler key to the unlocked position. 18. The electromechanical actuating assembly of claim 14, wherein the damper assembly further includes a latch mechanism that restricts movement of the nut in a fail-safe mode. 19. The electromechanical actuating assembly of claim 18, further comprising a damper detent mechanism which couples the output rod to the damper in a normal damper operating state and which decouples the output rod from the damper in a damper malfunction state, wherein a drive mechanism is configured to provide the following operations in sequence: (i) lock the damper detent mechanism; (ii) trigger an electrical switch to enable the damper; (iii) enable the latch mechanism that restricts movement of the nut in fail-safe mode; and (iv) decouple the nut from the output rod. 20. The electromechanical actuating assembly of claim 19, further comprising stored energy electronics that automatically release stored energy to activate the drive mechanism, wherein the stored-energy electronics include a reset mechanism including a motor and a drive that reverses the sequence of operations of the drive mechanism.
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이 특허에 인용된 특허 (9)
Nagai,Shigekazu; Saitoh,Akio; Sugiyama,Toru; Masui,Ryuichi; Hirose,Takeshi; Miyahara,Masaki, Actuator control system.
Blanding,David E.; Watanabe,Atsuo J., Fault-tolerant electro-mechanical actuator having motor armatures to drive a ram and having an armature release mechanism.
Senegas, David; Mehez, Jerome; Jestin, Maxime; Sevagen, Bertrand, Electromechanical actuator for an aircraft control surface, and an aircraft provided with such an actuator.
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