Rotorcraft with electrically driven blade control
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0715927
(2010-03-02)
|
등록번호 |
US-8235324
(2012-08-07)
|
발명자
/ 주소 |
- Birch, Matthew C.
- Sowle, Zak
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
1 |
초록
▼
A helicopter uses multiple redundant harmonic drive motors on the rotor head to actuate the angle of attack of rotor blades at the rotor blade roots, providing collective control that, in combination with a system for providing cyclic control on the rotor blades, eliminates the need for a swashplate
A helicopter uses multiple redundant harmonic drive motors on the rotor head to actuate the angle of attack of rotor blades at the rotor blade roots, providing collective control that, in combination with a system for providing cyclic control on the rotor blades, eliminates the need for a swashplate, thereby advantageously reducing the weight and maintenance cost of the helicopter, increasing its reliability, and reducing its vulnerability to ballistic attack.
대표청구항
▼
1. A helicopter comprising: a chassis; and a rotor comprising a rotor head;at least two blades mounted to the rotor head, each blade having a blade root;at least one electrically-driven actuator that rotates along with the rotor head and adjusts the angle of attack of at least one of the at least tw
1. A helicopter comprising: a chassis; and a rotor comprising a rotor head;at least two blades mounted to the rotor head, each blade having a blade root;at least one electrically-driven actuator that rotates along with the rotor head and adjusts the angle of attack of at least one of the at least two rotor blades by rotating the blade at the blade rootwherein the at least one electrically-driven actuator comprises a zero-backlash transmission. 2. The helicopter of claim 1, wherein the helicopter does not have a swashplate. 3. The helicopter of claim 1, wherein the at least one electrically-driven actuator is a harmonic drive motor. 4. The helicopter of claim 1, wherein the at least one electrically-driven actuator is a cycloidal drive motor. 5. The helicopter of claim 1, wherein the at least one electrically-driven actuator is a wobble motor. 6. The helicopter of claim 1, wherein at least two electrically-driven actuators are adapted to rotate along with the rotor head for adjusting the angle of attack of all of the at least two rotor blades. 7. The helicopter of claim 6, wherein at least one of the electrically-driven actuators is equipped to be mechanically decoupled from the rotor in the event that the actuator becomes disabled. 8. The helicopter of claim 6, wherein fewer than all of the at least two electrically-driven actuators are capable of adjusting the angle of attack of all of the at least two rotor blades. 9. A helicopter comprising: a chassis; and a rotor comprising a rotor head;at least two blades mounted to the rotor head, each blade having a blade root;at least two electrically-driven actuators that rotate along with the rotor head and adjust the angle of attack of at least one of the at least two rotor blades by rotating the blade at the blade rootwherein fewer than all of the electrically-driven actuators are capable of collectively adjusting the angle of attack of all of the at least two rotor blades at the blade root. 10. The helicopter of claim 9, wherein the at least two electrically-driven actuators comprise zero-backlash transmissions. 11. The helicopter of claim 9, wherein helicopter does not have a swashplate. 12. The helicopter of claim 9, wherein the at least two electrically-driven actuators are harmonic drive motors. 13. The helicopter of claim 9, wherein the at least two electrically-driven actuators are cycloidal drive motors. 14. The helicopter of claim 9, wherein the at least two electrically-driven actuators are wobble motors. 15. The helicopter of claim 9, wherein each of the at least two electrically-driven actuators is equipped to be mechanically decoupled from the rotor in the event that the actuator becomes disabled. 16. A helicopter comprising: a chassis; and a rotor comprising a rotor head;at least two blades mounted to the rotor head, each blade having a blade root;one or more electrically-driven actuators that rotate along with the rotor head and adjust the angle of attack of at least one of the at least two rotor blades by rotating the blade at the blade rootwherein fewer electrically-driven actuators than rotor blades are capable of adjusting the angle of attack of all of the at least two rotor blades at the blade root. 17. The helicopter of claim 16, wherein at least one of the electrically-driven actuators comprises a zero-backlash transmission. 18. The helicopter of claim 17, wherein the zero-backlash transmission is a harmonic drive transmission. 19. The helicopter of claim 16, wherein at least one of the electrically-driven actuators further comprises an encoder for indicating the position of the actuator. 20. The helicopter of claim 16, wherein at least two electrically-driven actuators are adapted to rotate along with the rotor head for adjusting the angle of attack of all of the at least two rotor blades, and wherein each of the at least two electrically-driven actuators is equipped to be mechanically decoupled from the rotor in the event that the actuator becomes disabled.
이 특허에 인용된 특허 (1)
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Stearns ; Jr. Hoyt A. (4131 E. Cannon Dr. Phoenix AZ 85028), High speed helicopter.
이 특허를 인용한 특허 (5)
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Knag, John; Litwinowicz, Anthony, Controlling rotor blades of a swashplateless rotor.
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Mayrides, Bryan D.; Welsh, William A.; DeVita, Michael Joseph; Lauder, Timothy Fred, Integration of rotary electrical actuator for swashplateless individual blade control.
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Bigbee-Hansen, William J.; Clingman, Dan J.; Mabe, James H., Shape memory alloy-actuated propeller blades and shape memory alloy-actuated propeller assemblies.
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Knight, Michael Bruce; Fanning, John Charles; Helvin, James Rogers; Jones, Mark Alan; Lawrence, III, Norman Edwin; Schmidt, Damon, Transportable radar utilizing a fiber optic rotary joint for communication of radar reflectivity data and harmonic drives for positioning the antenna.
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Knight, Michael Bruce; Fanning, John Charles; Helvin, James Rogers; Jones, Mark Alan; Lawrence, III, Norman Edwin; Schmidt, Damon, Transportable radar utilizing harmonic drives for anti-backlash antenna movement.
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