IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0393157
(2009-02-26)
|
등록번호 |
US-8517303
(2013-08-27)
|
우선권정보 |
DE-10 2008 011 791 (2008-02-29) |
발명자
/ 주소 |
- Dilmaghani, Homayoun
- Bohlen, Carsten
|
출원인 / 주소 |
|
대리인 / 주소 |
Lerner, David, Littenberg, Krumholz & Mentlik, LLP
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
7 |
초록
▼
The invention relates to a powered wheel system for an aircraft, comprising at least one undercarriage with several rotatably held wheels, with the powered wheel system comprising two or more motors of which in each case at least one motor is coupled to at least one of the wheels, and comprising at
The invention relates to a powered wheel system for an aircraft, comprising at least one undercarriage with several rotatably held wheels, with the powered wheel system comprising two or more motors of which in each case at least one motor is coupled to at least one of the wheels, and comprising at least one control device that is coupled to the motors. A control device is equipped to control operation of the motors independently of each other as far as their respective rotary speeds and direction of rotation are concerned, so that the system is able, among other things, to effect taxiing; by means of rotary speed differentials on different motors to be able to steer the aircraft; prior to landing to bring the wheel circumference speeds to landing speed; and to boost the undercarriage brakes of the aircraft. Furthermore, by means of an improvement of the system according to the invention, the rotary speeds of the wheels may be determined with precision. The invention furthermore relates to a method for driving wheels of an aircraft.
대표청구항
▼
1. A powered wheel system for an aircraft, comprising: two or more undercarriages, each of the two or more undercarriages including:at least two rotatably held wheels, and two or more motors, with each motor coupled to a respective one of the at least two wheels; andat least one control device coupl
1. A powered wheel system for an aircraft, comprising: two or more undercarriages, each of the two or more undercarriages including:at least two rotatably held wheels, and two or more motors, with each motor coupled to a respective one of the at least two wheels; andat least one control device coupled to at least two of the two or more motors of each of the two or more undercarriages;and an evaluation unit;wherein the control device is equipped to control the respective rotary speeds or directions of rotation of the two or more motors of each of the two or more undercarriages independently of each other;wherein the coupling between the at least one of the two or more motors of the respective undercarriage and the respective one of the at least two wheels of the respective undercarriage is configured to be selectively undone or maintained during operation of the aircraft; andwherein the evaluation unit is configured to determine, from the rotation of at least one of the two or more motors of a respective one of the two or more undercarriages, the rotary speed of the other of the two or more motors of the respective one of the two or more undercarriages or the roll speed of the aircraft. 2. The powered wheel system of claim 1, wherein the control device is equipped for driving at least two of the two or more motors of each of the two or more undercarriages with a difference in their respective rotary speeds or a difference in their respective directions of rotation relative to each other for steering the aircraft when situated on the ground. 3. The powered wheel system of claim 2, wherein a steering movement results from a control input to the control device, andthe control device is equipped to calculate the difference in the respective rotary speeds of at least two of the two or more motors of at least one of the two or more undercarriages which is necessary with reference to the geometric variables of the aircraft and of the at least one of the two or more undercarriages. 4. The powered wheel system of claim 1, wherein the control device is equipped, for the purpose of reducing the landing shock, to drive the two or more motors of at least one of the two or more undercarriages to rotate in the forward direction immediately prior to the aircraft landing, andwherein the control device is configured to calculate the necessary rotary speed, taking into account true air speed data and airframe attitude data. 5. The powered wheel system of claim 1, wherein the control device is equipped, for the purpose of boosting brakes of the aircraft, to drive the two or more motors of at least one of the two or more undercarriages for generating torque that acts against the direction of roll, andwherein the control device calculates the motor control variables that are necessary, taking into account the roll speed, the state of a runway and the length of the runway. 6. The powered wheel system of claim 1, wherein at least one of the two or more motors of at least one of the two or more undercarriages is configured to be coupled to at least one fan wheel for cooling at least one of the brakes of the aircraft. 7. The powered wheel system of claim 1, wherein the at least one of the two or more motors of the respective at least one of the two or more undercarriages is coupled to the respective one of the at least two wheels of the respective at least one of the two or more undercarriages by way of a disengageable mechanical clutch. 8. The powered wheel system of claim 1, wherein the control device is equipped to drive at least two of the two or more motors of at least one of the two or more undercarriages for moving the aircraft in forward- and reverse-directions on the ground, wherein the respective rotary speeds and the respective directions of rotation of the two or more motors of the at least one of the two or more undercarriages are calculated on the basis of control input in the cockpit or from the outside. 9. The powered wheel system of claim 1, wherein at least one of the two or more motors of at least one of the two or more undercarriages comprises an electric motor operated by a member selected from the group consisting of an engine generator, an auxiliary power unit, a fuel cell, an external power supply and a battery. 10. The powered wheel system of claim 1, wherein the evaluation unit is located externally of or is integrated in the at least one of the two or more motors of the respective one of the two or more undercarriages. 11. The powered wheel system of claim 1, wherein at least one of the two or more motors of at least one of the two or more undercarriages comprises a hydraulic motor or a pneumatic motor. 12. The powered wheel system of claim 1, wherein the two or more motors of at least one of the two or more undercarriages are integrated in hubs of the at least two wheels of the at least one of the two or more undercarriages. 13. The powered wheel system of claim 1, wherein the control device is configured to transmit digital signals to the two or more motors of each of the two or more undercarriages, andwherein the signals transmitted to the two or more motors of each of the two or more undercarriages are received by at least one control unit and are converted to control variables for the two or more motors of each of the two or more undercarriages. 14. The powered wheel system of claim 1, wherein the control device is configured to transmit analog signals to the two or more motors of each of the two or more undercarriages. 15. A method for driving wheels of an aircraft including two or more undercarriages each with at least two rotatably held wheels and at least two motors disengageably coupled to respective ones of the at least two rotatably held wheels, the method comprising: driving, independently of each other, at least one of the at least two motors of each of the two or more undercarriages to control their respective rotary speeds or their respective directions of rotation based on input from a control device; anddetermining, by an evaluation unit, from the rotation of at least one of the two motors of a respective one of the two or more undercarriages, the rotary speed of the other of the two motors of the respective one of the two or more undercarriages or the roll speed of the aircraft; wherein the coupling between the at least one of the atleast two motors of a respective undercarriage and the respective one of the at least two rotatably held wheels of the respective undercarriage is configured to be selectively undone or maintained during operation of the aircraft. 16. The method of claim 15, further comprising driving the at least two motors of each of the two or more undercarriages by the control device with a difference in at least one of the respective rotary speeds and the respective directions of rotation thereof for the purpose of steering the aircraft while situated on the ground. 17. The method of claim 16, further comprising calculating by the control device the difference in the at least one of the respective rotary speeds and the respective directions of rotation which is necessary, with reference to the geometric variables of the aircraft and of the two or more undercarriages. 18. The method of claim 16, further comprising driving by the control device, for the purpose of reducing the landing shock, at least two motors of at least one of the two or more undercarriages to rotate in the forward direction immediately prior to the aircraft landing; andcalculating by the control device the necessary rotary speed, with reference to the true airspeed data and airframe attitude data. 19. The method of claim 15, further comprising driving by the control device, for boosting brakes of the aircraft, two or more of the at least two motors of at least one of the two or more undercarriages for the purpose of generating torque that acts against the direction of roll; andcalculating by the control device the necessary motor control variables, taking into account at least the roll speed, the state and the length of a runway. 20. An aircraft comprising a powered wheel system, the powered wheel system comprising: two or more undercarriages, each of the two or more undercarriages including:at least two rotatably held wheels, andtwo or more motors, with each motor coupled to a respective one of the at least two wheels;at least one control device coupled to at least two of the two or more motors of each of the two or more undercarriages;andan evaluation unit;wherein the control device is equipped to control the respective rotary speeds or directions of rotation of the two or more motors of each of the two or more undercarriages independently of each other;wherein the coupling between the at least one of the two or more motors of the respective undercarriage and the respective one of the at least two wheels of the respective undercarriage is configured to be selectively undone or maintained during operation of the aircraft; andwherein the evaluation unit is configured to determine, from the rotation of at least one of the two or more motors of a respective one of the two or more undercarriages, the rotary speed of the other of the two or more motors of the respective one of the two or more undercarriages or the roll speed of the aircraft. 21. A powered wheel system for an aircraft, comprising: at least one nosewheel gear undercarriage;at least one main undercarriage; andan evaluation unit;each of the at least one nosewheel gear undercarriage and the at least one main undercarriage including:first and second rotatably held wheels, andfirst and second motors, withthe first motor of the at least one nosewheel gear undercarriage coupled to the first rotatably held wheel of the at least one nosewheel gear undercarriage and the second motor of the at least one nosewheel gear undercarriage coupled to the second rotatably held wheel of the at least one nosewheel gear undercarriage, andthe first motor of the at least one main undercarriage coupled to the first rotatably held wheel of the at least one main undercarriage and the second motor of the at least one main undercarriage coupled to the second rotatably held wheel of the at least one main undercarriage; andat least one control device coupled to the first and second motors of each of the at least one nosewheel gear undercarriage and each of the at least one main undercarriage;wherein the control device is equipped to control operation of each of the first and second motors of each of the at least one nosewheel gear undercarriage and the at least one main undercarriage independently of each other;wherein the evaluation unit is configured to determine, from the rotation of at least one of the first and second motors of a respective one of the at least one nosewheel gear undercarriage and the at least one main undercarriage, therotary speed of the other of the first and second motors of the respective one of the at least one nosewheel gear undercarriage and the at least one main undercarriage or the roll speed of the aircraft. 22. The powered wheel system of claim 21, wherein the control device is equipped to control operation of each of the first and second motors of each of the at least one nosewheel gear undercarriage and the at least one main undercarriage independently of each other with regard to their respective rotary speeds or their respective directions of rotation. 23. The powered wheel system of claim 21, wherein the control device is configured to drive the first and second motors of the at least one nosewheel gear undercarriage with a difference in at least one of the respective rotary speeds and the respective directions of rotation thereof relative to each other; andwherein the control device is adapted configured to drive the first and second motors of the at least one main undercarriage with a difference in at least one of the respective rotary speeds and the respective directions of rotation thereof relative to each other.
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