Method for determining the speed of a rotocraft relative to the surrounding air
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01P-005/26
G01F-001/66
G01S-017/88
B64D-043/02
G01S-017/58
G01S-017/95
출원번호
US-0652770
(2013-12-20)
등록번호
US-10054606
(2018-08-21)
우선권정보
FR-12 03618 (2012-12-28)
국제출원번호
PCT/EP2013/077620
(2013-12-20)
국제공개번호
WO2014/102175
(2014-07-03)
발명자
/ 주소
Rondeau, Philippe
Schlotterbeck, Jean-Pierre
Lacondemine, Xavier
출원인 / 주소
Thales
대리인 / 주소
Davis Wright Tremaine LLP
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
A method for determining the speed vector ({right arrow over (Vd)}), with respect to the surrounding air, of a rotary wing aircraft (HL) equipped with a beam scanning Doppler laser anemometry device for measuring (Step1) a set of projections (Vm) of said speed vector ({right arrow over (Vd)}) in at
A method for determining the speed vector ({right arrow over (Vd)}), with respect to the surrounding air, of a rotary wing aircraft (HL) equipped with a beam scanning Doppler laser anemometry device for measuring (Step1) a set of projections (Vm) of said speed vector ({right arrow over (Vd)}) in at least four non-coplanar directions, comprising the following steps: detecting (Step2) any anomaly of at least one element from the set of measured projections (Vm), from a comparison with respect to a first threshold (S1), of a deviation between the measurements (Vm) and the measurements (Vp) predicted from a predetermined model depending on values of beam scanning parameters of the anemometry device; andreducing (Step3) the effect of a detected anomaly by invalidating measurements corresponding to said anomaly and computing the components of the speed vector from valid measurements.
대표청구항▼
1. A method for determining a speed vector, with respect to the surrounding air, of a rotary wing aircraft equipped with a beam scanning Doppler laser anemometry device, configured for continuous scanning, for measuring a set of projections of the speed vector in at least four non-coplanar direction
1. A method for determining a speed vector, with respect to the surrounding air, of a rotary wing aircraft equipped with a beam scanning Doppler laser anemometry device, configured for continuous scanning, for measuring a set of projections of the speed vector in at least four non-coplanar directions, comprising the laser anemometry device performing the steps of: detecting any anomaly of at least one element from the set of measured projections of the speed vector, from a comparison with respect to a first threshold, of a deviation between the measurements of the set of projections and predicted measurements predicted from a predetermined model depending on values of beam scanning parameters of the anemometry device;reducing the effect of a detected anomaly by invalidating measurements corresponding to the anomaly;computing the components of the speed vector from measurements that have not been invalidated; andproviding the pilot of the rotary wing aircraft with a correct airspeed based on the measurements that have not been invalidated,wherein measuring the set of projections of the speed vector uses the beam scanning Doppler laser beam anemometry device to perform scanning in a conical-shaped volume having an apex angle greater than a second threshold. 2. The method as claimed in claim 1, further comprising estimating a conformity of the valid measurements with the model. 3. The method as claimed in claim 2, wherein estimating the conformity uses a standard deviation between the vector constituted by the measurements of the set of projections taken into account and a vector constituted by the corresponding predicted measurements. 4. The method as claimed in claim 3, characterized in that the standard deviation is computed by a sum of quadratic deviations or a sum of absolute deviations. 5. The method as claimed in claim 1, characterized in that the second threshold depends on operational parameters of the rotary wing aircraft, the operational parameters comprising the wingspan and/or the limit attitudes of the rotary wing aircraft. 6. The method as claimed in claim 1, wherein measuring the set of projections of the speed vector uses the beam scanning Doppler laser anemometry device to perform beam scanning according to a conical-shaped volume having a vertical axis extending from the apex of the cone when the aircraft is standing on the ground. 7. The method as claimed in claim 1, characterized in that the second threshold is greater than or equal to 60°. 8. The method as claimed in claim 1, characterized in that the second threshold is approximately equal to 109.4°. 9. The method as claimed in claim 1, wherein detecting any anomaly comprises: performing a spectral analysis in each measuring direction; anddetermining, from the spectral analysis, spectral lines corresponding to a useful signal and corresponding to a parasitic signal respectively for each measuring direction. 10. An aircraft comprising: an aircraft body;rotary wings; anda device for determining a speed vector, with respect to the surrounding air, of the rotary wing aircraft, the device comprising: a Doppler laser anemometry device with continuous beam scanning configured to measure a set of projections of a speed vector in at least four non-coplanar directions;the anemometry device being further configured to detect any anomaly of at least one element from the set of measured projections of the speed vector, from a comparison with respect to a first threshold, of a deviation between the measurements of the set of projections of the speed vector and predicted measurements predicted from a predetermined model depending on values of beam scanning parameters of the anemometry device, andbeing configured to reduce the effect of a detected anomaly by invalidating measurements corresponding to the detected anomaly and computing the components of the speed vector from measurements that have not been invalidated wherein the laser scanning is continuous scanning according to a conical-shaped volume wherein the conical-shaped volume has an apex angle greater than a second threshold and wherein the device is adapted to be mounted in such a way that the conical-shaped volume has a vertical axis extending from the apex of the conical-shaped volume when the aircraft is standing on the ground.
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이 특허에 인용된 특허 (2)
Werner Christian (Munich DEX) Kpp Friedrich (Munich CO DEX) Schwiesow Ronald (Boulder CO) Bachstein Felix (Munich DEX), Method for determining the direction and speed of wind in the atmosphere.
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