Autonomous kinematic measurement system for helicopters
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01C-021/10
G05D-001/00
출원번호
US-0155559
(1988-02-11)
우선권정보
FR-0001770 (1987-02-12)
발명자
/ 주소
Favre Helene (Massy FRX) Audren Jean T. (Orsay FRX)
출원인 / 주소
Societe de Fabrication d\Instruments de Mesure (S.F.I.M.) (Massy FRX 03)
인용정보
피인용 횟수 :
4인용 특허 :
9
초록▼
An autonomous kinematic measurement system for helicopters is disclosed. A helicopter comprises a lifting rotor, an anti-torque rotor, first means to control the cyclical pitch and the collective pitch of the rotor and second means to control the pitch of the anti-torque rotor. The system comprises
An autonomous kinematic measurement system for helicopters is disclosed. A helicopter comprises a lifting rotor, an anti-torque rotor, first means to control the cyclical pitch and the collective pitch of the rotor and second means to control the pitch of the anti-torque rotor. The system comprises means to measure the helicopter\s ground speed, means to measure the longitudinal cyclical pitch of the lifting rotor blades, means to measure the lateral cyclical pitch of the lifting rotor blades, means to measure the collective pitch given to the lifting rotor blades, and means to measure the pitch of the anti-torque rotor. An inertial unit, provided with ancillary computing means, uses a direction signal and a helicopter attitude signal corresponding to the longitudinal acceleration signal and lateral acceleration signal of the helicopter\s ground speed signal to establish the helicopter\s longitudinal and lateral airspeed values, following a determination of the coefficients abab
대표청구항▼
An autonomous kinematic measurement system for a helicopter, said helicopter comprising a lifting rotor (Ros), an anti=torque rotor (Rac), first means to control the cyclic pitch (Pc) and the collective pitch (Pcol) of the lifting rotor (Ros) and second means to control the anti-torque rotor pitch (
An autonomous kinematic measurement system for a helicopter, said helicopter comprising a lifting rotor (Ros), an anti=torque rotor (Rac), first means to control the cyclic pitch (Pc) and the collective pitch (Pcol) of the lifting rotor (Ros) and second means to control the anti-torque rotor pitch (Pac) wherein, longitudinal x and transversal y directions being defined through reference axes x, y, bound to the helicopter\s center of gravity and defining, with the helicopter on the ground, a plane parallel to the ground, said system comprises means to measure the helicopter\s ground speed, said means generating, during operation, a signal (Vs) of the helicopter\s ground speed, means to measure the longitudinal cyclic pitch (Pcx) of the lifting rotor (Ros) blades, said means giving a longitudinal cyclic pitch measurement signal (Pcx), means to measure the lateral cyclic pitch (Pcy) of the lifting rotor (Ros) blades, said means giving a lateral cyclic pitch measurement signal (Pcy), means to measure the collective pitch applied to the lifting rotor (Ros) blades, said means delivering a collective pitch measurement signal, means to measure the pitch (Pac) of the anti-torque rotor (Rac), said means delivering a measurement signal of the pitch (Pac) of the anti-torque rotor (Rac), accelerometer means for measuring the acceleration of the helicopter, generating a helicopter acceleration signal and delivering said helicopter acceleration signal corresponding to a first signal (Vx) that represents the helicopter\s longitudinal acceleration and a second signal (Vy) that represents the helicopter\s lateral acceleration relative to the ground, means to measure the helicopter\s direction angle (q
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이 특허에 인용된 특허 (9)
Graupp Frederick G. (Bellevue WA) van Leynseele Francis J. (Edmonds WA), Apparatus for determining the groundspeed rate of an aircraft.
Mandle Jacques (Granges les Valence FRX) Goudon Jean-Claude (Chabeuil FRX), Method for determining the air speed of a helicopter, system for carrying on this method and method for calibrating such.
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