Apparatus and method for determining airspeed and direction

Details Apparatus and method for determining airspeed and direction Apparatus and method for determining airspeed and direction

1987-11-20

1990-01-09

Tarcza, Thomas H.

Boots, shoes, and leggings

73182, 73178H, 416 31, 244 1713, G01C 2100

Patent

active

048932612

ABSTRACT:
Aircraft speed and direction are determined by sampling the sinusoid-like pressure variations at the end of a rotor and performing a Fourier analysis on the pressure samples. Fourier quadrature component signals are used to determine aircraft direction and are also used to determine, along with a steady state component, the aircraft's total velocity. A discrete Fourier analysis may be performed on the pressure samples using a plurality of subrevolution pressure samples averaged over each subrevolution interval.

REFERENCES:
patent: 3332282 (1967-07-01), Daw
patent: 4360888 (1982-11-01), Onksen et al.
patent: 4519743 (1985-05-01), Ham

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