发明名称 |
Apparatus and method for determining airspeed and direction. |
摘要 |
<p>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.</p> |
申请公布号 |
EP0319447(A2) |
申请公布日期 |
1989.06.07 |
申请号 |
EP19880630207 |
申请日期 |
1988.11.17 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
FLINT, WILLIAM WALLACE, III;FILIPKOWSKI, RICHARD C. |
分类号 |
G01P13/02;G01C23/00;G01P5/00;G01P5/14 |
主分类号 |
G01P13/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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