Process and device for monitoring the validity of a speed...

Details Process and device for monitoring the validity of a speed... Process and device for monitoring the validity of a speed...

2004-07-16

2009-11-10

Tran, Khoi (Department: 3664)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Aeronautical vehicle

C073S170020, C073S861650

Reexamination Certificate

active

07617023

ABSTRACT:
A process for monitoring the validity of a speed cue of an aircraft may include computing a coefficient of lift, which is representative of the lift of the aircraft, on the basis of values of static and total pressure. A first value of angle of incidence is computed on the basis of the computed coefficient of lift, and a second value of angle of incidence is determined. The difference between the first and second values of angle of incidence is computed, and the absolute value of the difference is compared with a predetermined threshold value. Based on the comparison, the speed cue is deemed valid if the absolute value of the difference is below the threshold value and deemed invalid otherwise.

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http://web.archive.org/web/20020611181446/http://www.grc.nasa.gov/WWW/K-12/airplane/isentrop.html.
http://web.archive.org/web/20030207205202/http://www.grc.nasa.gov/WWW/K-12/airplane/liftco.html.
Preliminary Search Report dated Jan. 21, 2004.

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