Solar reference flight roll position sensor

Details Solar reference flight roll position sensor Solar reference flight roll position sensor

1989-08-11

1990-02-06

Tarcza, Thomas H.

Measuring and testing

Navigation

Take-off and landing monitors

356141, 356152, 250237R, G01C 2100, G01C 100

Patent

active

H00007463

ABSTRACT:
A solar reference flight roll position sensor is mounted on a flight vehi having a longitudinal flight axis. The sensor, a photodetector, senses the angular position of the vehicle with respect to the sun about the flight axis. The sensor includes a lateral effect photodiode for generating first and second photocurrents in response to the position of a beam of sunlight illuminating the active surface of the photodetector. An opaque screen having an aperture is superimposed above the surface of the photodetector such that a different section of the surface is illuminated by sunlight passing through the aperture for different roll angles of the vehicle. The photocurrents are processed to form a discriminant that is a function of roll position. Roll rate is determined by measuring the rate of change of the roll position.

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