Carrier differtial GPS for takeoff to landing of an unmanned flight vehicle
Conference
·
OSTI ID:379533
- Stanford Univ., CA (United States)
Using the carrier of the GPS signal, one is able to resolve relative displacements in space to the centimeter level. This paper describes the use of carrier differential techniques to determine the position, velocity, attitude and angular velocity of an autonomous aircraft in real time. The full state GPS estimates are used in linear quadratic (LQ) feedback control to automate the flight of the aircraft from takeoff thru landing. We present flight data from recent flight tests. In addition to GPS, the aircraft is instrumented with a variety of inexpensive conventional sensors including alpha and beta vanes, and a dynamic pressure sensor (pitot). These provide an independent measurement of the aircraft velocity relative to the air. This independent measurement of the aircraft velocity relative to the air. This independent measurements enables estimation of the the absolute wind vector, which is used in waypoint tracking. 9 refs., 7 figs.
- OSTI ID:
- 379533
- Report Number(s):
- CONF-960613--
- Country of Publication:
- United States
- Language:
- English
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