A system known as Global Positioning System (GPS) Integrated Navigation (INAV), under development and test at Texas Instruments, has now progressed from laboratory test to a flight-test phase on a company-owned aircraft. This paper describes the results of these flight tests, including accuracy evaluation of the INAV system, and the performance of the system under nap-of-the-earth tests. The tightly coupled INAV approach supports the traditional alignment of an inertial set with GPS and, in addition, provides a real-time calibration of the basic inertial sensor errors, compensating for day-to-day drift of the instruments. Effective sensor drift rates are improved by a factor of 3. The GPS tracking loops incorporate carrier loop-aiding from the inertial process, allowing the receiver to operate through high-dynamic maneuvers and extensive periods of signal outage arising from antenna shading or jamming. The performance of this single-channel multiplex GPS receiver against dynamics or jamming exceeds that achieved with many multichannel sets to date. Although the system is configured for use with low-cost inertial systems, it is readily adapted to higher quality instruments.
Flight test results of an integrated GPS and strapdown inertial system
Flugtestergebnisse eines integrierten GPS und Strapdown Traegheits-Systems
1986
7 Seiten, 15 Bilder, 2 Tabellen, 3 Quellen
Conference paper
English
Low Cost Strapdown Inertial/GPS Integrated Navigation for Flight Test Requirements
British Library Conference Proceedings | 1999
|Low Cost Strapdown Inertial-DGPS Integration for Flight Test Requirements
Online Contents | 1999
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