Method and system for automatic control of vehicles based on carrier phase differential GPS
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United States of America Patent
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Apr 18, 2000
Grant Date -
N/A
app pub date -
Jun 20, 1997
filing date -
Jun 20, 1997
priority date (Note) -
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Abstract
Described is an automatic control system for land (and possible marine) vehicles based on carrier phase differential GPS (CPGPS). The system relies on CPGPS to determine vehicle position and attitude very precisely (position to within 1 cm and attitude to within 0.1.degree.). A system incorporates a technique to calculate and compensate for antenna motion due to vehicle roll and pitch. One aspect of the system utilizes an intelligent vehicle controller that recognizes and adapts to changing conditions, such as vehicle speed, implements towed by the vehicle, soil conditions, and disturbance level. The system provides the capability to control the vehicle on various paths, including straight lines and arbitrary curves. Also described is a technique for initialization and vehicle control using only a single pseudolite.
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