Angles only navigation system
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United States of America Patent
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Dec 22, 2015
Grant Date -
N/A
app pub date -
Nov 3, 2014
filing date -
Jan 8, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An angles only navigation system. The system includes an IMU coupled with a passive optical sensor. The optical sensor provides periodic updates to the IMU in order to correct for accelerometer and gyro drifts. The IMU computes the air vehicle's instantaneous position, velocity, and attitude using gyro and accelerometer measurements. The optical sensor images stars and satellites. The navigation filter combines optical sensor measurements with IMU inputs, and determines those corrections needed to compensate for the IMU drifts. By applying periodic corrections to the IMU using satellite angular measurements, the navigation filter maintains an accurate position estimate during an entire flight.
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Family
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