Inertial navigation accuracy enhancement

Details Inertial navigation accuracy enhancement Inertial navigation accuracy enhancement

2005-06-28

2005-06-28

Issing, Gregory C. (Department: 3642)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

Reexamination Certificate

active

06912464

ABSTRACT:
Apparatus for the improvement of inertial navigation system (INS) position/velocity comprises frame stores for storing sequential images from a video camera and a comparator for comparing pixels in predicted images, derived from earlier stored images as modified by INS linear and angular velocity outputs, with pixels in actual later stored images, to derive a velocity error correction signal which is used to correct the INS output. The video processing correction system described is passive and hence does not reveal the aircraft's whereabouts as would be the case with other positional correction systems using radar, nor does it rely on systems outside the control of the INS, e.g., GPS, nor is it reliant on a vast terrain feature database.

REFERENCES:
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patent: 0 436 213 (1991-07-01), None
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patent: 2 289 389 (1995-11-01), None
Sim, D.-G. et al. “Navigation Parameter Estimation from Sequential Aerial Images”, International Conference on Image Processing, 1996. Proceedings. Sep. 1996, pp. 629-632.

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