Systems and method for estimating speed and pitch sensor errors

Details Systems and method for estimating speed and pitch sensor errors Systems and method for estimating speed and pitch sensor errors

2005-06-14

2005-06-14

Chin, Gary (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S034000, C701S214000, C342S358000

Reexamination Certificate

active

06907347

ABSTRACT:
Systems and methods for estimating the bias and scale factor in a speed sensor and pitch sensor using a modified adaptive filter. A filter learns adaptively in a random manner to estimate the errors in the vehicle speed and pitch angle. The aiding measurements used in this approach are exemplarily DGPS travel distances. The filter adaptively estimates error source values during the availability of DGPS, and can then use these estimates to aid an INS during DGPS outages.

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“An Examination of the Relative Merits of Various Sensors for Vehicle Navigation”, by Eric Abbott et al., Proceedings of ION GPS-95, pt. 1, 1995, pp. 1269-1284, Stanford University.

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