System, method, device and computer code product for...

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2005-11-15

2005-11-15

Fulton, Christopher W. (Department: 2859)

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

C033S35500D

Reexamination Certificate

active

06964107

ABSTRACT:
A system, method, device and computer code product is disclosed for stabilizing compass heading under tilt error conditions from an uncorrected electronic compass reading. Exemplary embodiments include a stabilizing filter configured to filter out tilt errors incorporated into the uncorrected electronic compass reading and a filter adaptation module configured to control the stabilizing filter response based on the signal radius of the uncorrected compass reading and a pre-calibrated ideal radius for the compass. The filter adaptation module can be configured to calculate a filter response parameter as a function of the relative difference between the signal radius of the uncorrected compass reading and the pre-calibrated ideal radius. The filter response parameter can be passed to the stabilizing filter for controlling its operation.

REFERENCES:
patent: 2331617 (1943-10-01), Moore
patent: 4292854 (1981-10-01), Liebing
patent: 5170566 (1992-12-01), Fowler et al.
patent: 5953683 (1999-09-01), Hansen et al.
patent: 6282803 (2001-09-01), Dunne
patent: 6651003 (2003-11-01), Woloszyk et al.
patent: 6871410 (2005-03-01), Le Jeune
patent: 2005/0044737 (2005-03-01), Choi et al.

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