Zero-point correction device for a gravity-type accelerometer
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United States of America Patent
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Apr 26, 1994
Grant Date -
N/A
app pub date -
Dec 23, 1991
filing date -
Dec 26, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A zero-point correction device for a gravity-type accelerometer employed in a vehicle having wheels, includes a calculator for calculating an estimated vehicle acceleration Aw based on the wheel speed, and a detector for detecting a gravitationally detected acceleration Am based on said gravity-type accelerometer. A subtractor is provided for subtracting a correction amount Ao obtained in each operation cycle from the gravitationally detected acceleration Am to produce a corrected acceleration Ac which is a corrected version of said gravitationally detected acceleration Am. The correction amount Ao for the present operation cycle is obtained by adding to the correction amount Ao obtained in the previous cycle, a value commensurate with a difference between the estimated vehicle acceleration Aw and the corrected acceleration Ac.
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