Altimeter with calibration
First Claim
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1. A dead reckoning altimeter, comprising:
- an estimator configured to use a forward speed, a yaw angle rate, a forward acceleration and external altitude information in order to estimate an error in said acceleration due to an accelerometer bias without a requirement for an initial estimate of said accelerometer bias; and
an output converter configured to use said forward speed, said yaw angle rate, said forward acceleration and said estimated accelerometer bias to calculate a change in altitude.
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Abstract
An altitude dead reckoning system using measurements of forward velocity, forward acceleration, and yaw angle rate to determine changes in altitude with automatic calibration of an accelerometer bias.
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Citations
20 Claims
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1. A dead reckoning altimeter, comprising:
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an estimator configured to use a forward speed, a yaw angle rate, a forward acceleration and external altitude information in order to estimate an error in said acceleration due to an accelerometer bias without a requirement for an initial estimate of said accelerometer bias; and an output converter configured to use said forward speed, said yaw angle rate, said forward acceleration and said estimated accelerometer bias to calculate a change in altitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining change in altitude, compromising:
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using a forward speed, a yaw angle rate, a forward acceleration and external altitude information for estimating an error in said acceleration due to an accelerometer bias without a requirement for an initial estimate of said accelerometer bias; and using said forward speed, said yaw angle rate, said forward acceleration and said estimated accelerometer bias for determining a change in altitude. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification