Altimeter with calibration

摘要

An altitude dead reckoning system using measurements of forward speed, a yaw angle rate and external altitude information in order to estimate an error in the acceleration due to an accelerometer bias; and an output converter configured to use the forward speed, yaw angel rate, acceleration and estimated accelerometer bias to calculate a change in altitude.

主权项

1. A dead reckoning altimeter, comprising:
a computer system comprising:
a processor;an estimator stored on a memory coupled with said processor configured to receive an input representing a forward speed, a yaw angle rate, a forward acceleration and external altitude information, said estimator configured to continuously estimate a continuous error in said acceleration due to an accelerometer bias without requiring an initial estimate of said accelerometer bias; andan output converter stored on said memory coupled with said processor and with said estimator configured to use said forward speed, said yaw angle rate, said forward acceleration and said continuous estimated accelerometer bias to calculate using a hidden operation, a real-time change in altitude.