SYSTEM AND METHOD FOR DETERMINING AND CORRECTING FIELD SENSORS ERRORS

摘要

A system and method for determining errors and calibrating to correct errors associated with field sensors, including bias, scale, and orthogonality, includes receiving and providing to a processor angular rate data and a first field vector relative to a first reference directional field and a second field vector relative to a second reference field from at least one field sensor. The processor is configured to relate the first field vector and the second field vector to the angular rate data to determine an error of the at least one field sensor. The processor is also configured to identify a compensation for the error of the at lease one field sensor needed to correct the first field vector and the second field vector and repeat the preceding to identify changes in the error over time and compensate for the changes in the error over time.

主权项

1. A system for determining an error of a field sensor, the system comprising:
an input configured to receive angular rate data from a gyroscope and at least one of a first field vector relative to a first reference directional field and a second field vector relative to a second reference field from at least one field sensor; a non-transitive computer-readable storage medium having stored thereon instructions; a processor configured to receive the angular rate data and the at least one of the first field vector and the second field vector and access the storage medium to execute the instructions to carry out steps of:
i) relating the at least one of the first field vector and the second field vector to the angular rate data to determine an error of the at least one field sensor providing the at least one of the first field vector and the second field vector;ii) identifying a compensation for the error of the at least one field sensor needed to correct the at least one of the first field vector and the second field vector; andiii) repeating steps i) and ii) to identify changes in the error over time and compensate for the changes in the error over time.