Method for compensating Misalignment and Scale Factor Errors of 3-Axis Gyro using Single Difference

摘要

The present invention relates to a method for compensating a misalignment and a scale factor error of a 3-axis angular velocity sensor using a single difference, and more specifically, to a method for compensating a misalignment and a scale factor error of a 3-axis angular velocity sensor using a single difference (S20) of a gyro drift error estimation value determined by a satellite onboard computer and a single difference (S10) of an angular velocity measurement value of a gyro mounted on a satellite. The method for compensating a misalignment and a scale factor error of a 3-axis angular velocity sensor using a single difference comprises: a data acquisition processing step (S100) of transferring the single difference result (S10) value for the angular velocity measurement value of the gyro mounded on the satellite and a single difference result (S20) value of the gyro drift error estimation value; a data storing step (S200) of receiving the single difference result (S10) value for the angular velocity measurement value of the gyro mounted on the satellite and the single differenced result (S20) value of the gyro drift error estimation value from the data acquisition processing step (S100) and storing data in the form of a T matrix and a gyro drift error single difference vector; a misalignment and scale factor error calculating step (S300) of calculating a pseudo inverse function by using information on at least three earth-oriented positions of the satellite, which are acquired by the data storing step (S200) and calculating the misalignment and the scale factor error value of the angular velocity sensor; and an error compensating step (S400) of compensating the misalignment and the sale factor of the angular velocity sensor by using the misalignment and the scale factor error value of the angular velocity sensor, which are calculated by the misalignment and scale factor error calculating step (S300).