One Error Demarcated Method and Experiment of Strap-down Navigation Attitude

The operation of magnetic course sensor which works as one airborne equipment is tightly related with the effect of carrier environment, because there is larger error in the measured magnetic course angle. The magnetic course sensor can not be used directly in navigation and position. Therefore, this sensor must be compensated to improve the measured accuracy of magnetic course angle when it is used in navigation. The magnetic resistance box and needle is one import magnetic course sensor, of which the magnetic deviation is main error. In the basis of magnetic deviation equation is introduced, the error demarcated method based on LS is mainly deduced by the way of seven parameters and eight positions. The experiment result of this compensated algorithm based on the proposed method proves that the error of magnetic course maintains within 0.5 degrees, thus this proposed method can meet the need of accuracy.