Abstract:

A vector matching based transfer alignment method is presented. The raw measurement information and quaternion recursive algorithm is employed to estimate the misalignment angle quaternion between the master and slave INS. Simulation results show that the algorithm can accurately converge to real value under special attitude maneuver, which can meet the requirement of the missile INS alignment. Besides the algorithm has good convergence even when the initial attitude errors reach 30°. It can make a good small error angle condition for the optimal filtering fine alignment algorithm when the high accuracy is needed.