A new transfer alignment of airborne weapons based on relative navigation

The traditional transfer alignment for airborne weapons are inadequate to fulfill practical requirement, because of the complicated and unknown wing flexure deformation. To solve this problem, a new transfer alignment method based on relative navigation is proposed. The alignment process is achieved by computing the real-time relative motion between the different inertial units. Besides, the kalman filter is performed to estimate and correct the alignment errors. By this way, it can not only skip the complex model of flexure angle, but also improve the alignment performance. Theoretical analyses and simulation results show that the proposed method can accomplish the transfer alignment in the wing flexure situations, and the relative attitude accuracy can reach the arc second level after about 100 s. Compared with the traditional transfer alignment, the new method is practical and has high-precision.