Research on Transfer Alignment Method in Launch Inertial Coordinate System

Jie Li, Cong Wang, Shuai Chen

Launch inertial coordinate system, Transfer alignment, time delay, Lever arm effect

Due to its own characteristics, a certain type of cruise missile launched under an airborne platform chose to launch the inertial coordinate system as the navigation coordinate system. In order to eliminate the problem of redundant coordinate system conversion caused by the transfer alignment model under the traditional geographic coordinate system, In this paper, the inertial navigation error propagation equation is studied. According to the equation, the transfer alignment model in the launch inertial coordinate system is established. In the existing measurement matching algorithm, the “speed + measurement misalignment angle” matching algorithm is applied to the Model. This paper proposes a compensation method suitable for the model in terms of time delay and lever arm effect in transfer alignment, and uses digital simulation to verify the system model and compensation method.