Abstract:

In order to solve the problem that the performance of transfer alignment accuracy evaluation is retrained by the ship’s limited maneuver ability, a method of accuracy evaluation for shipborne weapon inertial navigation system is put forward. The azimuth information applied by celestial navigation system and decelerated maneuver manner are introduced. Observability analysis of system is implemented so that the relationship between accelerated motion, rotation observation variable and the performance of evaluation approach are proposed. And a simulation is carried out by using fixed point smoothing algorithm. The result shows that the proposed method has an excellent performance for misalignment angles, and the errors of smoothed estimations are less than 10 percents. Moreover, the decelerated maneuver can improve the smoothed accuracy of azimuth misalignment angle.