基于不完备推力加速度模板的主动段弹道估计

Trajectory Estimation in Boost Phase Based on Incomplete Thrust Acceleration Profile

针对如何通过引入有限先验信息提高弹道导弹主动段弹道估计精度的问题,提出一种基于不完备推力加速度模板的弹道估计算法。将推力方向角增广为目标状态分量,基于模板信息建立精细的参数化动力学模型;利用目标初始位置的地心矢径估算初始推力方向;使用一阶Markov过程描述推力方向角,设计过程噪声自适应算法。仿真结果表明,与传统方法相比,该算法估计误差减小约50%,并可获得推力方向角的准确估计,收敛速度和稳定性显著提高。

To improve the trajectory estimation accuracy in boost phase by introducing finite prior information,this paper proposes a trajectory estimation algorithm based on incomplete thrust acceleration profile.Firstly,the thrust direction angles are extended to the state component of the ballistic missile target.Then,a detailed parameterized dynamic model is established based on the profile information.After that,the initial thrust direction anglesare estimated by the target initial geocentric vector,and the process noise adaptive algorithm is designed by using the first-order Markov process to describe the thrust direction angles.Simulation results show that,compared with the traditional method,the estimation error of this algorithm is reduced by about 50%,the thrust direction angles can be estimated accurately,and the convergence speed and stability improve significantly.