制导火箭弹起控时间对规划弹道的影响

Influence of Launching and Controlling Time of Guidance Rockets on Planning Trajectory

摘要:

以制导火箭弹飞行过程中能量损失最小为代价函数,利用高斯伪谱法构建最优控制模型,在弹箭中制导阶段寻找最优性能指标下的规划弹道,分析弹道规划起始时间对火箭弹末速的影响,得到各弹道诸元随不同起始规划时刻变化的曲线图。仿真结果表明:弹道规划起控时间对中制导阶段弹箭末速影响比较明显,最大可使其减少11%左右,与靶场初步试验结果相吻合。

Abstract:

Taking the minimum energy loss as the cost function in the course of guidance rockets flight, the optimal control model was constructed by using the Gauss pseudo-spectral method, and the optimal trajectory was found in the midcourse guidance stage. The influence of the initial trajectory planning time on the final velocity of the rocket was analyzed, and the curves of the trajectory elements varying with the different initial planning time were obtained. The simulation results show that the trajectory planning start-up and control time has an obvious effect on the terminal velocity of the guidance rockets in the midcourse guidance stage, and the maximum reduction is about 11%, which is in agreement with the preliminary test results in the shooting range.