Missile echelon correction guidance method and system under satellite-missile cooperation condition

The invention discloses a missile echelon correction guidance method and system under a satellite-missile cooperation condition, and the method comprises the steps: firstly carrying out the judgment according to the motion information of a missile body and a target obtained from a space base, and then carrying out the control sequence updating through an online re-planning or MPSP algorithm module and a neighborhood optimal control algorithm; and finally, a proper threshold value is selected according to the terminal change of the target to weight the control sequences of the two methods to obtain an instruction sequence obtained after trajectory correction, simulation verification shows that the scheme can obviously improve the trajectory speed, and a good guidance effect is achieved. 本发明公开了一种星弹协同条件下导弹梯次化修正制导方法和系统，首先根据从天基获取的弹体以及目标的运动信息进行判断，然后分别利用在线重规划或MPSP算法模块以及邻域最优控制算法进行控制序列更新，最后根据目标的终端变化选择合适阈值对两种方法的控制序列进行加权得到弹道修正后所得的指令序列，根据仿真验证表明该方案能明显提高弹道速度，具有良好的制导效果。