深空探测转移轨道自主中途修正方法研究

针对深空转移轨道,提出以B平面参数为终端参数,采用脉冲控制和线性制导的自主中途修正方法.由自主导航系统定期确定探测器的当前位置和速度,之后利用精确动力学积分递推状态至B平面,得到打靶误差,若误差超出目标精度范围又在自主修正系统修正能力范围内,则立即利用以B平面参数为终端参数的线性制导公式并结合牛顿迭代计算出修正轨道的速度增量.利用中心差分公式计算终端参数对控制参数的敏感矩阵.蒙特卡罗仿真表明,在小偏差前提下该方法能够达到制导目标.

Study on the Autonomous Midcourse Correction during Cruise Phase of Interplanetary Exploration

Autonomous midcourse correction is a key technique to facilitate autonomy of an interplanetary spacecraft.Using B-plane parameters as target parameters and impulse control method combined with linear guidance,an autonomous orbit correction method used during cruise phase of interplanetary orbit is proposed.First,the navigation system periodically determines positions and velocities of the spacecraft.The states are then mapped onto the B-plane by integrating the dynamics model accurately.If deviation from th...