基于比例导引的深空撞击脉冲导引律设计

撞击探测是深空探测的一种重要探测手段.高精度的导引方法是实现撞击任务的关键.本文针对深空撞击任务的特点,推导了相对动力学方程,并据此设计了脉冲比例导引律.以某撞击任务为背景对比例导引方法进行了蒙特卡洛仿真验证.结果表明：该方法与传统预测制导方法相比撞击精度略低,但仍可满足任务需求,速度增量消耗基本相当,同时可满足不同轨道下任务的需求,避免了自主导航定位精度对预测制导的限制,具有较强的工程实用价值.

Pulse guidance law for deep space impact based on the proportional guidance

Impact exploration is an important mode of deep space exploration. The high precision guidance law is the key to realize the impact mission. Based on the characteristics of deep space impact mission, the relative dynamic equations are derived and the pulse proportional guidance law is designed. In this paper, Monte Carlo simulation is carried out for the proportional guidance about the impact mission. Results show that the method comparing with the traditional predictive guidance method gets a slightly lower impact precision, but still can meet the demand of the mission. The velocity increment consumption of the method is basically the same with predictive guidance. On the other hand, the method can meet the requirements of the mission in different orbits, avoiding the limitation of autonomous navigation positioning accuracy to predict of guidance. This method can be applied in practice well.