The invention discloses a small celestial body soft landing differential game control method in an uncertain environment, and belongs to the technical field of deep space exploration. The implementation method comprises the following steps of under a condition that a target small celestial body accurate gravitational field model is unknown, determining a lander motion form in an irregular weak gravitational field, using a state error propagation method to design a virtual moving target landing point, and converting an uncertainty influence of the irregular gravitational field on lander motioninto random motion of the virtual moving target landing point; and designing an optimal landing control strategy of the lander based on zero and random differential games, and making the lander land according to the optimal landing control strategy so as to improve the landing precision of the lander at a predetermined position on the surface of the small celestial body.
本发明公开的不确定环境中下的小天体软着陆微分博弈控制方法,属于深空探测技术领域。本发明实现方法为:在目标小天体精确引力场模型未知的条件下,确定不规则弱引力场中的着陆器运动形式,采用状态误差传播方法设计虚拟移动目标着陆点,将不规则引力场对着陆器运动的不确定性影响转化为虚拟移动目标着陆点的随机运动;基于零和随机微分博弈设计着陆器的最优着陆控制策略,并根据所述控制最优着陆控制策略控制着陆器着陆,提高着陆器在小天体表面预定位置的着陆精度。
Small celestial body soft landing differential game control method in uncertain environment
不确定环境中下的小天体软着陆微分博弈控制方法
2020-10-30
Patent
Electronic Resource
Chinese
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