Guidance Law of Impacting Small Bodies Using Zero-Effort-Miss(ZEM) Steering

摘要：

Impacting target body directly is a new method to explore the small bodies such as the comets and the asteroids, and which was carried out by NASA’S Deep Impact mission. In this paper, an autonomous endgame guidance law of impacting asteroids is discussed. Due to the pulsed thrust of spacecraft actuator, a pulsed guidance law is established based on the zero-effort-miss steering. Then, in order to execute the guidance law autonomously, the navigation error is described in the B-plane by navigation error ellipse. So, the time of executing trajectory correction maneuver (TCM) is determined by comparing the ZEM with navigation error. It will be shown that this technique has the advantage of better precision and can execute the guidance law autonomously which can reduce the fuel consumption. A typical numerical example is given here. And with the comparison to the guidance law applied in Deep Impact mission, results show that this endgame guidance law can obtain better precision with less fuel consumption.

作者: Shengying Zhu Pingyuan Cui Weiwen Zhou

作者单位: Deep Space Exploration Research Center,Harbin Institute of Technology Harbin,Heilongjiang Province,150080 China

会议类型: 国际会议

会议名称: The 2nd International Symposium on Systems and Control in Aeronautics and Astronautics(第二届航空航天系统与控制国际会议 ISSCAA 2008)

会议地点: 深圳

会议语种:英文

页码: 1161-1165

在线出版日期: 2008-12-10（万方平台首次上网日期，不代表论文的发表时间）