Optimal terminal guidance for exoatmospheric interception

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• 作者：Wenbin YuAuthor Vitae ; Wanchun ChenAuthor Vitae ; Liang Yang ; ^{yangliang.buaa@hotmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Xiaoming LiuAuthor Vitae ; Hao ZhouAuthor Vitae
• 关键词：Exoatmospheric interception ; Explicit guidance ; Guidance ; Optimal control ; Proportional navigation ; Pulsed guidance
• 刊名：Chinese Journal of Aeronautics
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：29
• 期：4
• 页码：1052-1064
• 全文大小：731 K

文摘

In this study, two optimal terminal guidance (OTG) laws, one of which takes into account the final velocity vector constraint, are developed for exoatmospheric interception using optimal control theory. In exoatmospheric interception, because the proposed guidance laws give full consideration to the effect of gravity, they consume much less fuel than the traditional guidance laws while requiring a light computational load. In the development of the guidance laws, a unified optimal guidance problem is put forward, where the final velocity vector constraint can be considered or neglected by properly adjusting a parameter in the cost function. To make this problem analytically solvable, a linear model is used to approximate the gravity difference, the difference of the gravitational accelerations of the target and interceptor. Additionally, an example is provided to show that some achievements of this study can be used to significantly improve the fuel efficiency of the pulsed guidance employed by the interceptor whose divert thrust level is fixed.