Online midcourse guidance method for boost phase interception via adaptive convex programming

This paper proposes an online midcourse guidance method for boost phase interception. Dynamic models are established and flight constraints are analyzed firstly. Handover constraints between midcourse and terminal guidance are transformed as an optimization problem by introducing additional optimiza...

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Veröffentlicht in:Aerospace science and technology Jg. 118; S. 107037
Hauptverfasser: Yang, Biao, Jing, Wuxing, Gao, Changsheng
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Masson SAS 01.11.2021
Schlagworte:
Adaptive update strategy
Boost phase interception
Convex programming
Online midcourse guidance
Adaptive update strategy
Boost phase interception
Online midcourse guidance
Convex programming
ISSN:1270-9638, 1626-3219
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Zusammenfassung:This paper proposes an online midcourse guidance method for boost phase interception. Dynamic models are established and flight constraints are analyzed firstly. Handover constraints between midcourse and terminal guidance are transformed as an optimization problem by introducing additional optimization variables in this paper. Then midcourse guidance problem can be transformed as an optimization problem with constraints. It can be solved by convex programming through constraints relaxation and linearization. In order to overcome flight uncertainty and changes of target trajectory, an online guidance framework based on convex programming is presented. But it takes some calculation time to solve the convex programming problem, which causes the delay of guidance commands. Based on sensitivity analysis of nonlinear programming, a command correction method is designed to reduce the delay effect. Besides, an adaptive update strategy of trust region in convex programming is proposed to guarantee calculation accuracy and speed. And the discrete points are continuously updated with the flight time to improve calculation efficiency. Finally, numerical simulations for different cases have demonstrated the effectiveness of the online midcourse guidance method proposed.
ISSN:1270-9638
1626-3219
DOI:10.1016/j.ast.2021.107037