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논문 기본 정보

자료유형
학술대회자료
저자정보
Ki-Wook Jung (Korea Advanced Institute of Science and Technology) Chang-Hun Lee (Korea Advanced Institute of Science and Technology) Junseong Lee (Korea Aerospace Research Institute) Sunghyuck Im (Korea Aerospace Research Institute) Keejoo Lee (Korea Aerospace Research Institute) Marco Sagliano (DLR Institute of Space Systems) David Seelbinder (DLR Institute of Space Systems)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2021
발행연도
2021.10
수록면
1,489 - 1,495 (7page)

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초록· 키워드

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This paper aims to propose a new guidance algorithm for a rocket with aerodynamics control for launch operations, based on the concept of the instantaneous impact point (IIP). In this study, the rocket with aerodynamics control is considered with the purpose of reducing dispersion of the impact point after separation of the rocket for safety reasons. Since a very limited aerodynamic maneuverability is typically allowed for the rocket due to the structural limit, a guidance algorithm producing a huge acceleration demand is not desirable. Based on this aspect, the proposed guidance algorithm is derived directly from the underlying principle of the guidance process: forming the collision geometry towards a target point. To be more specific, the collision-ballistic-trajectory where the instantaneous impact point becomes the target point, and the corresponding heading error are first determined using a rapid ballistic trajectory prediction technique. Here, the trajectory prediction method is based on the partial closed-form solutions of the ballistic trajectory equations considering aerodynamic drag and gravity. And then, the proposed guidance algorithm works to nullify the heading error in a finite time, governed by the optimal error dynamics. The key feature of the proposed guidance algorithm lies in its simple implementation and exact collision geometry nature. Hence, the proposed method allows achieving the collision course with minimal guidance command, and it is a desirable property for the guidance algorithm of the rocket with the aerodynamics control. Finally, numerical simulations are conducted to demonstrate the effectiveness of the proposed guidance algorithms.

목차

Abstract
1. INTRODUCTION
2. PROBLEM DEFINITION
3. PROPOSED GUIDANCE ALGORITHM
4. SIMULATION STUDY
5. CONCLUSION
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