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Performance Analysis of a Flat-Earth Explicit Guidance Algorithm Applicable for Upper Stages of Space Launch Vehicles  

Song, Eun-Jung (한국항공우주연구원 체계설계팀)
Cho, Sang-Bum (한국항공우주연구원 체계설계팀)
Park, Chang-Su (한국항공우주연구원 체계설계팀)
Roh, Woong-Rae (한국항공우주연구원 체계설계팀)
Publication Information
Aerospace Engineering and Technology / v.11, no.1, 2012 , pp. 169-177 More about this Journal
Abstract
This paper considers the explicit guidance algorithm to determine the closed-loop guidance law applicable to upper stages of a given space launch vehicle. It has the advantage of very simple forms derived from the flat earth assumption, which is appropriate for its on-board application. However the simple time-to-go prediction equation produces the degraded guidance performance of the launcher because of its inaccuracy. To overcome the problem, the elaborate prediction equations, which have been employed in Saturn and H-II, are attempted here. Finally, the simulation results show that the simple guidance approach requires the more accurate time-to-go prediction and gravity integrals for its broad application.
Keywords
launch vehicle; explicit algorithm; flat-earth; linear sine guidance law;
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Times Cited By KSCI : 1  (Citation Analysis)
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