Výsledky vyhledávání - "Woong-Rae Roh"

Analysis of targeting method for closed-loop guidance of a multi-stage space launch vehicle

Autor: Woong-Rae Roh, Sangbum Cho, Eun-Jung Song

Publikováno v: Advances in Space Research. 57:1494-1507

This study considers the orbit insertion targeting problem for guidance of a multi-stage space launch vehicle. To design guidance algorithm for a particular mission target, the orbit designation method should be determined first, as the target orbit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::91317641772cf698313cd196d1893c2b
https://doi.org/10.1016/j.asr.2016.01.007

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Stage Separation Analysis of Launch Vehicle Using Monte Carlo Simulation

Autor: Byung-Chan Sun, Woong-Rae Roh, Choong-Seok Oh, Yong-Kyu Park

Publikováno v: Journal of the Korean Society for Aeronautical & Space Sciences. 43:341-348

This paper addresses Monte-Carlo simulation analyses for the stage separation of the general launch vehicle. The stage separation event of the launch vehicle occurs during a very short time and is related with many dynamic parameters. The stage separ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e224d298b97a984fec1bac2dc36ca8a6
https://doi.org/10.5139/jksas.2015.43.4.341

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Optimal Selection of Fuel Bias and Propellant Residual Analysis of a Liquid Rocket

Autor: Eun-Jung Song, Sangbum Cho, Woong-Rae Roh

Publikováno v: Journal of the Korean Society for Aeronautical & Space Sciences. 43:88-95

This paper considers the effects of propellant mixture ratio and loading errors on the performance of a liquid rocket. Propellant residuals generated by error sources are analyzed for a launch vehicle model whose first stage consists of a cluster roc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ae4abe5a88122b870e35a7bbacb64dd3
https://doi.org/10.5139/jksas.2015.43.1.88

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A comparison of iterative explicit guidance algorithms for space launch vehicles

Autor: Sangbum Cho, Eun-Jung Song, Woong-Rae Roh

Publikováno v: Advances in Space Research. 55:463-476

This paper analyzes and compares the performance of two prominent explicit guidance algorithms: the iterative guidance mode and the powered explicit guidance. We performed a series of numerical simulations of a space launch vehicle model for both nom

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::15add14232923ae6b215715d804f6c98
https://doi.org/10.1016/j.asr.2014.09.025

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Analytic Time Derivatives of Instantaneous Impact Point

Autor: Jaemyung Ahn, Woong-Rae Roh

Publikováno v: Journal of Guidance, Control, and Dynamics. 37:383-390

This paper presents analytic expressions for the time derivatives of a Keplerian instantaneous impact point of a rocket. The derivatives can be obtained by differentiating the series of equations associated with the Keplerian instantaneous impact poi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::803bfd467b6c568ba5bca5dff6e1c14e
https://doi.org/10.2514/1.61681

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Performance Analysis of a Precise Explicit Guidance Algorithm for Space Launch Vehicles

Autor: Woong-Rae Roh, Chang-Su Park, Sangbum Cho, Eun-Jung Song

Publikováno v: Journal of the Korean Society for Aeronautical & Space Sciences. 40:853-861

This paper considers one of the explicit guidance algorithms, which has been proposed by Jaggers, to determine the closed-loop guidance algorithm for upper stages of a 3-staged space launch vehicle. Its commanded thrust vector is closer to the optima

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8359d88e09df11d96d389e3daa777a3c
https://doi.org/10.5139/jksas.2012.40.10.853

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Noniterative Instantaneous Impact Point Prediction Algorithm for Launch Operations

Autor: Woong-Rae Roh, Jaemyung Ahn

Publikováno v: Journal of Guidance, Control, and Dynamics. 35:645-648

T HE instantaneous impact point (IIP) in launch operations is defined as the touchdown point of a rocket with an assumption of an immediate end of the propelled flight [1–3]. The IIP is very important information to judge whether the flight is norm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c1e652bfe639ad2f2e002c5eb941f734
https://doi.org/10.2514/1.56395

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