A comparison of iterative explicit guidance algorithms for space launch vehicles. Issue 1 (1st January 2015)

• Record Type: Journal Article
• Authors: Song, Eun-Jung; Cho, Sangbum; Roh, Woong-Rae
• Is Part Of: Advances in space research. Volume 55:Issue 1(2015)
• Page Start: 463
• Page End: 476
• Publication Date: 2015-01-01
• Subjects: Space sciences -- Periodicals; Astronautics -- Periodicals; Geophysics -- Periodicals; 500.505
• DOI: 10.1016/j.asr.2014.09.025
• Languages: English
• ISSNs: 0273-1177

Abstract

<abstract xml:lang="en" abstract-type="author" id="ab005"> <title id="st045">Abstract</title> <sec> <p id="sp0005">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 nominal and off-nominal conditions. One of our findings is that if we take into account the originally ignored higher-order terms from the guidance parameters of the iterative guidance mode for a long-range flight, the guidance performance can be enhanced to a level comparable to that of the powered explicit guidance. These higher-order terms can be included by employing an iterative predictor–corrector method like the powered explicit guidance. Also we proposed a remedy of preventing relatively earlier divergence of the guidance commands with the predictor–corrector iteration than that of the linear differential corrector approach by making a better initial guess.</p> </sec> </abstract>