Mars Entry Guidance Based on Predictor-Corrector Algorithm

ZHOU Liuyu; XIAYuanqing; CHEN Rongfang; CUI Pingyuan

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Mars Entry Guidance Based on Predictor-Corrector Algorithm

ZHOU Liuyu 1,XIAYuanqing 1 *,CHEN Rongfang 1,CUI Pingyuan 2

1.School of Automation, Beijing Institute of Technology, Beijing 100081, China

2.School of Aeronautics, Beijing Institute of Technology, Beijing 100081, China

*Correspondence author

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Funding: NationalNaturalScienceFoundationofChina（No.61225015,60974011）, Ph.D.ProgramsFoundationofMinistryofEducationofChina（No.20091101110023,20111101110012）, National Basic Research Programof China (973 Program) （No.2012CB720000）

Opened online:18 October 2013

Accepted by: none

Citation: ZHOU Liuyu,XIAYuanqing,CHEN Rongfang.Mars Entry Guidance Based on Predictor-Corrector Algorithm[OL]. [18 October 2013] http://en.paper.edu.cn/en_releasepaper/content/4563676

This paper addresses the development and evaluation of the numerical predictor-corrector algorithm for the Mars entry guidance.The requirement of future Mars missions is to enable pinpoint and high elevation Mars landing.There are two main entry guidance algorithms: guidance using a reference trajectory and guidance using predictor-corrector.Guidance algorithm that tracks the reference trajectory during entry, has some degree of model-independence and does not require fast on-board computation, but it is sensitive to initial conditions.However, the predictor-corrector algorithm can be less sensitive to initial dispersions, but needs fast on-board computation.Detailed descriptions of predictor-corrector algorithm, lateral control logic and heading alignment are given and an improved predictor-corrector algorithm is provided to shorten the on-board computational time. Simulation results show that this entry guidance algorithm demonstrates reliable and robust performance in situations with high uncertainties.

Keywords:entry guidance, predictor-corrector, on-board computation, lateral control, heading alignment.

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