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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 3498350, 7 pages
https://doi.org/10.1155/2017/3498350
Research Article

Optimal Skip Entry Trajectory for Lunar Return Vehicle with Trim-Flaps

1College of Electric and Information Engineering, Taiyuan University of Science and Technology, Taiyuan 312400, China
2College of Electric and Information Engineering, Jiangsu University of Technology, Changzhou 213001, China

Correspondence should be addressed to Yin Wang; moc.361@714wpx

Received 1 December 2016; Accepted 16 January 2017; Published 6 February 2017

Academic Editor: Stefan Balint

Copyright © 2017 Yin Wang and Keming Yao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A medium lift-to-drag ratio lunar return vehicle with trim-flaps is presented in this paper. The trajectory optimization design under heat-rate constrain for skip entry lunar return vehicle is analyzed. The optimization problem with a first-order state constraint is introduced. The trajectory applying the Pontryagin maximum principle under the performance of minimum heat is optimized, and the optimal expression of lift coefficient is derived. The simulation studies show that this research method can decrease the heat-rate effectively.