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http://dx.doi.org/10.5139/IJASS.2011.12.3.288

Two-Dimensional Trajectory Optimization for Soft Lunar Landing Considering a Landing Site  

Park, Bong-Gyun (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
Ahn, Jong-Sun (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
Tahk, Min-Jea (Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology)
Publication Information
International Journal of Aeronautical and Space Sciences / v.12, no.3, 2011 , pp. 288-295 More about this Journal
Abstract
This paper addresses minimum-fuel, two-dimensional trajectory optimization for a soft lunar landing from a parking orbit to a desired landing site. The landing site is usually not considered when performing trajectory optimization so that the landing problem can be handled. However, for precise trajectories for landing at a desired site to be designed, the landing site has to be considered as the terminal constraint. To convert the trajectory optimization problem into a parameter optimization problem, a pseudospectral method was used, and C code for feasible sequential quadratic programming was used as a numerical solver. To check the reliability of the results obtained, a feasibility check was performed.
Keywords
Trajectory optimization; Pseudospectral method; Soft landing;
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