Powered Descent Guidance Methods For The Moon and Mars

Abstract

This study consists of a performance assessment of the various types of powered descent guidance methods previously used for missions to the Moon and Mars. The strengths and weaknesses of the various methods are discussed and simulation results are shown. Past methods have been used as a starting point for newer guidance schemes and one particular guidance scheme based on the Apollo Lunar Module Landing Guidance is discussed in greater detail. The guidance results are compared to optimal trajectory results, and a general outline for future powered descent trajectory guidance is suggested.