Lunar Descent Using Sequential Engine Shutdown

Springmann, Philip N

doi:10.2514/6.2006-6678

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…However, this leads to considerable landing errors. 49 Horn showed the application of a 2D iterative law with heritage of bi-linear tangent steering. 50, 51 Lunghi et al combined a classical explicit algorithm with modern optimization techniques to impose constraints.…”

Section: Other Methodsmentioning

confidence: 99%

Guidance for Autonomous Precision Landing on Atmosphereless Bodies

Gerth

Mooij

2014

AIAA Guidance, Navigation, and Control Conference

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Two key technologies that will likely fly on next-generation planetary landers are hazard detection and avoidance (HDA) and vision-based navigation. The purpose of HDA is to make previously unsafe landing sites accessible by future vehicles, and to increase the safe landing probability overall. Vision-based navigation will enable to target specific landing sites more precisely and also plays an important role for HDA. This paper formulates requirements on the guidance system that derive from the needs of these new systems. After the introduction of a reference mission scenario with HDA and vision-based navigation inthe-loop, an extensive literature survey of the state-of-the-art in approach-phase guidancealgorithms is presented. This presents the methods under the angle of HDA-compatibility. The sheer number of papers mentioned here leads to the conclusion that trade-offs are challenging. It is recommended to do a down-selection from the papers presented here, and do a performance-based trade study for the particular test case under consideration with a few candidates. As an example, E-Guidance is presented for a Mercury-and a Moon-landing scenario. Because the results differ dramatically, it is concluded that it is essential to perform trade-offs on the actual mission scenario under study, and that trades cannot merely be based on references in the literature. Because the proposed E-Guidance method is not satisfyingly robust, it is a goal for future research to improve upon this.

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Section: Other Methodsmentioning

confidence: 99%