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Escape trajectories exploiting multiple lunar gravity assists

Maurizio Valesani

Escape trajectories exploiting multiple lunar gravity assists.

Rel. Lorenzo Casalino, Michele Lavagna. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Aerospaziale, 2018

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Taking advantage of a gravity assist manoeuvre is a common strategy to achieve generally high Delta V without resorting to the consumption of propellant - thus increasing the transportable payload mass -, as the gained energy is provided by the gravitational pull of a celestial body. In this instance, lunar gravity assists stand out as an extremely competitive alternative to direct escapes when evasion from Earth's sphere of influence is considered. This study is aimed at investigating the opportunity provided by a multiple-gravity-assist-aided escape, by examining the possible Moon-to-Moon trajectories allowing two consequent gravity assist manoeuvres and the effect on the escape orbit, with the intent to link the characteristics of said final orbit (heliocentric flight-path angle and declination) to the maximum achievable specific mechanical energy (i.e. the obtainable escape velocity). After a brief introduction, the mathematical models adopted throughout the dissertation will be presented; a description of the methodology for the analysis of Moon-to-Moon orbits and lunar gravity assists will then be introduced in a dedicated chapter, followed by a presentation of the obtained results. The final chapter consists of conclusive remarks, in addition to the difficulties faced during the work activity and a brief discussion about possible future developments of the present study.

Relators: Lorenzo Casalino, Michele Lavagna
Academic year: 2017/18
Publication type: Electronic
Number of Pages: 88
Corso di laurea: Corso di laurea magistrale in Ingegneria Aerospaziale
Classe di laurea: New organization > Master science > LM-20 - AEROSPATIAL AND ASTRONAUTIC ENGINEERING
Aziende collaboratrici: UNSPECIFIED
URI: http://webthesis.biblio.polito.it/id/eprint/7769
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