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Development of a Simulation Tool for the Propulsion Subsystem of ESMO Lunar Mission

Introduction: The Moon is the main objective for next decade Space missions. Exploitation, scientific research, robotic and manned exploration are planned by the most important space agencies. This renewed interest involves both the main Space Players down to the academic level. The European Student Moon Orbiter (ESMO) is the first student mission to the Moon. Promoted and directed by ESA, ESMO represents a “unique and inspirational opportunity for university students, providing them with valuable and challenging hands-on space project experience in order to fully prepare a well qualified workforce for future ESA missions, particularly those planned by the Exploration and Science programmes in the next decades” [1]. The mini-satellite class ESMO Orbiter is launched as an auxiliary payload into a highly elliptical low inclination Geostationary Transfer Orbit (GTO) using the Ariane Support for Auxiliary Payloads (ASAP) by Ariane 5 or Soyuz from Kourou. An on-board bipropellant liquid thrusters system accomplishes the lunar transfer and the lunar orbit insertion. After Moon orbit injection several scientific objectives will be achieved during the minimum six months mission time [7]. The main objective of this paper is to describe the whole ESMO propulsion system control algorithm and the corresponding simulator [2], which will be used during mission Phases C, D and especially during mission operations. More in details, the modelled Fuel Management System is in charge of the control of the entire propulsion system, regulating the propellant flow for the different orbital manoeuvres.