Mission Capability Gains from Multi-Mode Propulsion Thrust Profile Variations for a Plane Change Maneuver
AIAA Modeling and Simulation Technologies Conference
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... ters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. required. The utilization of a multi-mode propulsion (MMP) system could greatly reduce the amount of propellant required for the maneuver. MMP refers to a propulsion system that couples an electric and chemical propulsion system which utilizes the same propellant and piping. A fully coupled system provides many advantages over a spacecraft with a single chemical or electric propulsion system. The trade space created by the utilization of a MMP system as compared with only a chemical or electric propulsion system is described, as well as the effect of various thrust profiles on a plane change mission. The spacecraft analyzed had a mass of 180 kg and was required to perform a 15 deg plane change within 90 days. The chemical system alone required more than the 80 kg of available propellant to complete the maneuver. Numerous thrust profiles were analyzed for the electric propulsion system, as well as a combined electric/chemical system. Development of equations and the analysis method are described. The electric propulsion system thrusting constantly was able to achieve the plane change within the time limit.