Minimizing Proton Displacement Damage Dose During Electric Orbit Raising of Satellites

Dutta, Atri; Kasdin, N. Jeremy; Choueiri, Edgar Y.; Francken, Philippe

doi:10.2514/1.g000503

Cited by 10 publications

(11 citation statements)

References 17 publications

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“…The Van allen radiation belt are approximated via an analytical model [87]. The Q-law parameters, and the location, direction and magnitude of the chemical firings represents the real variables to be determined, whereas the number of chemical maneuvers and the propulsion system decision-making process is modeled as integer variables.…”

Section: Molto-ormentioning

confidence: 99%

“…Radiation Environment: Following the same approach as in Ref. [87], the geomagnetic field is modeled by considering a magnetic dipole with an axis parallel to the Earth's magnetic axis passing through its center of mass. The omnidirectional radiation flux is defined as the flux of all particles averaged over all directions at any location owing to charged particles, namely protons and electrons, and it can be computed as a function of the McIlwain's coordinate Λ and the latitude φ e .…”

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

“…To this end, approximate analytical expressions are derived in Ref. [87]. Furthermore, it is known that the inner Van Allen belt, which is mainly composed of protons, is significantly more hazardous compared to the outer belt, which is mainly composed of electrons.…”

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

“…Furthermore, it is known that the inner Van Allen belt, which is mainly composed of protons, is significantly more hazardous compared to the outer belt, which is mainly composed of electrons. In fact, it has been shown that the radiation damage from electrons during orbit-raising represents a small fraction of what the satellite undergoes in GEO over a period of 10-15 years [87].…”

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

“…The omnidirectional flux of protons of energy equal or greater than E can be expressed by the following analytical form derived in Ref. [87]:…”

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

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Heuristic method based on Generalized Logarithmic Spirals for Low-Thrust trajectory design

González

Sanjurjo-Rivo

Arnedo

2016

AIAA/AAS Astrodynamics Specialist Conference

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Department of Bioengineering and Aerospace EngineeringHybrid Multi-Objective Trajectory Optimization of Low-Thrust Space Mission Design by David Morante GonzálezThe overall goal of this dissertation is to develop multi-objective optimization algorithms for computing low-thrust trajectories. The thesis is motivated by the increasing number of space projects that will benefit from low-thrust propulsion technologies to gain unprecedented scientific, economic and social return. The low-cost design of such missions and the inclusion of concurrent engineering practices during the preliminary design phase demand advanced tools to rapidly explore different solutions and to benchmark them with respect to multiple conflicting criteria. However, the determination of optimal low-thrust transfers is a challenging task and remains an active research field that seeks performance improvements. This work contributes to increase the efficiency of searching wide design spaces, reduce the amount of necessary human involvement, and enhance the capabilities to include complex operational constraints. To that end, the general low-thrust trajectory optimization problem is stated as a multi-objective Hybrid Optimal Control Problem. This formulation allows to simultaneously optimize discrete decisionmaking processes, discrete dynamics, and the continuous low-thrust steering law. Within this framework, a sequential two-step solution approach is devised for two different scenarios. ContentsAcknowledgements v

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Section: Molto-ormentioning

confidence: 99%

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

Section: Chemical Propulsion Burnsmentioning

confidence: 99%

“…The omnidirectional flux of protons of energy equal or greater than E can be expressed by the following analytical form derived in Ref. [87]:…”

Section: Chemical Propulsion Burnsmentioning

confidence: 99%