Interplanetary Travel

Interplanetary Travel - Interplanetary Travel JIN KANG...

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Interplanetary Travel JIN KANG
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Introduction ! Space exploration ! Beyond the Earth ! Moon, mars,… outside solar system ! How do we get from Earth to these exciting new worlds? ! We laid foundation for understanding orbits ! Developed Hohmann Transfer ! Before mass center was Earth ! Now there are multiple mass centers 2
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Content ! Basic equation of motion for interplanetary transfer ! Simplifying assumptions ! Patched-conic Approximation ! Hohmann Transfer (interplanetary) ! Earth departure ! Planetary arrival ! Transfer time of flight ! Gravity assist 3
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Motion Analysis Process ! Define coordinate system ! Derive equation of motion ! Apply simplifying assumptions ! Assign initial conditions ! Perform error analysis ! Test model 4
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Coordinate System ! Revisiting assumptions used for two-body equation of motion around Earth ! There are only two bodies: S/C and Earth ! Earth’s gravitational pull is only force acting on S/C ! For Earth-based problem, geocentric-equatorial frame is suitable ! Beyond Earth, Sun’s pull becomes dominant ! Heliocentric coordinate system more suitable 5
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Interplanetary Travel - Interplanetary Travel JIN KANG...

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