Optimal Trajectories for Planetary Pole-Sitter Missions

Optimal Trajectories for Planetary Pole-Sitter Missions

Generation of Optimal Trajectories for Earth Hybrid Pole-Sitters

A pole-sitter orbit is a closed path that is constantly above one of the Earth’s poles, by means of continuous low thrust. This work proposes to hybridize solar sail propulsion and solar electric propulsion (SEP) on the same spacecraft, to enable such a pole-sitter orbit. Locally-optimal control laws are found with a semi-analytical inverse method, starting from a trajectory that satisfies the ...

Workshop on Instrumentation for Planetary Missions ( 2012 )

Introduction: The Juno mission is the second mission in NASA’s New Frontiers program. Launched in August 2011, Juno arrives at Jupiter in 2016 for a one year prime mission. Juno science goals include the study of Jupiter’s origin, interior structure, deep atmosphere, aurora and magnetosphere. Juno’s orbit around Jupiter is a polar elliptical orbit with perijove approximately 5000 km above the v...

Biomechanical Investigation of Empirical Optimal Trajectories Introduced for Snatch Weightlifting

The optimal barbell trajectory for snatch weightlifting has been achieved empirically by several researchers. They have studied the differences between the elite weightlifters’ movement patterns and suggested three optimal barbell trajectories (type A, B, and C). But they didn’t agree for introducing the best trajectory. One of the reasons is this idea that the selected criterion by researchers...

Thrust - Limited Optimal Three - Dimensional Spacecraft Trajectories

Several optimal three-dimensional orbital transfer problems are solved for thrust-limited spacecrafts using collocation and nonlinear programming techniques. The solutions for full nonlinear equations of motion are obtained where the integrals of the free Keplerian motion in three dimensions are utilized for coasting arcs. In order to limit the solution space, interior-point constraints are use...