Trajectory and aeroheating environment development and sensitivity analysis for capsule-shaped vehicles... For aerocapture, trajectories were generated for a range of values of initial velocity and ballistic coefficient that, when combined with proper initial flight path angles, resulted in achieving a low Earth orbit either by employing a full lift vector up or full lift vector down attitude....
Schematic representation of pedal kinematics for trackmaker c explaining the mechanism of footprint formation on a substrate with saturated water content.... phase, only the digits are in contact with the distal substrate dragging a portion up and forward, a smaller reaction force counteracts foot movement (small black arrow); D) full lift-off phase, the substrate portion loaded on the toes drops down (white arrow) into the first distal half of the footprint.
Minimum radiative heat-load aerocapture guidance with attitude-kinematics constraints... It is analytically proven that radiative heat load is minimized by the same trajectory that Minimizes The Final Δ V: a bang-bang trajectory, with full lift-up, full lift-down commands....
Evaluation of an optimal aerocapture guidance algorithm for human mars missions... This closed-loop guidance algorithm uses a mathematically optimal bang-bang bank angle profile structure, in which a vehicle first flies with the lift vector pointed straight up, and then flies full lift-down until atmospheric exit....
