(Georgia Institute of Technology, 2005-12-17)
Kipp, Devin Matthew
A Simulated Trajectory Analysis code for Planetary Entry (STAPLE) has been developed
as a contributing disciplinary analysis tool within the framework of a larger entry systems
synthesis tool. STAPLE performs 3-degree of freedom trajectory analysis for atmospheric
flight at arbitrary planetary bodies. The tool is applicable to both ballistic and lifting entry
trajectory simulations and includes a modest guidance capability that enables aerocapture
and controlled entry simulations. Event modeling capabilities include staging, parachute
inflation, parachute release, and propulsive descent based on a gravity turn guidance law.
Performance has been validated against existing analysis codes, Mars Pathfinder flight
experience, and Aeroassist Flight Experiment studies.
(Georgia Institute of Technology, 2005-04-29)
Prakash, Ravi
Two methods of transition to flight for a Titan helicopter were compared:
a lander option and a mid-atmospheric deployment. The methods were
compared based on the ability of each to allow the helicopter to successfully
commence flight as well as satisfy the mass and volume constraints of the
aeroshell. Landing the helicopter before its initial flight proved too massive
for the baseline mission, but an acceptable solution was found with a smaller
helicopter that could achieve a heavily compromised mission. A mid atmospheric deployment satisfied all the criteria while allowing enough mass
for the helicopter to achieve its baseline mission. Although it was the higher
risk option, the ability of the mid-atmospheric deployment to achieve the
baseline mission was the defining factor in its choice as the transition to flight
method for the Titan helicopter.