Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"atmospheric entry"”.
-
Guidance parameters and constraints for controlled atmospheric entry
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1960.
-
Linear covariance analysis of atmospheric entry for sample return mission
… is performed on an example sample return atmospheric entry mission. The example mission is an unguided entry vehicle similar to the Stardust Sample Return Mission. Flight dynamics for entry are modeled with the three-degree-of-freedom translational equations of motion. Uncertainty in …
-
An adaptive numeric predictor-corrector guidance algorithm for atmospheric entry vehicles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1987.
-
Characterization of Microwave Cavity Discharges in a Supersonic Flow
… flowing microwave discharge to validate Martian atmospheric entry models and explore the prospect of harvesting Martian entry plasma. The interactions between the Martian atmosphere and the Mars Landers have been a challenging issue from the very beginning of Mars exploration. During the entry …
-
The content and stable isotopic composition of carbon in spherical micrometeorites
… are extraterrestrial bodies that have survived atmospheric entry to be found on Earth as grains <1mm in diameter. Of the annual flux of extraterrestrial material to the Earth <i>ca</i>.99% is supplied by the micrometeorites. The lifetime of the micrometeroids in the interplanetary medium in …
-
Ab Initio Computation of Radiative Properties of Monatomic Hydrogen
<p>With renewed interest in planetary atmospheric entry, descent, and landing, NASA has noted a need for improved physics modeling in computational fluid dynamics. Uncertainty in experimental data used in radiation heat transfer computations leads to “over-engineering” of entry body heat shields, …
-
Mars entry navigation performance analysis using Monte Carlo techniques
An atmospheric entry and descent full-state navigation filter is developed and presented. Using this filter a navigation performance analysis is performed to examine the effects of various instrument packages and differing sensor scenarios for the entry and descent phase of the Mars Aerial …
-
Managing energy and mode transitions in skip entry guidance for lunar return trajectories
Skip entry trajectories provide a technique for returning an astronaut crew from the Moon to a continental United States landing site at any time during the lunar month. This approach to atmospheric entry requires that the guidance system be capable of precisely targeting a vast array of downrange …
-
NEOimpactor: a tool for assessing Earth's vulnerability to the NEO impact hazard
… asteroid<br/>impact require modelling. While the atmospheric entry of asteroids is a critical<br/>part of the impact process, it is the surface impact which is most important, both onto<br/>land and into the oceans. It is the impact generated effects (IGEs) that are hazardous<br/>to human …
-
New numerical methods for open-loop and feedback solutions to dynamic optimization problems
… is computed and tested for the heat-load-limited atmospheric-turn guidance of an aeroassisted transfer vehicle. The performance of this explicit guidance scheme is found to be very promising; initial errors in atmospheric entry due to simulated thruster misfirings are found to be accurately …
-
Characterization of carbon ablators for hypersonic thermal protection systems
Hypersonic entry of a planetary atmosphere is among the most demanding environments in engineering, where a vehicle's kinetic energy is rapidly converted to thermal energy, generating extreme heat and caustic chemical conditions that rapidly destroy even the most advanced materials. Surviving such …
-
Construction of predictive uncertainty quantification framework to the extension of TPS plasma wind tunnel experiment data to flight conditions
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms