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Showing 1 to 15 of 15 for “"Reentry vehicle"”.
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On the linearized atmospheric contributions to reentry vehicle Cep
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1964.
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Terminal control of a variable-stability slender reentry vehicle
… schemes are applied to a proposed slender reentry vehicle, controlled by two separately-articulating flaps. The flap deflections are summarized as symmetric and asymmetric flap deflections; the former manipulates the drag, lift-curve slope, and static margin; the latter controls the vehicle …
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Reentry Vehicle Aerodynamics and Control at Very High Angle of Attack
In recent flight tests the X-38 reentry test vehicle spins during the deployment of the drogue parachute. An experimental aerodynamic study has been conducted at the University of Illinois using a scale model of the X-38 to explore the cause of this problem. A six-component sting balance was used …
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Precession damping and axial velocity control of a lightweight reentry vehicle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Robust estimation and failure detection for reentry vehicle attitude control systems
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.
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Boost through reentry trajectory planning for maneuvering reentry vehicles
… rapidly planning a long range, boost-through- reentry mission, using a lightweight, highly maneuverable reentry vehicle. An Aimpoint Map, a set of all possible piercepoints through which a boost-through-reentry trajectory can be flown to a fixed target, contains valuable information about the …
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Analysis of a target defense game
A maneuvering reentry vehicle (evader) and missile interceptor (pursuer) engagement is modeled in two dimensions, with constant velocity vehicles subject to bounded accelerations. Parameterized guidance laws are constructed for both players and a continuous, but finite-dimensional game is …
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Improved convergence for optimization of evasive maneuvering
… evasive maneuvers for a Maneuvering Reentry Vehicle (MaRV) attacking a target defended with Anti-Ballistic Missiles (ABMs). The problem is large in terms of the number of optimization parameters, and perhaps in terms of the number of nonlinear constraints. Since both MaRV and ABM …
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New methodologies for onboard generation of Terminal Area Energy Management trajectories for autonomous reusable launch vehicles
… greatly increases an autonomous reusable launch vehicle's capacity for recovering from unexpected disturbances or anomalous conditions. Such capability dispenses with the routine of pre-defined, mission specific trajectories and contingencies, which has been in use since the early days of the …
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Optimal trajectory design under uncertainty
Reference trajectory design for atmospheric reentry vehicles can be accomplished through trajectory optimization using optimal control techniques. However, this method generally focuses on nominal vehicle performance and does not include robustness considerations during trajectory design. This …
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Optimal trajectory-shaping with sensitivity and covariance techniques
… then applied to a generic hypersonic recoverable reentry vehicle. The trajectories include uncertainties in atmospheric density, axial and normal force coefficients, commanded attitude, and initial position and velocity. Reachability footprints with uncertainty bounds are generated by the …
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An airbag-based crew impact attenuation system for the Orion Crew Exploration Vehicle
It is a well known fact that every capsule-shaped reentry vehicle developed by NASA was initially conceived to land on land, but was ultimately designed to land in water. In all cases, the primary factor contributing to this fundamental shift was related to difficulties with keeping the vehicle to …
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Batch-microfabricated miniaturized planar arrays of Langmuir probes for reentry plasma diagnostics and nanosatellites
… goals in spacecraft design is maintaining the vehicle's integrity under the extreme conditions encountered during reentry to the Earth's atmosphere. When a hypersonic vehicle travels through the atmosphere, a high-density and low-temperature plasma sheath forms around it due to shock heating of …
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Damping Effects of Drogue Parachutes on Orion Crew Module Dynamics
… to the CM dynamics for preliminary entry vehicle system design. More wake effects should be included to better model the system. These results are being used to improve simulation model fidelity of CM flight with drogues deployed, which has been identified by the project as key to a …
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Reducing turbulence- and transition-driven uncertainty in aerothermodynamic heating predictions for blunt-bodied reentry vehicles
… those found on the NASA Orion Multi-Purpose Crew Vehicle (MPCV) thermal protection system during atmospheric reentry from the International Space Station have been studied by direct numerical simulation, with the ultimate goal of reducing aerothermodynamic heating prediction uncertainty. …