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Showing 1 to 12 of 12 for “"Entry guidance"”.
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Entry guidance for abort scenarios
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Fixed-trim re-entry guidance analysis
The terminal guidance problem for a fixed-trim re-entry body is formulated with the objective of synthesizing a closed-loop steering law. A transformation of variables is made that reduces the order of the state system for the guidance problem, and a subsequent linearization with motion along the …
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Integrated entry guidance and control for autonomous reusable launch vehicles
The guidance and control approach employed on current reusable launch vehicles is based on classical control techniques developed for the Space Shuttle more than 20 years ago. This approach partitions the guidance and control tasks into separate loops resulting in a complex control architecture …
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An extended analytic range corrector method for the space shuttle entry guidance algorithm
Space shuttle entry guidance with an extended analytic range corrector method is presented. The guidance method is a variation of Shuttle entry guidance in which the parameters that define the drag profile are modified using quadratic splines to make the drag profile smooth and easier to customize. …
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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 …
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Assessment of application of the steep-lifting entry trajectory solution to real-time entry guidance
Closed-form analytical guidance algorithms are highly desirable in the context of real-time aerospace guidance applications. The steep-lifting entry trajectory solution is a set of closed-form analytical approximate solutions to the planar equations of motion, which includes expressions for range, …
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Mars Precision Entry Vehicle Guidance Using Internal Moving Mass Actuators
… due to current limitations in precision entry guidance and payload deceleration. Precision guidance and large payload deceleration is challenging due to the thin Martian atmosphere, large changes in free stream conditions during entry, and aerothermal and aerodynamic instability concerns …
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Reentry guidance with extended range capability for low L/D spacecraft
A generalized reentry/precision landing algorithm using bank angle modulation control was designed for a low lift-to-drag ratio (L/D) spacecraft that enables precision landing for target locations between 2,400 km and 10,000 km downrange of Entry Interface (EI). The Crew Exploration Vehicle (CEV) …
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Analysis and design of propulsive guidance for atmospheric skip entry trajectories
A study of the ability to use propulsive guidance for atmospheric skip entry trajectories was completed. The analysis centered itself around the proposed design of NASA's Crew Exploration Vehicle. The primary aerodynamic guidance system must execute an atmospheric skip maneuver when attempting to …
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A predictor-corrector guidance algorithm design for a low L/D autonomous re-entry vehicle
… turn-around-times for successive flights. A guidance scheme that best adheres to these goals and captures the vehicle's capability is desired. During re-entry, the PL-RLV's second stage, the Precision Landing Vehicle 2 (PLV-2), will perform a reversal maneuver. This thesis concentrates on a …
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Autonomous guidance and decision-making for planetary aerobraking
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Assessment of aerosurface-based hypersonic control of blunt bodies for planetary entry
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms