Global ETD Search
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Showing 1 to 9 of 9 for “"Precision Landing"”.
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Entry vehicle performance analysis and atmospheric guidance algorithm for precision landing on Mars
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Simulation Development, Path Planning, and Linear Quadratic Gaussian Precision Landing for Unmanned Traffic Management Operations
… a control and guidance law for tracking and precision landing of quadcopters for future applications of USS and industry applications, utilizing AprilTags with a Linear Quadratic Gaussian (LQG) law. Tests were conducted with the High Fidelity framework developed. Results indicate that the …
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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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Morphing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) Mechanisms and Controls
To enable a crewed mission to Mars, precision landing capabilities of Entry, Descent, and Landing (EDL) systems must be improved. The need for larger payloads, higher landing sites, and controllability has motivated the National Aeronautics and Space Administration (NASA) to invest in new …
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A predictor-corrector guidance algorithm design for a low L/D autonomous re-entry vehicle
The Precision Landing Reusable Launch Vehicle (PL-RLV) is a low L/D, 2-stage craft with a mission plan that calls for low cost, speedy retrieval, and quick turn-around-times for successive flights. A guidance scheme that best adheres to these goals and captures the vehicle's capability is desired. …
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An ecological perceptual aid for precision vertical landings
Pilots of vertical landing vehicles face numerous control challenges which often involve the loss of outside visual perceptual cues or the control of flight parameters within tight constraints. These challenges are often associated with a high mental workload, therefore, a precision landing aid …
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An Iterative LQR Method for Addressing Model Uncertainty in the Mars Entry Problem
Since the moon landing in 1969 sounded the proverbial shotgun inciting efforts to expand the frontiers of space exploration, there has been unparalleled effort to enhance the technologies for doing so. While human presence in Earth orbit has boomed over the past decade, crewed planetary missions …
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Constrained Control for Helicopter Shipboard Operations and Moored Ocean Current Turbine Flight Control
… using two case studies: automatic deck landing during the ship quiescent period in sea state 5, and lateral reposition toward the ship in different wind-over-deck conditions. To improve the overall MPC performance, an updating scheme for the internal model of the MPC is proposed using …
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Characterization and Helicopter Flight Test of 3-D Imaging Flash LIDAR Technology for Safe, Autonomous, and Precise Planetary Landing
… and flight tested under the Autonomous Landing and Hazard Avoidance (ALHAT) project (in its fourth development and field test cycle) which is seeking to develop a guidance, navigation, and control (GNC) and sensing system based on lidar technology capable of enabling safe, precise …