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 20 of 20 for “"Lunar Landing"”.
-
Skyflower: A Reusable Tethered Lunar Landing System
… of delivering substantial payload mass to the lunar surface. While commercial partnerships under programs like CLPS (Commercial Lunar Payload Services) and HLS (Human Landing System) have made progress, these efforts primarily address small-scale payload delivery or crewed missions. The current …
-
Human-automation interaction for lunar landing aimpoint redesignation
… interact with the vehicle systems. In future lunar landings, astronauts working in conjunction with automated systems will need to select a safe and achievable landing aimpoint. Ultimately, this decision could risk the safety of the astronauts and the success of their mission. Careful study is …
-
Human spatial orientation perceptions during simulated lunar landing
During crewed lunar landings, astronauts are expected to guide a stable and controlled descent to a landing zone that is level and free of hazards by either making landing point (LP) redesignations or taking direct manual control. However, vestibular and visual sensorimotor limitations unique to …
-
Near-optimal feedback guidance for an accurate lunar landing
… research presents a novel guidance method for a lunar landing problem. The method facilitates efficiency and autonomy in a landing. The lunar landing problem is posed as a finite-time, fixed-terminal, optimal control problem. As a key finding of this work, the method of solution that is applied …
-
Human-automation task allocation in lunar landing: simulation and experiments
… were applied here to the case scenario of lunar landing with a single human pilot. A task analysis was performed on a hypothetical generic lunar landing mission, focusing on decisions and actions that could be assigned to the pilot or to automation during the braking, approach, and …
-
Lunar landing : dynamic operator interaction with multi-modal automation systems
… (LOA) in several case studies and in a simulated lunar landing was investigated in anticipation of future lunar missions. Endsley's situation awareness model (extended to apply to supervisory control systems) and the Sheridan/Verplank and Proud/Hart LOA scales were used to analyze six maritime, …
-
The effect of dust blowback on spatial orientation estimation during lunar landing
Landing is a dangerous and complex phase of any flight. Landing on an airless, dusty world presents unique challenges to perception, including dust blowback. During crewed lunar landings, astronauts will either be directly piloting the lander or supervising the automation in the event they need to …
-
Constrained trajectory optimization of a soft lunar landing from a parking orbit
A trajectory optimization study for a soft landing on the Moon, which analyzed the effects of adding operationally based constraints on the behavior of the minimum fuel trajectory, has been completed. Metrics of trajectory evaluation included fuel expenditure, terminal attitude, thrust histories, …
-
Design and evaluation of an achievability contour display for piloted lunar landing
Landing on the moon requires the selection and identification of a location that is level and free of hazards, along with a stable, controlled descent to the lunar surface through the use of automated systems and manual control. Spatial disorientation may occur upon reentering a gravitational field …
-
Experiments and a model of pilot system failure detection during simulated Lunar landing
… pilot performing a high workload, time critical, lunar landing task and aims to: 1) quantify the pilots' ability to detect different system failures in various control modes either with or without motion cues, 2) determine how pilots' visual attention changes in different control modes and just …
-
Lunar descent using sequential engine shutdown
… shutdown is introduced and its application to lunar descent is motivated. The concept calls for the utilization of multiple fixed thrust engines in place of a single continuously throttleable engine. Downrange position control is provided by properly timed engine shutdowns. The principle …
-
Dynamic Analysis of CubeSat Impact on Lunar Surface
… as a payload of the Intuitive Machines Nova-C lunar lander. The CubeSat’s purpose is to record the lunar landing from a 3rd person view. Unlike other CubeSats, EagleCam is designed to impact the lunar surface and there is no history to build off of. Specifically, EagleCam will need to survive a …
-
Outlier-Robust Multi-View Triangulation Using Graduated Non-Convexity for Space Vehicle Navigation
… estimate the spacecraft’s pose during planetary landing and navigation. This thesis seeks to improve current multi-view triangulation methods to optimally perform with an outlier-dominant (>50% outlier) dataset. Outlier-dominant situations may occur in cases of extreme environmental changes (poor …
-
Analyzing the effects of dynamic task allocation on human-automation system performance
… experiment, twelve subjects sat at a fixed-base lunar landing simulator and initiated transitions between automatic and two manual control modes. Visual fixations were recorded with an eye tracker, and subjects' mental workload and situation awareness were measured using the responses to a …
-
Sustainable Spacefaring: Exploration of scrap metal powder metallurgy on the lunar surface
… as Additive Manufacturing (AM) feedstock for the lunar surface with the goal of exploring the lunar architectural surface needs for a powder metallurgy processing facility and recommend areas of improvement for the design of future spacecraft to ease the proposed recycling process. While metals …
-
Simulating Apollo: Flight Simulation Technology 1945-1975
… flight controllers would experience the actual lunar missions. The detailed choreography of the Apollo missions, instantiated in software, procedures, checklists, flight plans, and mission rules, was refined through extensive simulations. The Apollo simulations precisely orchestrated how future …
-
Between Being and Becoming: How Might Surprise Create New Meaning Co-ontologically in the Design Production and Reception of Immersive-Media?
… through a reconstruction of the Apollo 11 lunar landing – an example of the exploration of a new world - this practice-based thesis illuminates surprise as an anamnesis; a remembering of something forgotten from a past that may not have been lived in the present lifetime. By making the …
-
Motion perception with conflicting or congruent visual and vestibular cues
… a long space flight. What motion profiles in a lunar landing simulator on Earth will best prepare astronauts for the real task in an altered gravity environment? Far from being a problem restricted to a human operator, the aerospace systems themselves face the same challenge of integrating …
-
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 …