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.
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Showing 1 to 20 of 101 for “"flight path"”.
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Terminal area flight path generation using parallel constraint propagation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Design and Flight-Path Simulation of a Dynamic-Soaring UAV
… aerial vehicle (UAV) optimized for long-duration flight with no on-board power consumption. The UAV’s aerodynamic properties are captured with the integration of variable fidelity aerodynamic analyses. In addition to this, a 6 degree-of-freedom flight simulation environment is designed to include …
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Collocation With Nonlinear Programming for Two-Sided Flight Path Optimization
… numerical method for the problem of two-sided flight path optimization, that is, a method capable of finding trajectories satisfying the necessary condition of an open-loop representation of a saddle-point trajectory. The method of direct collocation with nonlinear programming is extended to …
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Supporting Pilot Performance With an Integrated Flight Path Head -Up Display
Because the pathway display shares motion with outside elements, it was hypothesized that a pathway HUD may enhance tracking and detection when compared to its head-down counterpart. In two experiments, performance with a HUD was compared to performance head-down, and pilots performed a series of …
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Active Flight Path Control for an Induced Spin Flight Termination System
… their nominal positions to ``slant'' the helical flight path in a desired direction relative to the atmosphere, whether to attain a desired impact location, to counter a steady wind, or both. The effectiveness of the control law was evaluated in numerical simulations of a general transport model …
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Data-driven flight path rerouting during adverse weather: Design and development of a passenger-centric model and framework for alternative flight path generation using nature inspired techniques
A major factor that negatively impacts flight operations globally is adverse weather. To reduce the impact of adverse weather, avoidance procedures such as finding an alternative flight path can usually be carried out. However, such procedures usually introduce extra costs such as flight delay. …
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An evaluation of automation for flight path management in transport category aircraft
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Characterization of droplet flight path and mass flux in droplet-based manufacturing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Effects of Musical Ability on Flight Planning, Situational Awareness, and Flight Path Deviations
… and pilot performance, specifically related to flight planning, situational awareness, and flight path deviations. This study was a quasi-experimental design studying 20 pilots with musical training and 20 pilots without musical training. Participants were assessed through a series of tests. The …
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Steering of a boost vehicle to a desired flight path angle trajectory using angle of attack control
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1983.
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An Analysis of the Immersed Perspective Flight Path Display Benefit: Benefits of Preview, Prediction, and Frame of Reference
The results showed that preview benefits were greater than those of prediction. An interaction of prediction and preview was found, with the benefits of prediction sometimes being contingent on the presence of preview. Explanations of control order account for the finding that prediction and …
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Conformal Flight Path Symbology for Head-Up Displays: Defining the Distribution of Visual Attention in Three-Dimensional Space
Theories of allocation of attention were used to interpret the experimental findings. Attention was found to be more widely distributed in X-Y space when the pilots were flying with the conformal, tunnel-in-the-sky as compared to the partially conformal ILS (instrument landing system) symbology …
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Boost through reentry trajectory planning for maneuvering reentry vehicles
… in the Aimpoint Map, a set of velocities and flight path angles exist that can be reached from launch as well as a set of velocities and flight path angles that allow the target to be reached from the piercepoint. The intersection of these velocity and flight path angle sets provides important …
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Probabilistic Estimation of State via Propagation of Error for a Collision Warning System
… of Aeronautics \& Astronautics Autonomous Flight System Laboratory (AFSL) is collaborating with Insitu, a UAS company, to develop a collision warning and awareness plugin (CAPlugin) for Insitu's Common Open-mission Management Command and Control (ICOMC2) system. The CAPlugin operates …
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Time domain synthetic aperture radar image processing using fast factorised backprojection
… an isotropic antenna along an arbitrary curved flight path of infinite length. This means that the focusing of a image using filtered backprojection is only limited by a finite bandwidth, non isotropic beam width and a finite flight path length. However filtered backprojection with an operation …
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Optimal lift and drag modulation hypersonic control options for high ballistic coefficient entry vehicles at Mars
… state had a strong, direct relationship to entry flight-path angle with at most two-switches for lift control and at most four switches for drag control. Drag-only control was found to be better than lift-only control at steep entry flight path angles while lift-and-drag control was better than …
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Understanding the effect of cognitive reference frames on unmanned aircraft operations
… frame, such as a map. The pilot plans a flight path, to this target, on a north-up map, but controls the aircraft along that flight path using an aircraft-view reference frame that offers a forward-looking cockpit view. Finally, the sensor operator controls the sensor to point at the …
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Quantitative Approach and Departure Risk Assessment for Unmanned Aerial Systems
… parties on the ground associated with a given flight plan. The main area of focus was on large rotorcraft and fixed-wing aircraft that are used by the military and that have the potential to do large amounts of damage if a crash were to occur. How unique types of failures affect the ground area …
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The design and construction of a flying bird robot
… regard to the biomechanical issues involved in flight and uses control systems that emulate the ones used by the bird to control the flight path.
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Synthetic aperture radar image simulator for interferometry
… inputs of a digital elevation model (DEM), flight path, description, radar parameters, a terrain classification map and temporal decorrelation factors. Output images include the following images: radar cross section, power, total coherence, temporal cohernece factor, geometrical coherence …
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