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 16 of 16 for “"Thrust vectoring"”.
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Aerospike Thrust Vectoring Slot-Type Compound Nozzle
A study of thrust vectoring techniques of annular aerospike nozzles was conducted. Cold-flow blow-down testing along with solid modeling and rapid prototyping technology were used to investigate the effects of slot size, placement, geometry and orientation. The use of slot-type compound nozzles …
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Hole-Type Aerospike Compound Nozzle Thrust Vectoring
… study to determine the feasibility of thrust vectoring an aerospike nozzle with the addition of a secondary port. Earlier phases of the study have indicated that a compound aerospike nozzle could provide sufficient thrust vectoring. The addition of a hole-type secondary port was found …
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Fluidic Thrust Vectoring of Actively Controlled Nozzle Flows
L'abstract è presente nell'allegato / the abstract is in the attachment
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Conceptual design of a thrust-vectoring tailcone for underwater robotics
Thrust-vectoring on Autonomous Underwater Vehicles is an appealing directional-control solution because it improves turning radius capabilities. Unfortunately, thrust-vectoring requires the entire propulsion system be articulated in two degrees of freedom. Consequently, substantial internal volume …
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Quasi-optimal steady state and transient maneuvers with and without thrust vectoring
… performance fighter aircraft with and without thrust vectoring are investigated. The steady state aspect of these studies determines control combinations with and without thrust vectoring which optimize selected level-flight point performance criteria including minimum speed, maximum …
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Modeling and flight testing of differential thrust and thrust vectoring on a small UAV
… to the aircraft during nominal, differential thrust, and thrust vectored flight configurations, and verify this modeling through simulation and flight testing experiments. This thesis outlines the modeling process, simulator development, design, and implementation of a propulsion assisted …
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Design, Development, and Testing of a Conformal Power Control Interface for Thrust Vectoring Aircraft
… indicate both the direction and magnitude of thrust conformally. The purpose of the RTI is to provide an interface that maps to the intended vehicle response throughout ALL ranges of operation. Doing so is expected to reduce confusion that may have contributed to several tiltrotor …
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Propulsion system analysis for conceptual design: drag and losses of nozzles and mixed compression inlets
… geometries are considered, as are non thrust-vectoring nozzles. Only the internal losses of these nozzles are considered, and these losses are characterized by the thrust coefficient. The results of this survey have also been added to ACSYNT to extend the thrust prediction capabilities …
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Time-optimal reorientation maneuvers of an aircraft
… of a combat aircraft, with and without thrust-vectoring capability, was analyzed. An accurate mathematical model for the reorientation maneuvers of interest was developed, to ensure practical value of the analysis. In particular, an effective method for smooth fitting of the aerodynamic …
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Guidance, Navigation and Control of a Fly-By-Wire Transport Category Airship Designed for Hover Cargo Delivery
… a transport category airship propelled with six thrust vectoring engines, and to develop control laws to maintain position, heading, and attitude during hover and cargo operations. Owing to the large body area, most airships require that they be pointed into the wind to maintain their position. …
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Aero-propulsive characteristics of an overwing distributed electric propulsion system with vectored thrust
… ducted fan system was tested with varied thrust angles achieved by deflecting the fan exit flow direction. The DEP system was comprised of five electric fans mounted on the upper surface of the airfoil trailing edge. The electric ducted fans were sized with a diameter-to-chord ratio of …
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Radio-Frequency Plasma Expansion in Different Magnetic Nozzle Configurations
… improve the efficiency of radio-frequency plasma thrusters and explore the feasibility of magnetic thrust vectoring. Spatial measurements of the ion saturation current and floating potential in the plume revealed a negative potential region at the location of maximum ion current along the field …
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Design of a Hybrid Micro Aerial Vehicle Concept with Multicopter and Vectored Thrust Modes of Flight
… and a rocket-like mode of flight controlled via thrust vectoring. We discuss the mechanical design of the REAVER prototype, including an initial trade study on propulsion methods, the mechanical design of the vehicle, and its simulated aerodynamic performance. We also evaluate the performance of …
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Performance mechanisms and integration of high-lift distributed propulsion systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Force-Canceling Mixer Algorithm for Vehicles with Fully-Articulated Radially Symmetric Thruster Arrays
… utilize automatic cancellation of excessive thruster forces to maintain precise control despite little or no throttle authority. After defining the physical attributes of the new vehicle, a flight control mixer algorithm is defined and presented. This mixer is an input/output abstraction that …