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 51 for “"rudder"”.
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Rudder roll reduction for small ships
… extreme, dangerous. It is possible to use the rudder to reduce roll motion as has been demonstrated by others on naval and coastguard vessels. For this study, five controllers were chosen and designed to implement a rudder roll reduction system as part of an autopilot on a fishing vessel. A …
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Analysis of flapped rudder gap effects.
Massachusetts Institute of Technology. Dept. of Ocean Engineering. Thesis. 1971. Nav.E.
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Rudder investigation of the "Ruweida III"
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Naval Architecture and Marine Engineering, 1923.
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James Earl Rudder: A Lesson in Leadership
This thesis is the about the life of Rudder. The emphasis of this work, however, is that Rudder was successful primarily because of his character and leadership style. Much of the study was drawn from primary sources. Secondary sources were also consulted. This thesis opens with a brief …
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Design of automatic rudder coordination systems for aircraft
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1959.
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Propeller tip vortex impingement and vibratory force on a rudder.
Massachusetts Institute of Technology. Dept. of Ocean Engineering. Thesis. 1974. M.S. (Also M.S. in Mechanical Engineering).
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Development of a design cycle for an additively manufactured aircraft rudder bracket
For traditional manufacturing processes, the variation of component quality and mechanical properties exists but these can be minimised by the implementation of process controls. Hence, it becomes key to define the full process for developing and manufacturing components. These processes have been …
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Numerical simulation of unsteady rotor/stator interaction and application to propeller/rudder combination
… the unsteady performance of a propeller and its rudder. The method is first developed and tested in two-dimensions by using a boundary element method in which a front hydrofoil is moving downward, while a back hydrofoil is stationary. The wakes of the two hydrofoils are modeled by continuous …
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Prediction of ship rudder-propeller interaction using parallel computations and wind tunnel measurements
… developed due to the interaction between a ship rudder and propeller. A parallel lifting suface panel program (PALISUPAN) has been written in Occam2 which is designed to run across variable sized square arrays of transputers. This program forms the basis of the theoretical method. The rudder and …
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Robust Yaw/roll Control of High-Speed Containerships
… to obtain reasonable operating results. Hence, rudder-only control and rudder/fin control were introduced. Using comprehensive models that modeled yaw, sway, surge, and roll; and all significant coupling modes, a new performance index was established and an effective controller was designed to …
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On the development of computer code for aircraft flight dynamics analysis
… impulse aileron. While from the point of view rudder is also having two type of deflection, namely (1) a single double impulse rudder and (2) a multiple double impulse rudder. These types of control surfaces deflection applied to case of Cessna – 182, Beech – 99, Lear Jet – M24 and The Lockheed …
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High performance path following for marine vehicles using azimuthing podded propulsion
… for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis to a specified azimuth angle, the entire thrust of the propeller contributes to the steering moment without relying on lift generation by a control surface such as a rudder. …
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Updating the Embedded System of an Autonomous Sailboat
… lab proposed a sailboat design in which the rudder control surface operated in the air, rather than in the water, resulting in a dynamically stable sailboat with respect to the relative wind. The boat design has taken shape. In terms of hardware, some components have been designed, …
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Design trade studies and assessment for advanced quiet aircraft concepts
… and airframe (airfoil, elevator, slat, drag rudder, and undercarriage) noise sources were investigated in terms of their noise footprints and, more specically, the loudest noise caused outside the airport boundary. The greatest noise source was the drag rudder, which was required to offset …
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Aeroacoustics of perforated drag plates for quiet transport aircraft
… plates. The idea behind a quiet spoiler or drag rudder is to alter the noise production mechanism by perforating the drag plates. The hypothesis is that the large length scales responsible for the noise radiated by unsteady vortical structures can be changed to small length scales driving jet …
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Biomimetic improvement of the maneuvering qualities of unmanned underwater vehicles
… of the REMUS AUV. The model included body and rudder lift forces and moments, added mass forces and moments, gyroscopic and centrifugal forces, drag forces and moments, and body forces and moments such as buoyancy and gravity terms. To target the horizontal plane maneuvering characteristics, we …
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Implementation of Constrained Control Allocation Techniques Using an Aerodynamic Model of an F-15 Aircraft
… control surfaces (ailerons, elevators, and rudder), to the 3 cockpit controls (longitudinal stick, lateral stick, and rudder pedals). In modern tactical aircraft however, it is not uncommon to find as many as 10 or more control surfaces which, instead of being moved by mechanical linkages, …
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Using Biomimetics to Improve the Maneuvering Performance of the Expendable Mobile Antisubmarine Warfare Training Target (EMATT)
… well as deflect in the opposite direction of the rudder. This thesis derives the equations of motion and hydrodynamic coefficients of the Morpheus vehicle and uses these to investigate the results of adding morphing dorsal fins. Dynamic tow tank experiments were conducted to validate the estimated …
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Research on the Unmanned Aerial Vehicle Design
… for counter Gyro-scopic Effect) and four Rudder-vators Flight Controls (Design for Pitch and Yaw Stability and control). The main aim of the study is to understand the dynamics and control of the vehicle when transiting from vertical take-off to horizontal cruising mode. Both computational …
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Active Flight Path Control for an Induced Spin Flight Termination System
… control surfaces (aileron, elevator, and rudder) are assumed to be functional. Our approach involves two steps: (i) establishing a stable, steady, helical motion for which the control surfaces are not fully deflected and (ii) modulating the aircraft control surfaces about their nominal …
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