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 19 of 19 for “"Aileron"”.
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Investigation of a hydraulic-boost aileron control system
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1949.
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Aerodynamic analysis and optimisation of a servo-controlled aileron
… smart materials could be employed to control the aileron deflections via the tab, using with an electrically-actuated system instead of the bulky hydraulics currently used. In a collaboration between a leading aircraft manufacturer and four South African universities, potentially more efficient …
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An experimental investigation of oblique wing static aeroelastic phenomena
… clamped oblique wings. The wing sweep and aileron deflection angles were varied throughout a wide range of dynamic pressures. The wing structure was also stiffened. Strains were measured in the swept forward wing panels. Results from these tests showed that increasing the wing structural …
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On the development of computer code for aircraft flight dynamics analysis
… developed computer code provide 2 option how the aileron are deflected, they are namely (1) a single double impulse aileron and (2) a multiple doublet 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 …
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Design Demonstration and Optimization of a Morphing Aircraft Control Surface Using Flexible Matrix Composite Actuators
… on this FMC active spoiler concept a morphing aileron design was examined. To do this an analysis coupling the structure, fluid, and FMC actuator models was created. This allows for optimization of the design with the objectives of minimizing the hydraulic energy required and mass of the system …
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Active Flight Path Control for an Induced Spin Flight Termination System
… to a failure, the aerodynamic 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 …
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Adaptive Control of Micro Air Vehicles
… The schemes control both roll and pitch through aileron and elevator commands. Flight test results for the schemes are also compared.
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Macro Fiber Composite Actuated Unmanned Air Vehicles: Design, Development, and Testing
… was flown using two MFC patches in an elevator/aileron (elevon) configuration. Preliminary testing has proven the stability and control of the design. Flight tests were performed to quantify roll control using the actuators. Force and moment coefficients were measured in a low-speed, open …
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Numerical simulation and control of a fluid structure interaction for a plate in a transverse flow
… applications in engineering, such as the aileron on an airplane. Here an approach is proposed where a CFD method is coupled with a controller to provide a qualitative flow model, and a tool for the development and the validation of the control scheme. A rotating rigid flat plate in …
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Design and Control Considerations for a Skid-to-Turn Unmanned Aerial Vehicle
… four loop closures and utilizing both rudder and aileron for control was developed. Any outside guidance system that navigates using a heading command can easily be integrated into this controller design. Simulations show this controller enables the NXT UAV to accomplish up to 3 G wings level …
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Fatigue Characteristics of Pressurized Artificial Muscles
… artificial muscle. Finally a morphing aileron utilizing pressurized artificial muscles as the actuation mechanism is fatigue tested. Fatigue testing results show that pressurized artificial muscle fatigue life is dependent on both actuator materials and geometry. Latex rubber bladders …
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Integrated strain actuation in aircraft with highly flexible composite wings
… three representative conventional vehicles using aileron control are modeled. The vehicles are based on fielded unmanned aerial vehicles (UAV), representing low, medium, and high altitude classes. The ISA wings are modeled by replacing some of the passive composite plies in with APC. The active …
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Aircraft System Identification Approach for Control Surface Fault Diagnosis
… containing an artificially injected stuck left-aileron fault, implemented through a custom maneuver injection capability, with multisine excitation inputs applied to the control effectors. The estimated control-effectiveness parameters associated with the faulted surface displayed an immediate …
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Aerodynamic Analysis of Variable Geometry Raked Wingtips for Mid-Range Transonic Transport Aircraft
… VGRWT/NCE tip as a function of sweep angle and aileron deflection compared to the baseline wing. A side study of the effects of the joint between the main wing and the movable tip showed that the drag impact can be kept small by careful design.
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Aircraft Abnormal Conditions Detection, Identification, and Evaluation Using Innate and Adaptive Immune Systems Interaction
… this work include locked actuators (stabilator, aileron, rudder, and throttle), structural damage of the wing, horizontal tail, and vertical tail, malfunctioning sensors, and reduced engine effectiveness. The results of applying the proposed approach to this wide range of abnormal conditions show …
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Adaptive Quaternion Control for a Miniature Tailsitter UAV
… three conventional control surface actuators (aileron, elevator, and rudder) barring saturation and assuming accurate system identification. Testing of attitude control algorithms requires development in quaternion-based navigational control and attitude estimation. A novel technique for hover …
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Electromagnetic Interference Attacks on Cyber-Physical Systems: Theory, Demonstration, and Defense
… or take control of the flight surfaces (e.g., aileron) which results in a crash of the UAV or a controllable change in its trajectory, respectively. Serial communication protocols such as UART or SPI are widely employed in electronic systems to establish communication between peripherals (e.g., …
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On-Board Artificial Intelligence for Failure Detection and Safe Trajectory Generation
<p>The use of autonomous flight vehicles has recently increased due to their versatility and capability of carrying out different type of missions in a wide range of flight conditions. Adequate commanded trajectory generation and modification, as well as high-performance trajectory tracking control …