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 44 for “"airspeed"”.
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An electronic airspeed indicator of high precision
Call number: LD2668 .T4 1951 R55
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An electronic airspeed indicator of high precision
Call number: LD2668 .T4 1951 R55
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Optimal arrival time and airspeed selection in the presence of wind uncertainty
… approach. Firstly, it aims to optimize airspeeds by carefully accounting for estimated wind uncertainty to conserve fuel while strictly meeting the Required Time of Arrival (RTA) for individual aircraft operations. This complex optimization process integrates core principles from both …
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The Effects of Angle-of-Attack Indication on Aircraft Control in the Event of an Airspeed Indicator Malfunction
… indication on aircraft control following an airspeed indicator malfunction on final approach. Participants flew a final approach with a target airspeed range of 60 to 65 knots. Once participants slowed the aircraft for final approach, the airspeed indicator needle would be stuck at an …
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A Low-Cost Method of Airspeed Data Acquisition via Image Processing and Experimental Aerodymanic Load Calculation Using Panel Methods
… the focus of this work is on the acquisition of airspeed information through image processing of video footage. The preparation of a Diamond Katana for flight tests is presented with the required certification process. The results show that a load history can be obtained in a cost-effective …
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Development of a Force and Airspeed Data Acquisition System for the Embry-Riddle Aeronautical University 30x40 in. Subsonic Wind Tunnel
<p>The very first objective of performing most experiments is collecting numerical data. Values can be read from instruments or gauges by eye and recorded by hand. However, in certain experiments the amount of data collected may become so large that a human alone can not observe and record the data …
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Evaluation of aircraft performance algorithms in Federal Aviation Administration's Integrated Noise Model
… INM was conducted and improved models for true airspeed, takeoff/climb thrust, level-flight thrust, and climb performance were developed. The true airspeed model with air compressibility correction provides an accurate prediction over a wide range of operating conditions. The quadratic …
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Robust scheduling control of aeroelasticity.
… aeroelastic phenomena over a range of airspeeds. The controllers are constructed using a Linear Parameter Varying (LPV) framework, where the plant and controllers can be represented as linear systems which are functions of a parameter, in this case airspeed. The LPV controllers are …
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Analysis of Fatal General Aviation Accidents Occurring from Loss of Control on Approach and Landing
… factor of "PILOT - Failure to maintain airspeed" across the three categories of reciprocating engine aircraft, turbine engine aircraft, and experimental-amateur built (E-AB) aircraft. The results also showed that 50% of all the accidents resulted from a pairing of "Pilot-Failure to …
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Aeroelastic modeling and flutter control in aircraft with low aspect ratio composite wings
… method of increasing the body-freedom flutter airspeed of an aircraft model. In addition, wing mounted piezoelectric sensor and induced-strain actuator patches were used in conjunction with active feedback control laws to increase the airspeed at which body-freedom flutter occurs. Two control …
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Fusion of sensor information to measure the total energy of an aircraft and provide information about flight performance and local microclimate
… cosine (DCM) based method. Altitude and airspeed data were fused by estimating potential and kinetic energy respectively; thus determining the aircraft's total energy. This data was then interpreted to locate thermal activity. The system comprised an Inertial Measurement Unit (IMU), …
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Pilot Performance and Eye Movement Activity with Varying Levels of Display Integration in a Synthetic Vision Cockpit
… display elicited better focus task performance (airspeed maintenance). The synthetic vision displays facilitated superior path maintenance performance under low workload, but these performance gains were not as evident during high workload.</p> <p>The majority of the eye movement findings …
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An aircraft and provide information about flight performance and local microclimate
… cosine (DCM) based method. Altitude and airspeed data were fused by estimating potential and kinetic energy respectively; thus determining the aircraft’s total energy. This data was then interpreted to locate thermal activity. The system comprised an Inertial Measurement Unit (IMU), …
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Effects of Musical Ability on Flight Planning, Situational Awareness, and Flight Path Deviations
… planning, situational awareness accuracy, and airspeed deviations. Additionally, participants who learned music before the age of 8 performed better on flight planning and airspeed deviations than those who learned after the age of 8. Further research may investigate the relationship between …
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Aerodynamic and Performance Analysis of a Morphing Helicopter Rotor System
… cases were applied as linear functions of airspeed. Linearly varying rotor speed provides the most benefits at higher airspeeds for individual morphing cases, while linearly varying twist with airspeed provided the most rotor drag reduction. For cases where two elements of morphing were …
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Aerodynamic Trade Study of Compound Helicopter Concepts
… of key attributes, including maximum attainable airspeed, flight efficiency (lift-to-drag ratio), along with the anticipated flight range and endurance. Parametric studies on the compound helicopter concepts were conducted to explore the relative advantages of adding a wing (including the effects …
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Fuel burn reduction potential from delayed deceleration approaches
… and severe weather conditions affecting the airspeed schedule of a given flight have been examined. Weather appeared to be a major parameter affecting the airspeed schedule, and air traffic procedures involving early decelerations appeared to have been used in dense and complex airspaces.
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Design and Performance of Circulation Control Geometries
… The flight conditions examined include two low airspeed cases with blown flaps at 60° and 90° of deflection, and a transonic cruise case with no blowing and 0° of flap deflection.</p> <p>Results showed that the shorter flaps of both flap configurations augmented greater lift for the low airspeed …
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Principles of Design for Complex Displays: A Comparative Evaluation
… of information grouping, orientation of the airspeed scale, and task type on response time (RT) and accuracy in a decision making task. Forty-eight college students viewed static displays of primary flight instruments and signaled responses to the displays by pressing keys on the computer …
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The Effects of Energy Beverages in Counteracting the Symptoms of Mild Hypoxia at Legal General Aviation Altitudes
… vertical deviations from the localizer, and airspeed deviations from the target speed of 100 knots. A repeated-measures ANOVA was carried out to determine effects of the beverages on the test variables. While results were non-significant, the researcher concluded that further research should …
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