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 20 for “"Handling Qualities"”.
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An analytical investigation of aircraft handling qualities
… it becomes necessary to predict the aircraft handling qualities. Previously, this has been done through the use of pilot opinion ratings of similar vehicles. However, it is desirable to develop more objective means of predicting handling qualities which also do not require the expensive flight …
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Prediction of Handling Qualities Deficiencies for Advanced Air Mobility Aircraft
… rotorcraft when it comes to configuration and handling qualities. Handling qualities for traditional airplanes and rotorcraft are often very predictable. All AAM concepts currently under development feature some sort of fly-by-wire flight control system. Regulatory agencies already have decades …
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Control for interfaces and handling qualities for space telerobotic vehicles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Reentry dynamics and handling qualities of a generic hypersonic vehicle
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1992.
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Dynamic Stability and Handling Qualities of Small Unmanned-Aerial-Vehicles UNMANNED-AERIAL-VEHICLES
… program for predicting the dynamic stability and handling qualities of small UAVs was created for use in the design stage of new small UAV concept development. This program was verified by inputting data for a Cessna-182, and by then comparing the program output with that of a similar program …
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A Simplified Icing Model for Simulation and Analysis of Dynamic Effects
… of ice accretions on aircraft performance, handling qualities, and pilot workload. Experimental wind tunnel data under icing conditions were used to develop regression models for the lift and drag coefficients. Linear variation with time in icing was considered for the degradation of …
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Development of a Remotely-Piloted Vehicle Platform to Support Implementation, Verification, and Validation of Pilot Control Systems
… and the use of a set of metrics for evaluating handling qualities with pilot in the loop configuration. The main objective of this study is to provide software and hardware tools to support performance evaluation of control systems designed to compensate for Pilot Induced Oscillations (PIOs). A …
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An analysis of the static and dynamic characteristics of a decoupled landing entry vehicle
… stability. To evaluate the lateral-directional handling qualities, a ω<sub>Θ</sub>/ω<sub>d</sub> coupling parameter along with the parameter abs(Θ/β) were derived to be applicable during hypersonic entry. Equations were also derived for determining the contribution of the stabilizing devices to …
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Characterization of Electrically Controlled Gel Polymer Electrolyte Monopropellants
… with higher performance and more attractive handling qualities than hydrazine. These monopropellants are employed using catalytic methods which lead to their decomposition and ignition. However, the development of compatible catalysts remains a limiting step in the technological readiness of …
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Retrofit systems for reconfiguration in civil aviation
… closed-loop frequency responses, and aircraft handling qualities. For all of the failure scenarios illustrated, the simulation results showed that the aircraft without reconfiguration departs; with reconfiguration, nominal performance is achieve provided that adequate control authority exists …
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Contributions to Ship-Airwake-Rotor Coupling Characterization Using Controlled Forcing
… ship airwake and the rotor wake, which degrades handling qualities and increases pilot workload, yet the underlying mechanisms governing ship-rotor coupling remain insufficiently understood. The ship-rotor aerodynamic coupling was examined using two canonical ship geometries, the NATO-GD and …
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Design of a Fan-Based Test Stand for Evaluating Multicopter Handling in Turbulent Flow
… to better understand how disturbances affect the handling qualities of both quadcopter drones and down-scale rotorcraft models as the wind gust can induce disturbances on the model. This report primarily focuses on the construction of the test stand and its independent capability to generate wind. …
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Evolution of Flying Qualities Analysis: Problems for a New Generation of Aircraft
… in the development and application of flying qualities criteria for modern aircraft are addressed in this dissertation. The history of flying qualities is traced from its origins to modern day techniques as applied to piloted aircraft. Included in this historical review is the case that was …
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Perception-based synthetic cueing for night-vision device rotorcraft hover operations
… analogue of a physical target used in a flight handling qualities tracking task, a perceptual task analysis for hover, and fundamentals of human spatial perception. The display was implemented on a simulation environment, constructed using a virtual reality device, an ultrasound head-tracker, …
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Aircraft Abnormal Conditions Detection, Identification, and Evaluation Using Innate and Adaptive Immune Systems Interaction
… the abnormal conditions on the performance and handling qualities are also proposed and investigated in this study.;The generality of the approach makes it applicable to any system. Data for artificial immune system development were collected from flight tests of a supersonic research aircraft …
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Inverse modelling and inverse simulation for system engineering and control applications
… fields of helicopter flight mechanics, aircraft handling qualities and associated issues in terms of model validation. However, the available methods still have some well-known limitations. The traditional methods based on the Newton-Raphson algorithm suffer from numerical problems such as …
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Wind and Wake Sensing with UAV Formation Flight: System Development and Flight Testing
… include gust suppression for improving handling qualities, a better warning system for high wind encounters, and enhanced control for small UAVs during flight. On the other hand, the existence of wind can be advantageous since it can lead to fuel savings and longer duration flights …
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Aircraft loss-of-control prevention via backup flight control law design and flight envelope protection
… that is designed to restore prescribed flying qualities for a family of uncertain aircraft models with similar vertical-tail damage. Simulation results with NASA's Transport Class Model demonstrate that the developed backup flight control law is able to recover directional control authority and …
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Performance, Stability and Control of Electric Short Takeoff and Landing Aircraft
… in the flight control system improved the pilot handling qualities ratings and achievable landing precision of the aircraft, with the greatest improvements arising from the use of the motors to augment the longitudinal stability based on airspeed feedback.
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Methods of system identification, parameter estimation and optimisation applied to problems of modelling and control in engineering and physiology
… developed initially by others for use in handling-qualities studies for fixed-wing aircraft and helicopters, are shown in the thesis to provide some important potential benefits in control applications compared with classical methods of inversion. New developments in terms of methodology …