Recent events, such as the crash of NASA's Helios aircraft during a test flight, show that more must be known about the nonlinear control of HALE aircraft. Shearer, Cesnik and their co-workers have developed a code that is a practical solution to the coupled nonlinear aeroelasticity and flight dynamics of very flexible aircraft called the University of Michigan's Nonlinear Aeroelastic Simulation Toolbox (UM/NAST). They are also in the process of developing a model HALE aircraft called X-HALE which will be used to validate this code experimentally. This research performs flight simulations with UM/NAST so as to make predictions about X-HALE's future test flights and subsequently uncover the strengths and weaknesses of UM/NAST when X-HALE is finally flown. These simulations include simulations of straight and level flight and rolling flight. Rolling simulations involve periodic changes in the angle of the ailerons. Both the 6 meter and the 8 meter models of X-HALE are studied. Two control models are compared. These include the linear and non- linear models of UM/NAST.
Simulations for the Test Flight of an Experimental HALE Aircraft
2011
229 pages
Report
Keine Angabe
Englisch
Aircraft , Air Transportation , Military Intelligence , Communications networks , Flight simulation , Surveillance drones , Aeroelasticity , Endurance(General) , Nonlinear systems , Flexible structures , Mathematical models , Level flight , Ailerons , Flight testing , Coupling(Interaction) , High altitude , Hale aircraft , Hale(High altitude long endurance)
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