Title page for ETD etd-03242009-040703
|Type of Document
||Control authority assessment in aircraft conceptual design
||Master of Science
|Mason, William H.
|Durham, Wayne C.
|Lutze, Frederick H. Jr.
|Date of Defense
All aircraft must meet controllability
requirements to be
certified for commercial use or adopted by the mi1itary.
Aircraft maneuverability is often 1imited by control
authority. Thus, it is essential for designers to evaluate a
candidate concept's control authority early in the conceptual
design phase. In this thesis, a methodology for rapid control
power evaluation of preliminary design configurations against
requirements at the key flight conditions is established.
First, a collection of critical flight conditions to be
considered using this methodology is identified. To examine
a variety of aircraft configurations and accelerate the
process of estimating stability and control derivatives, a
FORTRAN program using the Vortex-Lattice Method was written to
estimate subsonic, low angle-of-attack aerodynamics. Then, a
spreadsheet processes the aerodynamic data to check whether
the design configuration possesses adequate control power to
satisfy the requirements of the critical flight conditions.
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