Jahnke, C. C. and Culick, F. E. C. (1994) Application of Bifurcation Theory to the High-Angle-of-Attack Dynamics of the F-14. Journal of Aircraft, 31 (1). pp. 26-34. ISSN 0021-8669 . http://resolver.caltech.edu/CaltechAUTHORS:20101123-102858346
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Bifurcation theory has been used to study Ihe nonlinear dynamics of the F-14. An 8 degree-of-freedom model that does not include the control system present in operational F-14's has been analyzed. The aerodynamic model, supplied by NASA, includes nonlinearlties as functions of the angles of attack and sideslip, the rotation rate about the velocity vector, and the elevator deflection. A continuation method has been used to calculate the steady states of the F -14 as continuous functions of the elevator deflection. Bifurcations of these steady states have been used to predict the onset of wing rock, spiral divergence, and jump phenomena that cause the aircraft to enter a spin. A simple feedback control system was designed to eliminate the wing rock and spiral divergence instabilities. The predictions were verified with numerical simulations.
|Additional Information:||© 1992 by the American Institute of Aeronautics and Astronautics, Inc. Received Feb. 12, 1992; revision received Oct. 6, 1992; accepted for publication Oct. 7, 1992. This work was partly supported by CALTECH funds and partly supported by Grant NCCZ-429 from NASA Ames Dryden Flight Research Center. The F-14 aerodynamic model was supplied by Joe Gera, Acting Assistant Branch Chief, Vehicle Technical Branch, NASA Ames Dryden Flight Research Center.|
|Group:||Guggenheim Jet Propulsion Center|
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|Official Citation:||Application of bifurcation theory to the high-angle-of-attack dynamics of the F-14 pages 26-34 Jahnke, C. C. (Clarkson Univ., Potsdam, NY);Culick, F. E. C. (California Inst. of Technology, Pasadena) Journal of Aircraft (0021-8669) 1994 vol. 31 no. 1|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||24 Nov 2010 19:34|
|Last Modified:||26 Dec 2012 12:40|
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