DEVELOPMENT OF CONTROL SCHEDULES TO MODIFY SPIN BEHAVIOUR

This paper describes a 'bifurcation tailoring' approach to the development of control laws designed to alter the dynamical system topology. In particular, it is shown how available control motivators may be scheduled so as to significantly alter the steep spin characteristics of an aircraft, thus eliminating conflict between the spin and a high incidence symmetric flight condition. The technique is seen to be particularly useful when nonlinearities result in a need for control sequences that are not necessarily intuitive. Bifurcation tailoring is shown to have application in modern fighter aircraft which operate to extreme angles of attack and which are equipped with multiple control devices.

[1]  Alan R. Champneys,et al.  Shil'nikov homoclinic dynamics and the escape from roll autorotation in an F–4 model , 1998, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[2]  Giulio Avanzini,et al.  Bifurcation Analysis of a Highly Augmented Aircraft Model , 1997 .

[3]  Mark H Lowenberg,et al.  Bifurcation analysis as a tool for post-departure stability enhancement , 1997 .

[4]  Raman K. Mehra,et al.  Bifurcation Analysis of Nonlinear Aircraft Dynamics , 1982 .

[5]  M. Lowenberg.  Bifurcation analysis of multiple–attractor flight dynamics , 1998, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[6]  C. C. Jahnke,et al.  Application of Bifurcation Theory to the High-Angle-of-Attack Dynamics of the F-14 , 1994 .

[7]  P. Guicheteau.  Stability analysis through bifurcation theory, 2 , 1993 .

[8]  Giulio Avanzini,et al.  Bifurcation Analysis of a Higly Augmented Aircraft Model , 1996 .

[9]  Mikhail Goman,et al.  Application of bifurcation methods to nonlinear flight dynamics problems , 1997 .

[10]  Wright-Patterson Afb,et al.  WING ROCK SUPPRESSION IN THE F-15 AIRCRAFT , 1997 .

[11]  C. Edward Lan,et al.  NONLINEAR ANALYSIS OF STABILITY AND CONTROL FOR AN F-16 CONFIGURATION , 1997 .

[12]  Mikhail Goman,et al.  Global Stability Analysis of Nonlinear Aircraft Dynamics , 1997 .

[13]  M. S. Francis,et al.  The X-31 aircraft: Advances in aircraft agility and performance , 1996 .

[14]  D. Littleboy,et al.  BIFURCATION ANALYSIS OF A HIGH INCIDENCE AIRCRAFT WITH NONLINEAR DYNAMIC INVERSION CONTROL , 1997 .

[15]  Y. Patel,et al.  Departure analysis of a twin-finned, high performance combat aircraft , 1996 .

[16]  Craig Charles Jahnke.  Application of Dynamical Systems Theory to Nonlinear Aircraft Dynamics , 1990 .