Dynamic gain scheduled control of an F16 model

This paper shows the theoretical development and application of dynamic gain scheduled control to an aircraft model. The idea behind this method is to schedule the control law gains with a fast varying state variable rather than with a slow varying state or an input parameter. This type of gain scheduling is shown to improve the transient response of the aircraft model when stepping between trim conditions and to overcome some of the problems associated with conventional gain scheduled controllers. ‘Hidden coupling terms’ that introduce unwanted dynamics when scheduling gains with a fast state are, under specific conditions, eliminated directly by applying a transformation to the classical parameterscheduled gain distributions which are calculated using eigenstructure assignment. Whilst dynamic gain scheduling has previously been implemented on aircraft models, the study discussed in this paper seeks to address practical application issues on more complex wideenvelope nonlinear aircraft models; a mathematical model of an F16 aircraft has been selected for this purpose.

[1]  E.Y. Shapiro,et al.  Eigenstructure Assignment for Linear Systems , 1983, IEEE Transactions on Aerospace and Electronic Systems.

[2]  Mark H Lowenberg,et al.  A continuation design framework for nonlinear flight control problems , 2006 .

[3]  Mark H Lowenberg,et al.  Tailored dynamic gain-scheduled control of a nonlinear UCAV model , 2005 .

[4]  John Hodgkinson,et al.  Aircraft Handling Qualities , 1999 .

[5]  Wilson J. Rugh,et al.  Research on gain scheduling , 2000, Autom..

[6]  Mark B. Tischler,et al.  OPTIMIZATION AND COMPARISON OF ALTERNATIVE FLIGHT CONTROL SYSTEM DESIGN METHODS USING A COMMON SET OF HANDLING-QUALITIES CRITERIA , 2001 .

[7]  Mark H Lowenberg,et al.  Control of nonlinear aircraft models using dynamic state-feedback gain scheduling , 2003 .

[8]  Thomas F. Fairgrieve,et al.  AUTO 2000 : CONTINUATION AND BIFURCATION SOFTWARE FOR ORDINARY DIFFERENTIAL EQUATIONS (with HomCont) , 1997 .

[9]  Mark H Lowenberg,et al.  Dynamic gain-scheduled control of the ICE 101-TV , 2005 .

[10]  Mark H Lowenberg,et al.  Dynamic gain scheduled control of a Hawk scale model , 2007 .

[11]  P. L. Deal,et al.  Simulator study of stall/post-stall characteristics of a fighter airplane with relaxed longitudinal static stability. [F-16] , 1979 .

[12]  Martin Hanel,et al.  Realization of the Eurofighter 2000 Primary Lateral/Directional Flight Control Laws with Differential PI- Algorithm , 2004 .

[13]  Mark H Lowenberg,et al.  Tailored Dynamic Gain-Scheduled Control , 2006 .