Missile Autopilot Designs Using H8 Control with Gain Scheduling and Dynamic Inversion

Abstract

Twononlinearcontrollerdesignsarepresentedforabank-to-turn,air-to-airmissile.Thee rstcontrollerisagainscheduled H1 design, and the second is a nonlinear dynamic inversion design using a two-timescale separation. We carried out a number of time- and frequency-domain analysis procedures on the resulting designs and tested their performance on a nonlinear simulation of the missile. We compared the controller designs for nominal performance, robustness to uncertainties in the aerodynamic coefe cients, and sensitivity to measurement noise. The dynamic inversion controller was found to be signie cantly less robust to aerodynamic uncertainty. Using a π-analysis test on a linearization of the closed-loop dynamics with the dynamic inversion controller, we were able to e nd a destabilizing aerodynamic uncertainty for the full nonlinear system.