Nonlinear Dynamic Inversion Based Anti-windup - An Aerospace Application

A recently suggested general anti-windup (AW) compensation scheme is applied to the nonlinear simulation model of the 1/16 scaled BAe Hawk aircraft model used for wind tunnel experiments. The Hawk is modelled as a nonlinear affine system subject to input constraints and has a primary control system consisting of an inner-loop nonlinear dynamic inversion controller and an outer-loop linear PID controller. To address the input constraints a recently introduced nonlinear L2 sub-optimal AW compensation method is applied and compared with a nonlinear version of the internal model control AW scheme. Nonlinear simulation results demonstrate the promise of the approach and indicate the superiority of the optimal AW scheme.