Adaptive actuator nonlinearity compensation and disturbance rejection with an aircraft application

In this paper, three adaptive control designs for systems with unknown dynamics and uncertain actuator nonlinearities and/or actuation disturbances are presented. First, an adaptive design utilizing an adaptive inverse is used to compensate for systems with actuator nonlinearities is developed. Then, an adaptive design to reject actuation disturbances is developed. Finally, an adaptive design is developed to compensate both actuator nonlinearities and actuation disturbances simultaneously. This adaptive control design is applied to an aircraft flight control system model with synthetic jet actuator nonlinearities and wind gust disturbances and simulation results are presented to show the desired adaptive system responses.