Adaptive Actuator Nonlinearity Compensation and Disturbance Rejection Applied to Aircraft Models with Synthetic Jet Actuators

An adaptive approach is developed to simultaneously compensate for actuator nonlinearites and reject actuation disturbances. An adaptive inverse is used to cancel the eect of an actuator nonlinearity with unknown parameters. An adaptive disturbance rejection signal is added to cancel the eect of constant and nonconstant actuation disturbances. A feedback control law is used to control the dynamics of the system. This approach is applied to an aircraft ight control system model. Four types of linear time-invariant systems are studied: the nominal system (with neither actuator nonlinearities nor actuation disturbances), systems with actuator nonlinearities, systems with actuation disturbances, and systems with both actuator nonlinearities and actuation disturbances.