A model reference robust control and its application to autopilot control law design

In this paper, a new model reference robust control (MRRC) scheme is proposed and is applied to autopilot control law design. By using our scheme, both the tracking performance and the control effort can be improved significantly. The simulation results of a pitch-attitude-hold autopilot design show that, even with the existence of plant uncertainty, nonlinear disturbance and unmodeled dynamics, the steady-state error of the step response is no more than 0.3 percent of the final value and, the amplitude of the control signal is only about 35 percent of that by using the traditional zero-pole placement control scheme.