A Singular Perturbation-like Method to Compensate the Effect of Fin-Actuator Dynamics in Nonlinear Missile Control

The recently developed autopilot controller can make the input-output (I/O) dynamic characteristics of the nonlinear missile dynamics linear and independent of flight conditions. However, significant fin-actuator dynamics can degenerate the I/O dynamics performance of the overall system. In this paper, we propose a singular perturbation-like method to compensate the effect of significant fin-actuator dynamics in nonlinear missile control. The proposed compensation method does not require the time derivatives of fin angles but can maintain the linear I/O dynamic characteristics provided by the recently developed autopilot controller