In this paper, an automatic gain control scheme is first proposed and
used in the rolling channel for coping with aerodynamic coupling from
pitching or yawing channel of a supersonic flight vehicle. The considered
airframe is a rolling stabilized system with skid-to-turn maneuver. It always needs complicated gain adaptive logic for stable and unstable aerodynamic couplings. The effect of coupling is equivalent to the loop gain changing.Therefore, automatic gain control can be used to adjust the rolling loop gain automatically. It needs not conventional complicated gain scheduling technique. The overall system with the proposed scheme is equivalent to a conventional automatic gain control loop with command tracking error input. Therefore, it gives good command tracking behavior while keeping robust characteristic of the original AGC loop. 6DOF simulations with large aerodynamic couplings are made and give same conclusion.