Abstract: This paper presents an adaptive compensation method for the phase lag and amplitude distortion of the rudder system of a spinning missile in the course of deflection. This paper introduces the control principle of the rotary missile, then the mechanism of the equivalent force distortion is analyzed and the problems that the traditional compensation method encounters in engineering practice are explained. Secondly, this paper designs an adaptive compensation method which is not based on an exact model. This method uses the deviation of the input signal and the output signal to form the closed-loop feedback, and compensates the equivalent force with an appropriate algorithm. Finally, the validity of this method is verified by means of the digital simulation comparison.

Key words: Spinning missile, Equivalent force, Self-adaption, Compensation, Decoupling