Abstract: new variable structure model referenee adaptive control method is proposed for bank-to-turn (BTT)missiles’roll channel autopilot designs.The method is completely based on the maximums and the minimums of plant’s parameter variations and random disturbances,and avoids utilizing on-line parameter identification and on-line random disturbance estimation,which improves the adaptivity and robustness of control systems.With many non-ideal factors taken into account,satisfactory digital simulation results are presented.

Key words: Key words automaticvariations-structure analysis, model reference adaptive control, turning flight, pilots