High angle of attack control system design based on ADRC and fuzzy logic

A missile autopilot design method based on active disturbance rejection control (ADRC) and fuzzy logic is proposed for agile turn of air-to-air missile with reaction-jet/aerodynamic blended control system. The scheme separates the missile pitching channel into angle of attack loop and pitching angular velocity loop. Controllers are designed by the ADRC respectively and combined to the whole control loop in tandem. Then a virtual control value is decided by the angle of attack command and allocated to aerodynamic deflectors and reaction jet control system. Finally, the feedback gains of the ADRC controller are adjusted in real time by fuzzy control. Simulation results indicate that the proposed strategy can track the high angle of attack command accurately, and it is applicable to finish agile turn at high angle of attack.