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The robust roll control using only synthetic jet actuators in high-angle-of-attack flight

By taking NACA0015 airfoil as an example, we study synthetic jets' effect on the aerodynamic performance, then propose the ideas and concrete methods of using synthetic jet to flight roll control at high angle of attack, which replaces the traditional aileron completely. According to the influence by the peak velocity, frequency, layout position, exit angles of synthetic jets and the angle of attack on lift, the optimal parameter combination was obtained. Based on the optimal parameter combination we provided a scheme that uses peak velocity of synthetic jet as the input. We also designed a synthetic jet controller for flight roll control at high angle of attack, which adopts the Robust LQR method to realize the stability control of roll (57.3 deg) at high angle of attack (18 deg). The simulation shows that the proposed control method has good control performance, and it overcomes the difficulty of using traditional aileron for flight roll control at high angle of attack.