超机动飞机边界保护控制器设计

Design of envelope protection controller for supermaneuverable aircraft

针对超机动飞机过失速机动的飞行安全问题,提出了一种飞行边界保护控制方法。首先采用动态逆控制方法解决了超机动飞机模型中的非线性和耦合性问题,然后通过求解超机动飞机的动态配平点的可达集,来确定飞机在任意飞行状态下的安全飞行边界,最后将所获得的动态边界集成到动态逆控制器中来约束飞机的机动范围,以降低超机动飞机完成过失速机动时的失控风险。仿真结果表明,所设计的飞行边界保护控制器能够改善超机动飞机过失速机动飞行时的指令跟踪效果,更好地完成Cobra等过失速机动动作,提高了飞行的安全性。

This paper focuses on the problem of flight safety for supermaneuverable aircraft. A novel control method is proposed to achieve the objective of envelope protection. Firstly,a kind of dynamic inverse controller is designed to deal with the nonlinear model of aircraft. Next,the dynamic envelope of the aircraft in flight can be obtained in real time by calculating the attainable equilibrium sets. Finally,the dynamic envelope is worked as a kind of safe boundary in the previous designed controller to reduce the loss-of-control risk of supermaneuverable aircraft. Simulation results show that the proposed method has a satisfying control effect in post stall maneuver.