高超声速飞行器有限时间耦合模糊控制

针对高超声速飞行器的角度与角速度子系统间的耦合控制问题，提出了一种基于耦合特性评价的有限时间模糊控制方案。首先，针对高超声速飞行器的动力学模型，并且考虑到与工程实际相结合，将舵系统引入到动力学模型中，建立了相对完善的动力学模型，通过引入期望指令，建立了面向控制的动力学误差模型。其次，在控制律设计上采用终端滑模设计了有限时间控制器，同时在耦合评价的基础上，为了解决系统对耦合的适应性以及耦合的抖振问题采用了模糊控制方法，并借助于干扰观测器解决外部干扰问题。采用李雅普诺夫稳定性理论证明了所设计的控制律是有限时间稳定性的。在数字仿真过程中，充分考虑了舵系统特性、气动拉偏、控制输入抖动等因素，仿真结果表明该方法是有效的。

Fuzzy control of finite time attitude coupling in hypersonic vehicles

Aiming at the attitude-coupling control problem of hypersonic vehicles, this paper proposes a limited time fuzzy control scheme based on attitude coupling characteristics. A rudder system is first introduced into the attitude dynamic model of hypersonic vehicles with consideration of the engineering reality, thereby establishing a relatively perfect attitude dynamic model. By introducing the desired attitude tracking instructions, a control-oriented attitude error model is established. Secondly, a finite-time controller is designed using the terminal sliding mode as a whole. Meanwhile, based on the coupling evaluation, a fuzzy control method is adopted to solve the system adaptability to the coupling and the chattering of the coupling. To solve external disturbances, a disturbance observer is used, followed by verification of the system stability based on the Lyapunov stability theory. Finally, considering the characteristics of the rudder system, aerodynamic deflection, and control chattering in the process, the simulation proves the effectiveness of the method.