近空间高超声速飞行器输入饱和抑制模糊自适应控制

针对近空间高超声速飞行器三通道姿态跟踪控制问题，提出了一种基于输入饱和抑制的非线性模糊自适应滑模控制器。考虑到飞行器模型具有严格反馈形式的特点，以反步法为基础，结合非奇异快速Terminal滑模方法设计控制器。设计了模糊系统估计模型中的干扰项，并通过自适应鲁棒项补偿估计误差，引入非线性增益函数提高控制系统的饱和抑制能力，并基于Lyapunov理论证明了闭环系统的稳定性。最后，通过仿真对比实验验证方法的有效性。仿真结果表明，所设计的控制器能够保证飞行控制系统在存在模型参数不确定性的情况下具有良好的姿态跟踪性能和输入饱和抑制能力。

Fuzzy Adaptive Control for Near Space Hypersonic Vehicles with Saturation Restraint of Inputs

 According to the three-channel attitude tracking control problem of the near-space hypersonic vehicles, a nonlinear fuzzy adaptive sliding-mode controller based on the input saturation restraint is proposed. Considering the characteristic that the model of a flight vehicle has a strict-feedback form, the controller is designed based on the backstepping method combined with the nonsingular fast terminal sliding-mode control method. Two fuzzy systems are designed to estimate the disturbances of the model, and the estimative errors are compensated via the adaptive robust terms. The nonlinear gain function is adopted to improve the saturation restraint capability of the control system. The stability of the closed-loop system is proved based on the Lyapunov theory. Finally, the validity of the proposed method is verified via a simulation comparison experiment. The simulation results show that the proposed controller can guarantee good attitude tracking performance and input saturation restraint capability of the flight control system containing the uncertainties of the model parameters.