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针对高超声速飞行器输出跟踪问题,提出了一种基于观测器的分层模糊自适应鲁棒控制器的设计方法。本文设计了一种基于分层模糊系统的间接自适应控制器,减少在线辨识参数的数量;同时设计非线性干扰观测器(NDO)对系统复合干扰进行估计补偿;最后引入鲁棒补偿控制项,克服传统非线性干扰观测器的限制条件,并利用Lyapunov理论证明了整个系统的稳定性。仿真结果表明,该方法不仅能够保证高超声速飞行器具有良好跟踪性能,而且具有很强的鲁棒性。
Aiming at the output tracking problem of hypersonic vehicle, a design method of observer-based hierarchical fuzzy adaptive robust controller is proposed. In this paper, an indirect adaptive controller based on hierarchical fuzzy system is designed to reduce the number of on-line identification parameters. At the same time, a non-linear disturbance observer (NDO) is designed to estimate the system complex interference. Finally, robust compensation control is introduced, Overcomes the limitation of traditional nonlinear disturbance observer, and uses Lyapunov theory to prove the stability of the whole system. The simulation results show that the proposed method can not only ensure the good tracking performance of the hypersonic vehicle, but also have strong robustness.