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针对高超声速飞行器的6自由度再入模型,在考虑模型不确定和外界干扰的情况下,提出了一种新型鲁棒控制策略.首先,针对飞行器再入姿态模型设计了一种基于反步的超螺旋滑模控制器,并分析了闭环系统的有限时间稳定性.在此基础上,构建了一套高超声速飞行器再入控制方法的性能指标体系,进而提出了一种基于层次分析(AHP)法和熵值法结合的定量性能评估方法.最后,通过Matlab仿真与性能评估验证了所提控制策略具有良好的控制性能和鲁棒性.
Aiming at the 6-DOF reentry model of hypersonic vehicle, a new type of robust control strategy is proposed considering the uncertainty of the model and external disturbance.At first, a method based on backstepping And the finite-time stability of the closed-loop system is analyzed. Based on this, a set of performance index system for the reentry control of the hypersonic vehicle is constructed, and then a hierarchical AHP (Analytic Hierarchy Process) Method and entropy method.Finally, the simulation and performance evaluation of Matlab prove that the proposed control strategy has good control performance and robustness.