具有极点约束的空天飞行器再入姿态的H∞模糊保性能控制

H∞Fuzzy Guaranteed Cost Control with Pole Constraints for Aerospace Vehicle's Re-entry Attitude

  • 摘要: 提出一种新的模糊鲁棒控制方法,并应用于空天飞行器(aerospace vehicle,ASV)再入段姿态的控制器设计.首先基于ASV再入姿态动态系统的T-S模糊模型,考虑外界干扰和系统的不确定性,考察了姿态角速率和姿态角的镇定问题,然后结合极点约束,导出了具有极点约束的H∞模糊保性能控制律存在的条件.最后设计了ASV再入姿态的模糊鲁棒控制器,应用Matlab的LMI(linear matrix inequality)和FLC(fuzzy logic contro1)工具可得出控制器的解.仿真结果验证了算法的有效性.

     

    Abstract: This paper proposes a new method of fuzzy robust control,which is used for the controller design of aerospace vehicle's(ASV)attitude during the re-entry phase.Firstly,based on the T-S fuzzy model of ASV re-entry attitude dynamic system,considering external disturbance and system uncertainties,the stabilization problem of angular rates and attitude angles is studied,then combining with pole constraints,an existence condition for H∞fuzzy guaranteed cost control law with pole constraints is derived.Finally,a fuzzy robust controller for ASV's re-entry attitude is designed,which can be solved by using LMIs(linear matrix inequalities)and FLC(fuzzy logic control)tools of Matlab.The simulation results demonstrate the effectiveness of the proposed method.

     

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