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

作　　者：王玉惠[1] 吴庆宪[1] 姜长生[1] 黄国勇[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016

出　　处：《信息与控制》2008年第3期298-304,共7页Information and Control

基　　金：国家自然科学基金(90405011);南京航空航天大学博士创新与创优基金(BCXJ06-06)

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.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.

关 键 词：空天飞行器 T-S模糊模型 极点约束 保性能 H∞指标 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程] V249[自动化与计算机技术—控制科学与工程]