摘要
飞行器姿态系统具有非线性、强耦合、多输入多输出 ( MIMO)的特点。本文针对飞行器姿态模型的非线性和不确定性 ,提出鲁棒自适应模糊解耦控制方法 ,对飞行姿态进行机动控制。首先 ,设计基于精确反馈线性化的模糊解耦控制环节。针对模糊逼近所带来的误差以及外部干扰项 ,采用 H∞ 鲁棒补偿控制方法 ,使误差干扰项对系统的影响最小。为充分利用有限的模糊规则 ,采用非线性可调参数模糊模型。模糊参数的自适应调节律由李雅普诺夫综合法得到。数学仿真表明 。
The characteristic of aerocraft attitude system is nonlinearity,strong coupling and MIMO.Based on the exact feedback linearization technique,a kind of robust adaptive fuzzy decoupling control approach for the aerocraft attitude uncertain system with unknown external disturbance was proposed in this paper.At first,the fuzzy adaptive control scheme was designed to achieve the decoupling control of MIMO nonlinear system.Next,H∞ robust compensatory controller was present to attenuate the influence of inherent approximation error and unknown external disturbance.A kind of fuzzy model with nonlinear adjustable parameter was employed to approximate uncertrainties,and the model administered to reducing the number of the fuzzy rules.The adaptive law of parameters in fuzzy model was constructed by Lyapunov synthesize method.The simulation result of the system demonstrated the availability of the proposed method.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2003年第4期368-373,共6页
Journal of Astronautics
基金
国家自然科学基金资助项目 (60 2 740 0 2 )
