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Adaptive fuzzy mixed H/sub 2//H/sub /spl infin// attitude control of spacecraft

机译:航天器的自适应模糊混合H / sub 2 // H / sub / spl infin //姿态控制

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This paper presents an adaptive fuzzy mixed H/sub 2//H/sub /spl infin// attitude control of nonlinear spacecraft systems with unknown or uncertain inertia matrix and external disturbances. Using an adaptive fuzzy approximation method, an uncertain nonlinear model is estimated. Then, by a mixed H/sub 2/ and H/sub /spl infin// attitude control design, the effect of external disturbance and fuzzy approximation error on spacecraft attitude can be restrained and the tracking error as well as consumed energy of the controller is minimized. By virtue of the skew symmetric property of the spacecraft system and adequate choice of state variable transformation, this adaptive fuzzy control problem can be reduced to solving two algebraic equations instead of a pair of coupled time-varying differential equations. Finally, experimental simulation results are presented to demonstrate the effectiveness of the proposed design methods.
机译:本文提出了具有未知或不确定惯性矩阵和外部干扰的非线性航天器系统的自适应模糊混合H / sub 2 // H / sub / spl infin //姿态控制。使用自适应模糊逼近方法,可以估算不确定的非线性模型。然后,通过混合H / sub 2 /和H / sub / spl infin //姿态控制设计,可以抑制外部干扰和模糊逼近误差对航天器姿态的影响,并且可以跟踪控制器的跟踪误差以及所消耗的能量被最小化。由于航天器系统的斜对称特性和状态变量变换的适当选择,该自适应模糊控制问题可以简化为求解两个代数方程,而不是一对耦合的时变微分方程。最后,通过实验仿真结果证明了所提出设计方法的有效性。

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