论文部分内容阅读
研究多输入–多输出(MIMO)高阶非仿射非线性系统的特征建模问题.首先证明了MIMO高阶非仿射非线性系统的特征模型可用二阶时变差分方程组描述,并给出了特征模型的建模误差.然后设计了基于特征模型的自适应模糊广义预测控制器,利用Lyapunov方法分析了闭环系统的稳定性.由于控制结构中使用了分层模糊逻辑系统,从而极大减少了模糊规则和可调参数的个数,提高了控制的实时性.通过对挠性卫星姿态控制的仿真研究验证了所给控制方案的有效性,可实现高精度的姿态控制,且该方法具有较强的鲁棒性.
This paper studies the characteristic modeling problem of MIMO higher order non-affine nonlinear systems.Firstly, it is proved that the characteristic model of MIMO higher order non-affine nonlinear systems can be described by second-order time-varying difference equations, The modeling errors of eigenmodel are presented.And then an adaptive fuzzy generalized predictive controller based on eigenmodel is designed and the stability of the closed-loop system is analyzed by Lyapunov method.As a result of the hierarchical fuzzy logic system used in the control structure, The number of fuzzy rules and adjustable parameters is reduced, and the real-time performance of the control is improved.Through the simulation study of the attitude control of flexible satellite, the effectiveness of the proposed control scheme is verified and the attitude control with high accuracy can be realized. Has strong robustness.