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Output feedback stabilization of uncertain fuzzy systems using variable structure system approach

机译:变结构系统方法的不确定模糊系统输出反馈镇定

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摘要

Based on the variable structure system theory, an output feedback fuzzy control design method is developed for a class of uncertain nonlinear systems that can be represented by a T-S (Takagi-Sugeno) fuzzy model. The uncertain fuzzy systems under consideration may have mismatched uncertainties in the state matrix. As the local controller a compensator-based sliding mode output feedback controller with a nonlinear discontinuous term is used. In terms of linear matrix inequalities (LMIs), a sufficient condition is derived for the existence of the fuzzy controller guaranteeing a stable sliding motion. It is shown that the compensator gain and the switching surface parameter matrix can be characterized in terms of the solution of the LMI existence condition. Finally, an LMI-based design algorithm and numerical design examples are given.
机译:基于变结构系统理论,为一类不确定的非线性系统开发了一种输出反馈模糊控制设计方法,该系统可以用T-S(Takagi-Sugeno)模糊模型表示。正在考虑的不确定模糊系统在状态矩阵中可能具有不匹配的不确定性。作为本地控制器,使用具有非线性不连续项的基于补偿器的滑模输出反馈控制器。就线性矩阵不等式(LMI)而言,为保证稳定滑动运动的模糊控制器的存在导出了充分条件。结果表明,可以根据LMI存在条件的解来表征补偿器增益和开关表面参数矩阵。最后,给出了基于LMI的设计算法和数值设计实例。

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