In this paper, the problem of adaptive fuzzy proportional-integral output feedback tracking control is investigated for a class of uncertain switched nonlinear systems with dead-zone output, unknown control coefficients, and unmodeled dynamics. The unknown parameter of the dead-zone output is processed using adaptive estimation technique. A set of switched filters are developed to estimate unmeasurable states. Then, by combining fuzzy logic systems and backstepping technique, an adaptive output feedback PI tracking controller is developed, which has intuitive structure and a strong physical meaning. Finally, the boundedness of the tracking error and all signals in the closed-loop system is demonstrated via a multiple Lyapunov function. The effectiveness of the proposed scheme is confirmed through two examples.

在本文中，针对一类具有死区输出、未知控制系数和未建模动力学的不确定切换非线性系统，研究了自适应模糊比例积分输出反馈跟踪控制问题。使用自适应估计技术处理死区输出的未知参数。开发了一组开关滤波器来估计不可测量的状态。然后，结合模糊逻辑系统和反推技术，开发了一种结构直观、物理意义强的自适应输出反馈PI跟踪控制器。最后，通过多重李雅普诺夫函数证明了闭环系统中跟踪误差和所有信号的有界性。通过两个例子证实了所提出方案的有效性。