不确定性切换非线性系统的自适应模糊控制

发布时间：2018-03-30 12:47

本文选题：切换非线性系统　切入点：自适应模糊控制　出处：《渤海大学》2017年硕士论文

【摘要】：近几年来,现代计算机技术的发展为切换系统的研究提供了强大的技术支持和广阔的发展前景。目前,切换非线性系统的自适应模糊控制已成为控制领域的一个热门研究课题,有着重要的理论与实际意义。本文针对两类不确定性切换非线性系统,结合反步法和自适应模糊控制技术,研究了相应的控制器的设计方法及闭环系统的稳定性问题。本文主要内容如下:1.研究了一类受约束不确定性切换非线性下三角时滞系统的自适应模糊输出追踪控制问题。在设计过程中,通过利用共同Lyapunov函数、反步递推技术以及障碍函数构造一个共同的状态反馈控制器。所提出的方法确保了闭环系统所有信号是有界的,并且在不违反约束下系统输出收敛到参考信号的一个小邻域内。2.研究了一类基于观测器的非严格反馈切换非线性时滞系统的自适应模糊控制问题。首先,通过设计一个切换的状态观测器来估计不可测的系统状态。然后,结合反步递推技术、Krasovskii泛函方法以及自适应模糊控制设计构造了所研究系统的一个输出反馈控制器。所提出的方法确保了闭环系统中所有的信号都是半全局最终一致有界的。虽然本文对不确定性切换非线性系统的自适应模糊控制问题做了一定的研究,但是许多有价值的问题有待进一步解决,例如通过设计状态依赖的切换信号处理切换非线性系统的自适应模糊控制问题、随机切换非严格非线性系统的自适应模糊控制问题以及工程应用等。
[Abstract]:In recent years, the development of modern computer technology has provided powerful technical support and broad prospect for the research of switched systems. At present, adaptive fuzzy control for switched nonlinear systems has become a hot research topic in the field of control. It has important theoretical and practical significance. In this paper, two kinds of uncertain switched nonlinear systems are combined with backstepping method and adaptive fuzzy control technology. The design method of the controller and the stability of the closed-loop system are studied. The main contents of this paper are as follows: 1. The adaptive fuzzy output tracking control for a class of constrained uncertain switched nonlinear systems with triangular time-delay is studied. In the design process, A common state feedback controller is constructed by using common Lyapunov function, backstepping recursive technique and obstacle function. The proposed method ensures that all the signals of the closed-loop system are bounded. Moreover, the output of the system converges to a small neighborhood of the reference signal without violating the constraints. The adaptive fuzzy control problem for a class of non-strict feedback switched nonlinear time-delay systems based on observers is studied. A switched state observer is designed to estimate the unmeasurable state of the system. Then, An output feedback controller for the studied system is constructed by combining the backstepping recursive technique with the Krasovskii functional method and the adaptive fuzzy control design. The proposed method ensures that all the signals in the closed-loop system are semi-global and final. Although the problem of adaptive fuzzy control for uncertain switched nonlinear systems is studied in this paper, However, many valuable problems need to be solved, such as adaptive fuzzy control for switched nonlinear systems by designing state-dependent switching signal processing. Adaptive fuzzy control problems and engineering applications for stochastic switched non-strictly nonlinear systems.
【学位授予单位】：渤海大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273.4

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