Observer-Based Adaptive Fuzzy Backstepping Output Feedback Control of Uncertain MIMO Pure-Feedback Nonlinear Systems

Observer-Based Adaptive Fuzzy Backstepping Output Feedback Control of Uncertain MIMO Pure-Feedback Nonlinear Systems
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不确定MIMO纯反馈非线性系统的基于观测器的自适应模糊反步输出反馈控制

DOI:
10.1109/tfuzz.2012.2183604
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发表时间:
2012-08
影响因子:
11.9
通讯作者:
Shi, Peng
Shi, Peng
中科院分区:
计算机科学1区
文献类型:
--
作者:
Tong, Shaocheng;Li, Yongming;Shi, Peng

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本文研究一类具有不可测状态的不确定多输入多输出(MIMO)纯反馈非线性系统的自适应模糊跟踪控制问题。动态输出反馈策略从状态观察器开始。模糊逻辑系统用于逼近未知的非线性函数。引入滤波信号来规避控制器实现中遇到的代数环问题,并通过反步递归设计技术获得自适应模糊输出反馈。结果表明,所提出的控制律可以保证所得到的闭环系统的所有信号都是半全局一致最终有界的,并且观察者和跟踪误差收敛到原点的一个小邻域。仿真研究旨在说明所提出技术的有效性和潜力。
This paper is concerned with the problem of adaptive fuzzy tracking control for a class of uncertain multiple-input-multiple-output (MIMO) pure-feedback nonlinear systems with immeasurable states. The dynamic output feedback strategy begins with a state observer. Fuzzy logic systems are utilized to approximate the unknown nonlinear functions. The filtered signals are introduced to circumvent algebraic loop problem encountered in the implementation of the controller, and an adaptive fuzzy output feedback is obtained via a backstepping recursive design technique. It is shown that the proposed control law can guarantee that all the signals of the resulting closed-loop system are semiglobally uniformly ultimately bounded and that the observer and tracking errors converge to a small neighborhood of the origin. Simulation studies are included to illustrate the effectiveness and potentials of the proposed techniques.
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