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首页> 外文期刊>Journal of the Brazilian Society of Mechanical Sciences and Engineering >An adaptive fuzzy dead-zone compensation scheme and its application to electro-hydraulic systems
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An adaptive fuzzy dead-zone compensation scheme and its application to electro-hydraulic systems

机译：自适应模糊死区补偿方案及其在电液系统中的应用

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摘要

The dead-zone is one of the most common hard nonlinearities in industrial actuators and its presence may drastically compromise control systems stability and performance. Due to the possibility to express specialist knowledge in an algorithmic manner, fuzzy logic has been largely employed in the last decades to both control and identification of uncertain dynamical systems. In spite of the simplicity of this heuristic approach, in some situations a more rigorous mathematical treatment of the problem is required. In this work, an adaptive fuzzy controller is proposed for nonlinear systems subject to dead-zone input. The boundedness of all closed-loop signals and the convergence properties of the tracking error are proven using Lyapunov stability theory and Barbalat's lemma. An application of this adaptive fuzzy scheme to an electro-hydraulic servo-system is introduced to illustrate the controller design method. Numerical results are also presented in order to demonstrate the control system performance.
机译：死区是工业执行器中最常见的硬非线性之一，它的存在可能会严重损害控制系统的稳定性和性能。由于以算法的方式表达专业知识的可能性，在过去的几十年中，模糊逻辑已被广泛用于控制和识别不确定的动力学系统。尽管这种启发式方法很简单，但在某些情况下，仍需要对问题进行更严格的数学处理。在这项工作中，提出了一种适用于受死区输入影响的非线性系统的自适应模糊控制器。利用Lyapunov稳定性理论和Barbalat引理证明了所有闭环信号的有界性和跟踪误差的收敛性质。介绍了该自适应模糊方案在电液伺服系统中的应用，以说明控制器的设计方法。还给出了数值结果，以证明控制系统的性能。

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