论文标题
非对称死区的非线性系统的自适应模糊滑动模式控制器及其应用于电湿系统
An adaptive fuzzy sliding mode controller for nonlinear systems with non-symmetric dead-zone and its application to an electro-hydraulic system
论文作者
论文摘要
死区是工业执行器中最常见的硬性非线性之一，其存在可能会严重损害控制系统的稳定性和性能。在这项工作中，提出了一个自适应变量结构控制器来处理受非对称死区输入的一类不确定的非线性系统。采用的方法主要基于滑动模式控制方法，但通过适应性模糊算法来增强以补偿死区。使用Lyapunov稳定理论和Barbalat的引理，可以在分析上证明闭环系统的收敛性能。为了说明控制器设计方法，介绍了所提出的方案在电湿度系统中的应用。通过数值模拟评估控制系统的性能。
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. In this work, an adaptive variable structure controller is proposed to deal with a class of uncertain nonlinear systems subject to a non-symmetric dead-zone input. The adopted approach is primarily based on the sliding mode control methodology but enhanced by an adaptive fuzzy algorithm to compensate the dead-zone. Using Lyapunov stability theory and Barbalat's lemma, the convergence properties of the closed-loop system are analytically proven. In order to illustrate the controller design methodology, an application of the proposed scheme to an electro-hydraulic system is introduced. The performance of the control system is evaluated by means of numerical simulations.
