执行器受限下离散网络控制系统容错控制
2023,31(4):110-116
摘要：随着自动控制、计算机科学以及通讯技术等飞速发展,近十年来网络控制系统(NCSs)已经在工业控制、航空航天以及物联网等领域得到广泛的应用。针对离散时间网络控制系统存在执行器饱和与故障的情况,充分考虑网络诱导时延和参数不确定等影响,提出了一种容错控制设计方法,将被控系统转化为一类存在扇形有界不确定性和非线性项的闭环控制系统,利用Lyapunov稳定性理论和时延上界信息进行泛函构造并利用Jenson不等式放大技术估计泛函差分更紧上界,得到确保闭环系统渐近稳定的充分性条件,再基于线性矩阵不等式(LMI)技术得到控制器增益设计方案,最后利用对比仿真验证了方法的有效性并且能降低保守性。
关键词：网络控制系统;执行器饱和;网络诱导时延;容错控制;线性矩阵不等式
Fault Tolerant Control for Discrete Networked Control Systems with Actuator Constraints
Abstract：Together with the rapid developments of automation control, computer science, and communication technology, networked control systems (NCSs) have been widely applied in many fields such as industrial control, aeronautics and astronautics, and Internet of things. Firstly, aiming at the discrete NCSs with actuator saturation and faults, a fault tolerant controller is designed by considering the network-induced delay and parameter uncertainty; secondly, by using Lyapunov stability theory and the information of upper bound of delay, a kind of functional is constructed and more tightly upper bound is obtained by utilizing Jenson inequality technique; thirdly, some asymptotical criteria are obtained and controller gain can be solved in the frame of LMI(linear matrix inequality) forms; finally, the simulations show the effectiveness and less conservativeness of the proposed method.
Key words：networked control systems; actuator saturation; networked-induced delay; fault tolerant control; LMI(linear matrix inequality)
收稿日期：2022-08-05
基金项目：国家自然科学基金(62003233)；山西省应用基础研究计划(201901D211083)；南京邮电大学引进人才自然科学研究启动基金(NY221134)
