基于切换原理的非均匀采样系统输出反馈控制  

Output Feedback Control of Non-Uniformly Sampled Systems Based on Switching Principle

作　　者：王宏伟[1,2] 连捷 WANG Hong-wei;LIAN Jie(School of Control Science and Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;School of Electrical Engineering,Xinjiang University,Urumqi,Xinjiang 830047,China)

机构地区：[1]大连理工大学控制科学与工程学院,辽宁大连116024 [2]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《电子学报》2020年第1期28-34,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61004040,No.61683034)

摘　　要：在非均匀采样系统中,存在着刷新时间间隔不确定和时变的情况,这给系统控制器的设计造成了很大困难.针对此问题,本文将刷新时间间隔看作时延变量,将不同时延的系统动态变化过程转化为不同子系统的动态变化过程,从而将时延的变化转化为不同子模型之间的切换,最终将非均匀采样系统描述为一类具有有限个子系统的离散时间切换系统.利用输出反馈控制方法,基于平均驻留时间条件,使输出反馈闭环非均匀采样系统指数稳定.最后,通过一个非均匀采样系统仿真实例证明了提出方法的有效性.In the non-uniformly sampled systems,there are uncertainties and time-varying of the refresh time interval,which have caused great difficulties to design the system controller.To aim at these problems,the refresh time interval is regarded as the time delay variable,and the system dynamic changing processes in different time delays are characterized by the changing processes of different subsystems.The variety of different time delays is transformed into the switching between different sub-models.The non-uniformly sampled system is described as a class of discrete-time switched systems with finite subsystems.Under the condition of satisfying the average dwell time,the output feedback control method is used to guarantee the exponential stability of the closed loop non-uniformly sampled system.Finally,the effectiveness of the proposed method is demonstrated by the example of the non-uniformly sampled system.

关 键 词：切换系统 非均匀采样 指数稳定 多采样率系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]