具有丢包的异采样率双环网络控制系统  

Double-loop network control system in different sampling periods and data packet dropout

作　　者：梁澄河 刘电霆[1] 

机构地区：[1]桂林理工大学机械与控制工程学院,广西桂林541004

出　　处：《桂林理工大学学报》2015年第1期207-212,共6页Journal of Guilin University of Technology

基　　金：广西高校优秀人才项目(桂教人[2009]62);广西汽车零部件与整车技术重点实验室项目(2013KFMS03);广西高校重点科研项目(201202ZD048);广西研究生教育创新计划项目(YCSZ2014153)

摘　　要：研究了一类存在数据包丢失的异采样率双环网络控制系统。该系统由内控制环和外控制环组成,内、外控制环的采样周期不同,且由于网络的存在,传输过程会出现数据包丢失问题。采用提升技术将内环扩展成多采样周期模型来解决内环和外环统一建模的问题,利用马尔可夫链来描述数据包丢失情况,并建立综合系统模型。基于李雅普诺夫方法,给出了网络控制系统随机稳定的充分条件,提出控制器的设计方法,并通过数值算例验证了方法的有效性。A class of multi-rate double-loop network control system is studied.The system is composed of inner-loop and outer-loop with different sampling periods and packet loss.In the paper,the inner loop was extended to multi-sampling cycle model by lifting technology to solve the problem of unified modeling of the inner-loop and outer-loop.Then Markov chain is used to describe the packet loss process by lifting technology.Based on the method of Lyapunov,sufficient conditions for stochastic stability of network control systems are given.The controller design method is discussed.Finally,numerical examples are studied to verify the effectiveness of the proposed method.

关 键 词：网络控制系统 异采样率 马尔可夫链 数据包丢失 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]