基于改进型JGPC的网络系统随机时延补偿  

Delay Compensation of Network Control Systems Based on JGPC

作　　者：刘艳红[1] 罗永平[1] 刘言兴 

机构地区：[1]郑州大学电气工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2014年第1期30-33,38,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(60974005);教育部博士学科点基金项目(20094101120008);河南省基础与前沿技术研究计划项目(092300410201)

摘　　要：针对网络控制系统中普遍存在的随机时延和数据丢包等会导致系统的控制性能下降甚至不稳定的问题,采用一种新的时延补偿控制算法.首先建立了网络时延的自回归模型并采用最小均方算法对随机时延进行在线预估,然后采用一种新的改进型的JGPC控制算法对网络时延进行补偿.采用该算法较GPC具有好的实时性、系统鲁棒性和稳定性.仿真实验结果表明,该方法能很好地对网络时延进行补偿,能够得到满意的控制效果.The uncertain factors such as the network delays usually deteriorate the control performance and sta bility of networked control systems （NCS） ,even result in instability. In this paper, we propose a novel delay compensation method to enhance the stability of NCS. First, an auto regressive model for the network time de lays is established and the parameter self tuning LMS （ Least mean square） algorithm is used to predict the net work delay online. Then, a improved JGPC algorithm is proposed for the compensation of the networked time de lay. This algorithm can get a better system performance than GPC. Simulation results show that the proposed method can effectively compensate the network delay and improve the dynamic performance of the NCS.

关 键 词：网络化控制系统 自回归模型 JGPC算法 随机时延预测 时延补偿 

分 类 号：TM743[电气工程—电力系统及自动化]