互联网环境下基于DMC算法的双闭环控制方法  

DMC-based Dual Closed-loops Control under Internet Environment

作　　者：李红艳[1] 王虹[1] 桂超[1] 

机构地区：[1]湖北经济学院计算机与电子科学系,湖北武汉430205

出　　处：《计算机应用研究》2006年第11期214-216,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60174043);湖北省教育厅重点科研项目(B200519001)

摘　　要：针对基于互联网的控制系统中,网络数据传输存在不确定性时延而难以实现闭环实时控制的问题,提出一种基于DMC算法的双闭环控制方法。结合双采样率思想,高频率采样的本地闭环控制回路实现本地控制功能;而低频率采样的远程闭环控制回路则完成全球控制功能。利用DMC算法实现前向和反馈端互联网时延的在线补偿。仿真结果表明采用DMC算法补偿时延的双采样率控制方法能够有效地克服互联网时延对控制系统动态性能的影响。Closed-loop real-time control over Internet is very difficult because of the uncertain Internet time-delay influencing the dynamic performance of control systems during Internet transmission. A dual closed-loops control strategy based on DMC is proposed to deal with these problems. Combining with dual-rate sampling ideal, the local closed-loop controller is running at a higher frequency to stabilize the plant and the remote controller at a lower frequency implements the global control function. Two time-delay compensators based on Dynamic Matrix Controller（ DMC ） are designed to compensate Interuet time delay in the feed-forward and feedback channels, The simulation results show the efficiency of the new control method for overcoming the Internet time-delay.

关 键 词：控制系统 互联网 时延 DMC 预测控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]