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浙江大学学报(工学版)
J4  2012, Vol. 46 Issue (2): 194-198    DOI: 10.3785/j.issn.1008-973X.2012.02.002
电气工程     
基于神经网络延时预测的自适应网络控制系统
于晓明, 蒋静坪
浙江大学 电气工程学院,浙江 杭州 310027
Adaptive networked control system based on delay prediction
using neural network
YU Xiao-ming, JIANG Jing-ping
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
 全文: PDF 
摘要：

针对网络控制系统存在着随机、时变、不确定的信息传输延时,采用带有时间戳的线性神经网络（TSLNN)进行在线延时预测,实时地获得当前采样周期的网络传输延时预测值.该方法选取3个先验的网络实测延时值作为神经网络的输入样本,选用widrow-hoff学习规则作为神经网络的训练算法；应用网络传输延时预测值,并采用一阶Pade方法,对数学模型中的延时环节进行线性化处理,从而获得无刷直流电机调速网络控制系统的线性数学模型；最后,利用模型参考自适应控制方法（MRAC）设计闭环控制器.仿真结果表明,将基于TSLNN在线延时预测的MRAC方法应用于无刷直流电机调速网络控制系统中,可以获得令人满意的系统动、静态性能.
关键词： 带有时间戳的线性神经网络（TSLNN）;  网络控制系统;  一阶Pade方法;  无刷直流电机调速系统;  模型参考自适应控制（MRAC）    
Abstract:

Aiming at existent randomness, time varying and uncertainty of the information transmission time delay in the networked control systems, the timestamped linear neural network (TSLNN) is adopted to predict the time delay in real-time, on line. Using measurement time delay values of the previous sampled period in actual network as the input data set for the neural network, the widrow-hoff learning rule is chosen as the training algorithm of neural network; With predicted network delay value, and using one-order Pade method to linearize the delay element, the linear mathematical model of the brushless direct-current motor drive networked control systems is established; The model reference adaptive control (MRAC) strategy is introduced to design the close-loop controller for the control system; The results of digital simulation prove that based on TSLNN time delay prediction in realtime, the MRAC for the brushless direct-current motor drive networked control system is feasible, and the dynamic and static response performances of the system are satisfied.
Key words: time-stamped linear neural network (TSLNN)    networked control systems    one-order Pade method    brushless direct-current motor drive systems    model reference adaptive control (MRAC)
出版日期: 2012-03-02
:  TP 273  
基金资助:

国家博士点学科专项科研基金资助项目（20030335002）；浙江省科技厅资助项目（2004C31084）.
通讯作者: 蒋静坪,男,教授,博导.     E-mail: eejiang@dial.zju.edu.cn
作者简介: 于晓明（1979—）,男,博士生,从事网络控制研究工作.Email: xiaoming.yu@hotmail.com。
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引用本文:

于晓明, 蒋静坪. 基于神经网络延时预测的自适应网络控制系统[J]. J4, 2012, 46(2): 194-198.

YU Xiao-ming, JIANG Jing-ping. Adaptive networked control system based on delay prediction
using neural network. J4, 2012, 46(2): 194-198.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2012.02.002    或    http://www.zjujournals.com/xueshu/eng/CN/Y2012/V46/I2/194

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