摘要
在实际的工程系统中,采样频率的选择取决于系统中信号的最高频率,网络传输延时取决于网络本身的传输特性。由此可见,网络传输延时与采样周期没有相应的关系,但在网络控制有关的文献中往往假定网络延时小于一个采样周期。本文针对这种不合理的设定,提出了一种新型的长延时预测控制算法。首先对一类长延时网络控制系统进行了建模;接着利用预测函数控制原理导出了长延时网络控制系统的预测控制律;最后给出了仿真实验结果,表明了在对一类长延时网络系统的控制中,本文提出算法的合理性和有效性。
In practical engineering system, the selection of sampling frequency is decided by the highest system sig- nal frequency and the network communication delay relies on the network structure. Consequently, there is no corresponding relation between the network transmission delay and sampling period, nevertheless most papers about networked control systems （NCS） usually assume that the network delay is less than a sampling period. In this paper, a new long delay predictive control algorithm is put forward to avoid this illogical premise. The algorithm firstly builds model for a class of long delay networked systems, then derives the predictive control law for the long delay networked control systems by using predictive functional control principle. At last, simulation results are given, which illustrate that the proposed scheme is effective for a class of long delay networked control systems.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2008年第5期1006-1010,共5页
Chinese Journal of Scientific Instrument
基金
国家博士点学科专项科研基金(20030335002)
浙江省科技厅(2004C31084)资助项目
关键词
网络控制系统
长延时
预测函数控制
networked control system
long delay
predictive functional control
