基于模型预测控制的异采样率双环网络控制系统仿真  

Simulation of dual loop networked control system with different sampling rates based on MPC

作　　者：赵虹[1] 车轲 钟志贤[1] ZHAO Hong;CHE Ke;ZHONG Zhi-xian(College of Mechanical and Control Engineering,Guilin University of Technology,Guilin 541006,China;Wuhan Huagong Cyber Data System Co.,Ltd.,Wuhan 430223,China)

机构地区：[1]桂林理工大学机械与控制工程学院,广西桂林541006 [2]武汉华工赛百数据系统有限公司,武汉430223

出　　处：《桂林理工大学学报》2020年第3期617-622,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51565009)。

摘　　要：在实际应用中,为了追求更佳的性能和更低的成本,网络控制系统往往会采用不同的采样率进行工作。针对一类异采样率双环网络控制系统中的时延补偿问题,设计了一种模型预测控制MPC和PID控制相结合的串级控制算法,通过状态方程模型预测出未来时刻的输出,并进行滚动优化,在线补偿随机网络时延带来的负面影响。进一步利用Matlab/Simulink软件对该算法进行了仿真研究。结果表明,在内外环采样率不同,网络时延随机变化的情况下,该算法比PID-PID和Smith-PID算法具有更好的控制效果,验证了该算法的有效性和优越性。In order to achieve better performance and lower cost,different sampling rates are used to work in networked control system.For time delay compensation in dual loop networked control system with different sampling rates,a cascade control algorithm based on the combination of model predictive control(MPC)and PID control is designed.The output of the future time is predicted by the state equation model,and the rolling optimization is carried out to compensate the negative impact of network time delay online.Furthermore,the simulation research is carried out by Matlab/Simulink.The result shows that the MPC-PID algorithm has better control effect than PID-PID and Smith-PID algorithm when the sampling rates of inner and outer loop are different and the network delay changes randomly.It verifies the effectiveness and superiority of the algorithm.

关 键 词：异采样率 双环网络控制系统 模型预测控制 网络时延 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]