网络控制系统PI预测控制及稳定性分析  

Predictive control system with proportional-integral structure and stability analysis

作　　者：付伟[1] 杨先一[1] 柴毅[1] 刘国权[1] 

机构地区：[1]重庆大学自动化学院,重庆400030

出　　处：《计算机工程与应用》2012年第17期10-15,共6页Computer Engineering and Applications

基　　金：国家自然科学基金(No.60974090)

摘　　要：将PID反馈原理引入广义预测控制(GPC)思想,把GPC目标性能函数改造成具有PI的结构形式,根据反馈时延导出多步控制序列,通过时延补偿器对前向时延进行补偿,使控制性能在网络环境下得到极大改善。控制器结合了PID控制和预测控制的优点,具有较强的鲁棒性和工程意义。构造Lyapunov函数对闭环系统的稳定性进行分析,并通过仿真验证了该算法的有效性。Based on Generalized Predictive Control（GPC） and PID feedback control, the predictive control system with Proportional-Integral （PI） structure introduced by this paper transforms GPC objective performance function in- to one with PI structure.The controller outputs multi-step control sequence according to the objective performance function and feedback delay.Delay compensator picks out control signal from the sequence to compensate time de- lay.So the system performance is improved greatly.Combining PID control and predictive control advantages, the controller has strong robustness.The stability of the closed-loop system is analyzed.Simulation results demonstrate the effectiveness of the algorithm.

关 键 词：网络控制系统 网络时延 预测控制 PID控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]