网络控制系统时延的预测控制补偿方法  

Predictive control compensation for time delay in networked control systems

作　　者：付伟[1] 杨先一[1] 冯伟[1,2] 刘国权[1] 

机构地区：[1]重庆大学自动化学院,重庆400030 [2]重庆教育学院计算机系,重庆400067

出　　处：《系统工程与电子技术》2011年第9期2066-2071,共6页Systems Engineering and Electronics

基　　金：重庆市教委资助项目(KJ091507)资助课题

摘　　要：针对网络控制系统的时延问题,提出一种补偿方法。对于反馈通道,时延是已存在的,可以进行测量,这部分时延通过预测控制算法进行补偿。前向通道的时延对于控制器是未发生的,是不可知的,为此在系统输出端和前向通道间附加一个控制补偿环节以减小前向通道时延的影响。该方法简单可行,实时性强,便于工程应用。最后分析了系统的稳定性并通过仿真实验表明该策略的有效性,保证了网络控制系统的良好性能。A method is presented to compensate time delay in networked control system. The feedback time delay is calculated by using the time stamp in data packets. An algorithm based on predictive control theory is applied to compensating the delay. The forward time delay is compensated by an extra feedback loop. The compensation strategy is simple and has real-time performance. Simulation results show that time delay in networked control system can be accurately compensated and an excellent network performance is ensured by this strategy.

关 键 词：网络控制系统 时延补偿 预测控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]