基于滑模预测的网络控制系统

Network control system based on sliding mode prediction

针对网络控制系统存在时延和丢包导致系统性能下降的问题,提出一种新的时延和丢包补偿方法。首先建立具有时延的网络控制系统空间模型,通过线性转换,将有时延的网络控制系统转化为无时延系统,并采用自回归算法对时延进行在线预测,然后给出一种改进趋近律的滑模控制器对时延进行补偿,采用具有逻辑判断功能的零阶保持器改善丢包问题。该方法在预测时延方面具有较好的实时性,在处理丢包问题方面有较好的系统稳定性和鲁棒性。通过Truetime平台仿真结果表明,该方法对网络时延和丢包有较好的补偿作用。

Aiming at the problem of system performance degradation caused by delay and packet loss in the network control system,a new delay and packet loss compensation method is proposed.First,establish a time-delayed network control system space model,transform the time-delay network control system into a non-delay system through linear conversion,and use autoregressive algorithm to predict the time delay online,and then give an improved reaching law the sliding mode controller compensates for the delay,and uses a zero-order holder with logic judgment function to deal with the packet loss problem.This method has better real-time performance in predicting time delay,and better system stability and robustness in dealing with packet loss problems.The simulation results on the Truetime platform show that this method has a better compensation effect on network delay and packet loss.