网络化控制系统采样周期的实时优化

随着计算机科学技术、控制理论和网络通信技术的发展，网络化控制系统受到越来越多的关注．由于网络化控制系统的网络带宽的限制使得网络化控制系统不可避免地存在网络诱导时延，网络诱导时延在一定程度上会降低网络化控制系统的性能．为了优化整个控制系统的性能，文章研究了系统采样周期的优化问题，提出了实时反馈调度器．为此，系统目标函数的选取根据采样周期、网络诱导时延以及作用在系统上的噪声，具体做法根据当前各个子系统中被控对象的状态和噪声特性，周期地分配新的采样周期给各个子系统，最后给出实验结果．

Real-time Optimization of Sampling Period for Networked Control Systems

With the development of computer science and technology, control theory and communication technology, networked control systems have got more and more attention. Because of limited resources, there exist network-induced delays inevitably in the networked control systems, which can degrade the systems performance at a certain extent. The problem of optimal assignment of sampling period is studied in order to optimize the performance of networked control systems. The cost function of subsystems is elected according to sampling period, network-induced delay and character- istic of noise. Based on these, a real-time feedback scheduler is developed to periodically assign new sampling period based on current plant states of subsystem and noise intensities. At last, the experiment is presented.