网络控制系统的模型建立及稳定研究

随着互联网技术的发展,以太网逐渐被引入到工业控制领域.对于一个网络控制系统,网络带来的控制系统时滞和丢包是不可避免的,因此,在对网络控制系统的建模中,必需重点考虑时延和丢包的影响.分析了网络控制系统的时延特征,并将数据丢包的网络控制系统建模成具有事件率约束的异步动态系统.对网络控制系统模型用传统的PID算法对系统进行仿真控制,在存在系统随机时延和不存在随机时延的两种情况下,仿真分析了网络控制系统的稳定性,仿真结果进一步验证了网络控制系统保持稳定的丢包范围.

Research on Stability and Model Creation of NCSs

With the development of network technology,Ethernet has been gradually introduced into industrial control fields.Because of the ineluctability of the network-induced time delay and data packet dropout,model creation for NCSs must take them into account especially.The article analyses the character of the network-induced time delay and establishes a Model based on Data packet dropout into Asynchronous Dynamical Systems,then simulinks the NCSs with PID method.Aiming at network-induced time delay and data pack...