网络时延的模糊逻辑补偿方法的研究

当网络应用到控制系统中时,网络将引起时延,从而对闭环网络控制系统产生一些不利的影响,比如系统性能下降,系统不稳定等。本文介绍了通过在已有的PI控制器的基础上,再增加一个模糊逻辑补偿器来补偿网络控制系统中网络所引起的时延,其优点是不需要再重新设计已有的PI控制器,而只是简单地将模糊逻辑控制器的输出作为一个参数来调节PI控制器所提供的控制信号。文中采用了MATLAB/SIMULINK仿真,仿真结果表明了该方法的有效性。

Research on Fuzzy Logic Compensator for Network Delays

Time delay will be generated when a communication network is applied into control system, which will arouse adverse effects on the closed-loopnetworked control system such as performances degradation and system destabilization. In this paper, we propose a fuzzy logic compensator on top of a PI gain to adaptively compensate for the time delay induced by network in networked control systems. One of the advantage of this proposed fuzzy logic compensator is that we do not need to completely redesign the existing PI controller, but simply modulate the control signalprovided by PI controller with the output of the fuzzy logic controller. This paper adopts MATLAB/SIMULINK simulation. Simulation result shows the validity of the proposed method.