网络控制系统Smith预估时滞补偿方法的研究

为了减小网络控制系统中网络诱导时延以及非线性系统本身的滞后对系统控制性能的影响,提出了一种改进的Smith预估时滞补偿方法,采用最小二乘法对被控对象进行测量、辨识,同时引入模糊自适应PID控制,无需确定系统的随机时延。实验结果表明,此种方法是简单而且可行的,提高了系统的稳定性。

Smith Predictive Time-deIay Compensation Methods in Network ControI Systems

In order to restrain the impact of network- induced delay on the NCS,and delay of nonlinear system itself,an improved Smith predictive time-delay compensation method is proposed in this paper.The least square method is utilized to measure the controlled object.At the same time the adaptive fuzzy-PID control is introduced.It needn’t measure the random time-delay of the system.The result shows that the method is simple and feasible.It improves the stability of the system.