Abstract: Based on the feedback and prediction mechanism,a dynamic scheduling strategy is proposed for the problem that multiple loops share network resources in networked control systems(NCSs).In order to improve the network operational performance and to adapt the network traffic variations,sampling periods of the control systems are adjusted on-line according to the current network status.The NCS with such a dynamic scheduling strategy is a system with variable sampling periods and uncertainty.By equivalent transformation,the system can be equivalent to a class of discrete systems with parametrical uncertainties.Based on the established model,a parametric design method of robust controller is given,and the effectiveness of the method is validated with a simulation example.