网络控制系统中混合调度算法的研究

Research on Mixed Scheduling Algorithm in Networked Control System

网络控制系统的性能与信息调度有关,而以往的调度算法大多把时间属性作为确立优先级的依据,无法反映出消息的重要性。该文在最大误差优先算法的基础上,提出以最大优先变化为主,越长时间越低优先级为辅的混合调度算法,丰富了优先级的确立依据。仿真实验结果表明,该混合调度算法能够有效提高控制系统的整体性能。

The performance of Networked Control System（NCS） depends on the message scheduling. However, most scheduling algorithms make the time characteristic as the basis for establishing the priority, which can not show the importance of information. A mixed scheduling algorithm based on Maximum Error First（MEF） algorithm is proposed, in which the Maximum Change First（MCF） algorithm is major and the Larger Delay Lower Priority（LDLP） algorithm is minor. This new algorithm enriches the basis for establishing the priority. Simulation experimental results show this mixed scheduling algorithm can promote the whole performance of the control system effectively.