Research on Mixed Scheduling Algorithm in Industrial Process Networked Control Systems

摘要

Based on the comprehensive scheduling index, a mixed scheduling algorithm is proposed for the problem that periodic tasks and non-periodic tasks share network resources in industrial process networked control systems. A network QoS estimator is used to acquire current network states. In order to improve the network operational performance, mixed scheduling algorithm is adjusted on-line according to the current network status and comprehensive scheduling index. Both the mechanism analysis and simulation show that this algorithm has great real-time performance, low network packet loss and high average performance.