A mixed scheduling algorithm for thermal process network control systems

Aiming at the characteristics of thermal process network control system, a mixed scheduling algorithm based on Synthetic Scheduling Index (SSI) is presented. Firstly, a network QoS estimator is used to acquire current network states. When network utilization is smaller than set value, taskpsilas residual time and static priority are adopted to schedule task. Otherwise, network QoS scheduler dispatches task dynamically by MEF-TOD algorithm, combined with taskpsilas residual time and priority in the SSI. Both the mechanism analysis and simulation show that this algorithm has great real-time performance to random load thermal process, with high average performance, low network time-delay and packet loss, and strong practicality.