Novel Periodic Task Model of Control System and its Optimal Scheduling Algorithm
Huai Liu · Mini-micro Systems · 2004
The characteristic of the periodic task of control system is analyzed, a novel task model —periodic task decomposition model that divides a control loop into several subtasks is presented. A scheduling algorithm called dual priority scheduling algorithm for this task model is given, and assistant priority is imported. This scheduling algorithm can control the execution sequence of subtasks and reduce control input output delay. The schedulability of task set is analyzed and a necessary and sufficient schedulability constraint is presented. Finally, the problem for optimizing control performance is discussed and optimal scheduling algorithm is given.