零星任务调度在多控制任务系统中的应用

Application of Sporadic Task Scheduling to Multi-Control-Task System

为了在单处理器上实现可靠的实时多任务控制,引入任务调度思想。以油温控制系统为例,应用PID-模糊复合控制器,讨论在单处理器上实现多个油温控制器时,由于算法切换,会引起处理器“过载”,因此在μC/OS-Ⅱ实时嵌入式操作系统平台上,应用基于服务器的零星任务调度策略。实验证明,此方法能够有效地调度各个实时控制任务,保证它们满足各自的截止期限,获得了较好的控制效果。

In order to ensure successful real-time control tasks for a single processor, task scheduling method is adopted, which is a new research area that has emerged. Taking the oil temperature control system for example, the execution time of the designed PID-Fuzzy controller may change abruptly between different modes, and the processor may be overloaded. Therefore using a periodic server to deal with sporadic task based on μC/OS-Ⅱ is necessary, it can schedule all real-time tasks effectively. Experiments show it is feasible and good control performance is achieved.