The characteristic of the periodic task of control system is analyzed, and a periodic task model is given.

分析了控制系统中的周期性任务特性，给出了控制系统中周期性任务模型。

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This paper presents a task model for real time systems and gives the conditions that guarantee periodic and aperiodic tasks to be schedulable respectively.

提出了一种实时系统任务模型，分析了该模型中周期和非周期任务可调度的条件，并给出了一种强实时非周期任务的可预测调度算法。

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Defining the periodic task model for weakly hard system, the PV-RM scheduling algorithm is presented on the basis of RM scheduling policy.

在定义弱硬实时系统周期任务模型的基础上，提出基于RM调度策略的弱硬实时调度算法PV - RM。

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