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。
Defining the periodic task model for weakly hard system, the PV-RM scheduling algorithm is presented on the basis of RM scheduling policy.
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。
The characteristic of the periodic task of control system is analyzed, and a periodic task model is given.
目前现有的基于周期性任务模型的确定性分析方法比较保守，不适合于多媒体、通讯等软实时系统的可调度性分析。
The existing deterministic analysis methods based on period task modes are conservative, and are not suitable for soft real time systems such as multimedia systems and communication systems.
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