关键词: 零星事件调度, 混杂系统, 可移植的操作系统接口规范, μC/OS-II

Abstract: Sporadic task scheduling is attracting more and more experts as the structure of real time embedded system becoming more and more complicated and its running environment with much uncertainty.This paper is based on project “power design for the precision high frequency magnetism motor”，it introduces standardized POSIX sporadic task scheduling method into original system and improves the robust and real-time characteristic of the whole system.A hardware circuit is used to produce random 0-1 signals to simulate sporadic tasks and the result proves it works very well.Sporadic task scheduling method can be utilized into the scheduling and decision layer of hybrid system in order to improve its performance.

Key words: sporadic task scheduling, hybrid system, Portable Operating System Interface for Computing Environments（POSIX） standardization, μC/OS-II