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航空电子核心处理分区优化设计及仿真研究

     

摘要

Partition management technology is widely adopted in core processors of avionic system with strict real-time and security guarantee ability. Through the hierarchical scheduling architecture, task executions can be isolated from time and space. The partition schedule design was discussed in this paper with focus on fixed-priority and dynamical-priority strategy by treating the preemptive behavior of partition as a virtual periodical task. The spare time in partition scheduling was used to construct the satisfied scheduling condition,and the parameter solving expressions were given. Based on the maximum task response delay rate and partition switching cost,the optimal partition design method was proposed. At last,the method for the simulation of core processor system was discussed and the simulated engine was figured out.%具有严格实时保障和安全保障的航空电子核心处理系统广泛采用分区管理技术,通过分层调度结构,满足任务时空隔离运行.通过将分区抢占行为看作是一个虚拟周期任务,针对下层调度器分别采用固定优先级和动态优先级两种调度策略,讨论了分区调度设计问题;利用分区任务调度的空闲时间构建分区调度保障条件,给出了满足任务可调度性的分区参数求解表达式;在利用任务最大响应时间延迟率和分区切换开销的基础上,给出了分区参数优化设计方法;最后讨论了核心处理系统仿真方法,给出了仿真引擎设计模型.

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