多功能相控阵雷达实时任务调度研究

Study on Real-Time Task Scheduling of Multifunction Phased Array Radars

针对多功能相控阵雷达资源调度问题,建立了合理的雷达任务模型并提出一种新的调度算法.在雷达任务模型中将每一类驻留请求合并为一种任务,这样可以为调度处理提供最大的灵活性,同时基于此任务模型分析了调度器的时间负载.所提出的调度算法综合考虑了任务的工作方式优先级和截止期两个参数,可以较好地适应不同的负载情况.给出了算法的具体实现步骤,并以截止期错失率作为评估指标进行了仿真验证.仿真结果表明,本文所提出的调度算法能够有效降低任务的截止期错失率,对调度性能有明显的改善.

A reasonable task model of multifunction phased array radars is built, and a novel approach to schedule radar tasks in a real-time fashion is proposed. In the task model each kind of dwell requests combines to form a task, which can provide the maximal flexibility for the radar scheduler. And the method of calculating time load of the scheduler is given based on the task model. The proposed algorithm takes the priority of task＇ s function mode and the deadline into account synthetically, and can adapt different load conditions better. The method is evaluated with the missed deadline ratio, and the simulation results show the proposed algorithm can improve the performance of the radar scheduler effectively.