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针对飞行器测控系统多任务和高实时性的要求,提出了一种基于DDS(数据分发服务)规范的数据分发服务模型。它以发布/订阅模型为基础,支持通过设置和调整服务参数,实现不同的数据需求和传输方式;同时在模型中引入了一种基于兴趣过滤的数据订阅方法,支持订阅者更细粒度地表达订阅兴趣,以提升通信效率。试验结果表明,该模型在任务和负载数量增加时仍具有较好的时延控制能力,可满足测控系统多任务、高实时性等任务需求,并具有良好的扩展性。
In order to meet the requirements of multi-mission and high-real-time aircraft measurement and control system, a data distribution service model based on DDS (Data Distribution Service) is proposed. Based on the publish / subscribe model, it supports different data requirements and transmission modes by setting and adjusting service parameters. At the same time, it introduces a data subscription method based on interest filtering to support subscribers to express more granularly Subscribe to interest to improve communication efficiency. The experimental results show that this model still has better time delay control capability when the number of tasks and loads increases, which can meet the tasks of multi-task and high real-time measurement and control system and has good expansibility.