DDS在嵌入式航电分布系统中的应用研究

发布时间：2018-08-08 20:13

【摘要】：在航空电子领域,模块化技术日渐成熟,传感器／武器平台也越发的智能化,在作战平台的信息域优势向认知域优势的过渡过程中,一种打破武器平台之间、平台内各传感器之间的物理连接,实现各系统间无缝连接的数据分发平台就成为研究的方向。在典型分布式系统中,中间件技术可以有效的降低项目开发难度与成本,并且可以提供服务质量策略即QoS的支持。所以,在分布式的航空电子系统当中,采用中间件技术已经成为了一种良好的解决方案。传统的信息系统,如通信导航识别(CNI)系统(包括模块化程度更高的ICNI系统)或者数据链(DL)系统等都是分布式的系统。但是这些系统在设计和开发时没有采用中间件技术,都是以过程为中心,而在认知域,面向数据的分布式架构是必须的。和传统的开发方法相比较,DDS中间件采用发布／订阅体系结构,对实时性要求提供更好的支持。DDS是以数据为中心的发布／订阅通信模型,针对强实时系统进行了优化,提供低延迟、高吞吐量、对实时性能的控制级别,从而使DDS能够广泛应用于航空、国防、分布仿真、工业自动化、分布控制、机器人、电力及网络化的消费电器等多个领域。本文将从搭建实际的异构平台,在试验环境中构建以数据为中心的分布式应用程序、以及使用DDS的QoS策略来证明数据分发服务能够提供实时系统所要求的性能、可预测性和资源可控性,同时将分析试验数据,并与已有的项目进行比较,证明DDS可以在未来项目中使用的可行性,得到可行性分析报告。本分布式系统平台采用基于PowerPC+VxWorks的软硬件设计方案,采用DDS中使用的面向对象技术与设计模式,来实现由串口和RapidIO两种传输介质构成的异构平台的数据分发功能。虽然现在Windows平台下分布式数据分发的工具和组件比较多,但是国内外对嵌入式平台的研究很少,而且在这些方面进行研究的技术人员也更少。本文对嵌入式平台下分布式实时系统中群组通信以及性能做分析,并获得相关的性能指标以及DDS应用于其他分布式作战信息服务系统的可行性报告。
[Abstract]:In the field of avionics, the modularization technology is mature and the sensor / weapon platform is more intelligent. In the transition process of the information domain advantage of the operational platform to the cognitive domain, a data distribution platform that breaks the weapon platform, the physical connection between the sensors in the platform, and the seamless connection between the various systems is formed. In a typical distributed system, middleware technology can effectively reduce the difficulty and cost of project development and provide the support of QoS. Therefore, middleware technology has become a good solution in the distributed avionics system.
Traditional information systems, such as communication navigation recognition (CNI) systems (including more modularized ICNI systems) or data chain (DL) systems, are distributed systems. However, these systems are not used in the design and development of middleware technology, all are process oriented, and in the cognitive domain, a data oriented distributed architecture is necessary. Compared with the traditional development method, the DDS middleware uses the publish / subscribe architecture, provides better support for real-time requirements, and.DDS is a data centric publish / Subscribe Communication model. It optimizes the strong real time system, provides low latency, high throughput, and control level for real-time performance, so that DDS can be widely used. It can be used in many fields such as aviation, national defense, distributed simulation, industrial automation, distributed control, robotics, power and networked consumer electrical appliances.
This paper will build a data centric distributed application in the experimental environment, and the QoS strategy using DDS to prove that the data distribution service can provide the performance, predictability and resource controllability of the real-time system, and analyze the experimental data and compare with the existing projects, The feasibility and feasibility analysis report of DDS can be proved in the future project. The distributed system platform adopts PowerPC+VxWorks based software and hardware design scheme, uses object-oriented technology and design pattern used in DDS to realize the data distribution function of heterogeneous platform composed of two kinds of transmission media with serial port and RapidIO.
Although there are a lot of distributed data distribution tools and components under the Windows platform, there are few research on embedded platforms at home and abroad, and there are fewer technical personnel in these fields. This paper analyzes the group communication and performance in the distributed real-time system on the embedded platform, and obtains the related performance indicators. And the feasibility report of DDS applied to other distributed combat information service system.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1

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