基于VxWorks的冗余通信控制系统研究与实现

发布时间：2018-01-06 02:29

本文关键词：基于VxWorks的冗余通信控制系统研究与实现　出处：《西安电子科技大学》2012年硕士论文　论文类型：学位论文

更多相关文章： VxWorks 双冗余 互锁退避 混合调度

【摘要】：针对机载航电系统大综合的趋势，对于系统的实现，要求其控制能力和运算能力要更强，系统可靠性指标要更高。本文研究了基于VxWorks操作系统的机电冗余通信控制系统的关键技术及其实现。从增加系统可靠性和实时性角度对系统进行了双CPU冗余设计。本文对双CPU冗余通信控制技术进行了深入研究，对比分析当前几种流行的嵌入式操作系统，根据实时性、可靠性和适应性的要求选择了VxWorks实时操作系统；提出了一种适用于抢占式接管的互斥机制——PETO互斥机制，解决了双CPU冗余切换过程中可能出现的互锁问题；提出了一种新的内总线令牌退避算法，验证了基于该退避算法的回访机制的有效性，使CPU发送回访数据的冲突概率降低了2.72%，提高了双CPU冗余系统通信控制的可靠性；采用多任务模块化的设计思路，实现了冗余切换模块、数据采集模块、通信接口模块的软硬件设计；研究了多任务混合调度算法并完成了软件仿真。完成了系统整体功能测试，结果表明达到了系统设计性能指标要求。
[Abstract]:According to the trend of the integrated avionics system, for the realization of the system, the control ability and operation ability is stronger, higher system reliability index. This paper studies the key technology of electromechanical redundant communication control system of VxWorks operating system and its implementation based on the double CPU redundancy design to increase the reliability of the system from the system real time and angle.
This paper makes a deep research on dual redundant CPU communication control technology, embedded operating system comparison and analysis of several current popular, according to the real-time, reliability and adaptability of the requirement of VxWorks real-time operating system; a method is presented for the preemptive takeover of mutex mechanism - PETO mutex mechanism to solve the possible problems of double interlocking CPU redundancy switching process; proposed backoff algorithm a new token bus, to verify the validity of the backoff algorithm return mechanism based on the collision probability CPU to send return data is reduced by 2.72%, improve the reliability of dual redundant CPU communication control system; the design of multi task module. The redundant switching module, data acquisition module, the hardware and software design of communication interface module; studied the multi task scheduling algorithm and the software simulation. The overall function test of the system shows that the system design performance requirements are met.

【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP273;TP368.1

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