基于Xenomai的Linux嵌入式系统在轨道交通客运车辆电气控制平台中的应用

A Linux Embedded System Based on Xenomai for Coach Electric Control Platform in Rail Transit

轨道交通客运车辆的电气控制平台是微机化电气屏柜中的智能化控制单元,通过核心控制模块中的嵌入式操作系统完成电气逻辑控制和多种智能监测保护功能。文章通过对Linux与Vx Works这两种主流嵌入式系统的实时性、功能性、性价比和开发资源等方面进行对比分析,设计了一种基于Xenomai微内核移植的实时Linux嵌入式操作系统。该系统既具备Linux的多任务处理能力、丰富的网络制式通信、成熟可靠的图形处理与电能质量监测分析算法,又可实现微秒级的系统任务调度,对轨道交通客运车辆微机化电气屏柜的工程化应用具有重要意义。

Coach electric control platform is an intelligent control platform of the computerized electrical cabinet, which has electrical logic control and various intelligent monitoring and protection functions realized by the embedded operating system of the core control module. This paper compared the performance of two mainstream embedded systems, Linux and VxWorks, in terms of reaMime capability, functionality, cost-effectiveness and development resources cost, and presented a Linux real-time embedded system based on Xenomai plug-ins. The proposed system not only has the multi-tasking capabilities, abundant network standard communication, mature and reliable graphics processing, and power quality monitoring and analysis algorithms of Linux, but also achieves microsecond-level system task scheduling, which has significant effects on computerizing electrical cabinet of passenger vehicles in rail transit.