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《Journal of Southeast University(Natural Science Edition)》 2013-06
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Schedulability of train speed and position measurement system based on time-triggered multi-sensor fusion

Ma Weigang;Ma Jianfeng;Hei Xinhong;Cao Yuan;School of Computer,Xidian University;School of Computer Science and Engineering,Xi’an University of Technology;School of Electronic and Information Engineering,Beijing Jiaotong University;  
The scheduling policy is studied with the time-triggered static scheduling table. The scheduling model of the multi-sensor fusion poisoning system is presented. The scheduling models of hard time constrained periodic tasks,soft time constrained aperiodic tasks and timeout detection tasks are established. The system time consumption and the CPU utilization rate are computed based on the task-time requirement function. In order to ensure the predictability and safety of the system,a schedulability theorem is proposed under both hard and soft time limits. The field tests on the train speed control and the positioning system showthat the proposed method can adequately schedule both hard and soft time constrained tasks,and the system utilization rate and responding time meet the requirements of train control systems.
【Fund】: 国家高技术研究发展计划(863计划)资助项目(2012AA112001);; 国家自然科学基金资助项目(61100173 U1334211);; 中央高校基本科研业务费专项资金资助项目(2012JBM023);; 高等学校博士学科点专项科研基金新教师类课题资助项目(20120009120004);; 西安市科学技术局基金资助项目(CXY1337(7))
【CateGory Index】: U270.38
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