适用于箭载电气系统的混合数据流调度算法
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摘要
针对箭载电气系统,提出一种时分制指令/响应型周期优先级调度算法,并运用网络演算理论分析其实时性。使用Matlab搭建箭载电气系统网络模型,设置不同自变量并与FIFO进行对比。结果表明,算法可有效降低时间触发、事件触发帧的端到端延迟上界,保证时钟同步帧、高优先级周期触发帧的确定性,同时满足低优先级周期触发帧的带宽要求。
The scheduling algorithm used in carrier rocket's electrical system switches is studied. A time-division command/response periodic priority scheduling algorithm is proposed, and its real time performance is analyzed baesd on the network calculus theory. A network model of the carrier rocket's electrical system is built. By setting different independent variables and comparing the network performance with FIFO scheduling method, this algorithm is proved to effectively reduce the end-to-end upper delay bounds of time-triggered frames and event-triggered frames, guarantee the determinacy of clock-synchronization frames and high priority period-triggered frames, and meet the bandwidth requirements of low priority period-triggered frames.
The scheduling algorithm used in carrier rocket's electrical system switches is studied. A time-division command/response periodic priority scheduling algorithm is proposed, and its real time performance is analyzed baesd on the network calculus theory. A network model of the carrier rocket's electrical system is built. By setting different independent variables and comparing the network performance with FIFO scheduling method, this algorithm is proved to effectively reduce the end-to-end upper delay bounds of time-triggered frames and event-triggered frames, guarantee the determinacy of clock-synchronization frames and high priority period-triggered frames, and meet the bandwidth requirements of low priority period-triggered frames.
引文
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[4]罗兴科,蓝鲲,王昕.一种可用于箭载测量数据综合的网络交换技术[J].遥测遥控,2013,34(4):1-5.LUO Xingke,LAN Kun,WANG Xin.A network switching technology for measurement data integration of launch vehicle[J].Journal of Telemetry,Tracking and Command,2013,34(4):1-5.
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[6]王臣虎.AFDX航空网络的可靠性建模与性能分析[D].上海:上海交通大学,2012:13-17.WANG Chenhu.Reliability modeling and perfomance analysis of AFDX avionics network[D].Shanghai:Shanghai Jiao Tong University,2012:13-17
[7]张连明,陈志刚,黄国盛.网络演算理论及应用研究[J].计算机工程与应用,2006(27):8-11,173.ZHANG Lianming,CHEN Zhigang,HUANG Guosheng.A survey on theory and application of network calculus[J].Computer Engineering and Applications,2006(27):8-11,173.