摘要
鉴于数据传输总线的诸多优点,建立总线式体制是现代导弹控制系统互联方式发展的必然趋势。CAN总线是一种设计优良的总线,但缺点在于其事件驱动型的协议导致无法建立CAN总线的可靠调度策略。Tindell给出的基于最小间隔故障模型的WCRT调度分析方法在强干扰环境中会导致乐观偏差,因此需要建立一种CAN总线在复杂环境中的更加准确的调度分析方法以指导可靠的系统设计。基于此目的,给出了一种基于广义泊松过程的改进故障模型,并在此基础上建立了CAN总线消息的调度分析。最后将该调度分析应用于导弹控制系统,并分析了对总线调度能力构成影响的因素。
Due to the advantages of data transmission bus, the bus-based framework is the trend of the interconnecting method of modern missile control system. CAN is a well-designed bus, whose defect lies in its event-driven communication protocol that brings great difficulties in finding a reliable scheduling scheme for CAN. The previous scheduling analysis of CAN presented by Tindell based on minimal-interval fault model, will lead to optimistic error especially in case of strong interference. So it is essential to establish a more accurate scheduling analysis of CAN under complex environment to guide the reliable design of control system. Based on this aim, an improved fault model based on generalized Poisson process is presented, and a new scheduling analysis of CAN based on it is established. In the end, this analysis is applied to a CAN based missile control system, and the factors relative to the bus scheduling are analyzed.
出处
《电光与控制》
北大核心
2010年第3期93-97,共5页
Electronics Optics & Control
关键词
导弹控制系统
CAN总线
调度分析
泊松过程
故障模型
失败概率
missile control system
CAN bus
scheduling analysis
Poisson process
fault model
failure probability
