As a result of studying , we gain three system time capability parameter of monolayer bus framework and two - double bus framework , data bus utilization , length of the data waiting queue and time of system timed , basing on fixed bc control seasonal repertoire timed petri net and stochastic petri net 研究結(jié)果分別得出了單總線和雙總線的基于固定主控端周期指令時(shí)延petri網(wǎng)的數(shù)據(jù)總線利用率、等候消息隊(duì)長(zhǎng)、系統(tǒng)延時(shí)時(shí)間;基于隨機(jī)petri網(wǎng)的數(shù)據(jù)總線利用率、等候消息隊(duì)長(zhǎng)、系統(tǒng)延時(shí)時(shí)間共三個(gè)系統(tǒng)時(shí)間性能指標(biāo)。