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时延是控制网络性能分析中最重要的一个因素.针对网络控制系统中最常用的拓扑结构和数据特性,基于统计网络演算,得出了系统在不同调度策略下的时延模型.利用该模型计算了控制网络中实时数据的时延分布和统计上界,并与确定性网络演算得出的时延上确界进行了比较,评价了该上确界的悲观程度.
Time delay is one of the most important factors in controlling network performance analysis.According to the most commonly used topology and data characteristics in networked control systems, a delay model of the system under different scheduling strategies is derived based on statistical network calculus.Using this model The delay distribution and statistical upper bound of real-time data in control network are calculated and compared with the exact bound of delay in deterministic network calculus, and the pessimistic degree of the upper bound is evaluated.