容错系统不仅会产生硬件故障,由于连续长时间的运行,系统的性能也会逐渐下降或失效,即老化现象。综合考虑容错系统中的硬件故障和老化现象,提出了将传统的冗余技术和软件抗衰技术相结合的策略,并给出了该系统的非马尔可夫随机Petri网模型,随之对基于该模型的系统进行了定量分析。 Fault-tolerant systems not only generate hardware failures, but also result in gradual degradation or failure of the system due to continuous long-term operation, ie, aging. Considering the fault and aging of hardware in fault-tolerant system, a strategy of combining traditional redundancy technology and software anti-failure technology is proposed, and a non-Markov random Petri net model of the system is given. The model’s system was quantitatively analyzed.