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为了抑制计算机系统软件和硬件可能发生的共模故障,在余度技术的基础上,分析了非相似余度技术及其采用的余度结构和余度数量。分别从硬件架构设计、软件架构设计及热备份切换逻辑等方面详细论述了一种非相似双余度告警计算机的设计和实现方法,并且使用故障树模型分析方法在实验数据的基础上对该系统的可靠性进行了分析和计算。结果表明,采用非相似双余度技术可以有效地抑制系统的软件和硬件可能发生的共模故障,将机载告警计算机系统的可靠性提高到0.999 97。
In order to restrain common-mode faults that may occur in the computer system software and hardware, based on the redundancy technique, the non-similarity redundancy technique and the redundancy structure and redundancy used in the technique are analyzed. This paper discusses in detail the design and implementation of a non-similar double redundancy alarm computer from the aspects of hardware architecture design, software architecture design and hot backup switching logic, and uses the fault tree model analysis method to analyze the system based on the experimental data The reliability was analyzed and calculated. The results show that the non - similar double redundancy technique can effectively restrain common mode faults that may occur in the software and hardware of the system, and improve the reliability of the on - board warning computer system to 0.999 97.