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针对四重化冗余结构中由于备用态切换时间对系统性能影响的问题,对其进行改进,提出了四重化冗余并行结构,分析其可信性属性中最重要的可靠性和安全性。根据改进后理论的设计了一套高可信性的计算平台,计算模块使用PowerPC系列处理器,判别器使用FPGA(现场可编程门阵列),内部移植嵌入式软核Nios Ⅱ,两套判别器在FPGA内部构成双核系统。另外在输出端使用竞争输出模块,实现无缝切换。结果表明,整个系统的可信性与实时性良好,适用于各种对可靠性和安全性要求很高的计算环境。
Aiming at the problem that the standby state switching time affects the system performance in the quadruple redundant structure, this paper improves on it and proposes a quadruple redundant parallel structure to analyze the most important reliability and security in its credibility property . Based on the improved theory, a set of high-reliability computing platform is designed. The computing module uses PowerPC series processor, the discriminator uses FPGA (Field Programmable Gate Array), the internal transplantation of embedded soft Nios Ⅱ, two sets of discriminators Dual-core system within the FPGA. In addition, the use of competitive output output module, to achieve seamless switching. The result shows that the whole system is reliable and real-time, suitable for all kinds of computing environments that require high reliability and security.