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有限状态机作为星载数字系统实现控制逻辑的重要手段,其稳定性直接影响系统的正常运行.空间辐射环境所造成的单粒子翻转效应会导致有限状态机不稳定.目前常用的容错方法适于处理状态机的1位翻转错误,而具有高可靠性要求的系统还需要能处理2位翻转错误.基于(16,8)准循环码的有限状态机容错设计方法,可实时纠正1位或2位翻转错误,检测到3位翻转错误,使有限状态机拥有更高的可靠性.此方法同时具有硬件易实现,系统延时小等优点.
As an important means of realizing control logic in spaceborne digital system, the finite state machine has a direct impact on the normal operation of the system, and the single-particle flip effect caused by space radiation environment will lead to the instability of the finite state machine. A 1-bit rollover error of the state machine is required, whereas a system with high reliability requirements also needs to be able to handle 2-bit rollover error. A finite state machine fault tolerant design method based on (16,8) quasi-cyclic codes can correct 1 bit or 2 Bit flip error, detected 3 bit flip error, the finite state machine has a higher reliability.This method also has the hardware easy to implement, the system delay is small and so on.