开关脉冲式自毁指令的可靠传输设计

Reliable Transmission Design of Switch Pulse Self-Destruct Command

针对开关脉冲信号作为紧急自毁指令传输可靠性低的问题,分别从硬件和软件逻辑两方面进行优化。在硬件方面,引入双冗余和低功耗设计,增加了指令传输和备用电源供电的可靠性。在软件方面,从FPGA出现亚稳态、开关脉冲指令的边沿抖动效应及空间电磁辐射三个方面进行误判原因分析,对同步接收后的指令信号采用差额投票表决算法实现软件基础滤波,增加容错性的同时缓解了指令判别的延迟,保证了指令判别的可靠性。经仿真与实验测试,该设计可满足隔离式开关脉冲指令在72 m电缆下长期可靠传输。

For the problem that the switch pulse signal is low reliability of emergent self-destruction command transmission,it is optimized from both hardware and software logic respectively.In terms of hardware,dual redundancy and low power design are introduced to increase the reliability of command transmission and standby power supply.In the aspect of software,the causes of misjudgment are analyzed from three aspects:the metastability of FPGA,the edge-jitter effect of switch pulse and space electromagnetic radiation.The differential voting algorithm is used to filter the instruction signals after synchronous reception,which increases the fault tolerance and alleviates the delay of instruction discrimination,and ensures the reliability of instruction discrimination.The simulation and experimental tests show that the design can realize the long-term reliable transmission of isolated switch pulse instructions under 72 m cable.