一种针对COTS器件的抗辐射加固方法

A Radiation Hardened Method Based on COTS Components

随着商用现货(COTS)器件在空间任务中的广泛应用,COTS器件的抗辐射加固显得尤为重要,针对COTS器件在空间环境下易受宇宙射线和高能粒子冲击而产生辐射效应的特点,文章结合三模冗余(TMR)技术与现场可编程门阵列(FPGA)的重构技术,提出了一种基于TMR的可重构星载处理单元抗辐射加固方法。通过基于Markov过程的可靠度分析可知,冗余和重构技术相结合可以使处理单元具有更强的容错能力。文章利用实验模拟验证了该星载处理单元的各项关键技术,结果表明:此处理单元能够屏蔽单模故障,并能够定位和修复由空间复杂环境引发的软错误。

With the COTS（commercial-off-the-shelf）components widely used in space missions,the radiation hardening technology is particularly important for COTS components.The COTS components under the complicated space environment are vulnerable to the effect of cosmic rays and high energy particles.These effects will lead to radiation effects.A design method of onboard processing unit based on TMR（triple modular redundancy）and reconfiguration technology of FPGA（Field Programmable Gate Array）is discussed.The reliability analysis based on Markov processes shows that the combination of redundancy and reconfiguration will further improve the reliability.The key technologies of this processing unit are tested and validated.This processing unit can effectively shield single-mode failures,and it also can locate and repair the soft error.