基于FPGA的多层级抗辐射架构研究OA

Satellites operate under extreme environmental conditions and high economic constraints.While static random-access memory(SRAM)-based field programmable gate arrays(FPGAs)have become core components in satellite electronic systems due to their high logic density and dynamic reconfigurability,their configuration memory remains vulnerable to space radiation.To balance the hardware cost reduction with stringent on-orbit reliability requirements,this paper proposes a hybrid triple modular redundancy(TMR)storage architecture integrated with a cold-standby mechanism.An external FPGA is introduced to manage the firmware maintenance for peripheral devices.The proposed architecture and circuit design ensure the high-reliability data output by performing autonomous error detection and correction for single-event upsets.Upon detecting permanent faults,the system executes adaptive strategies such as cold-spare replacement to achieve graceful stability degradation over time.The reliability analysis based on continuous-time Markov chains demonstrates that the proposed architecture exhibits robust resistance to both transient upsets and permanent damage.The experimental results indicate that,compared with traditional designs,the mission time improvement factor increases by over 10 times,while the hardware costs are reduced by 58%.These findings validate the feasibility of substituting radiation-hardened components with domestic commercial chips for specific aerospace applications.