基于COTS器件的微纳卫星星载计算机故障建模和注入技术研究
关键词 空间辐射环境 单粒子效应 SystemC 事务级建模 故障模型
毕业论文设计说明书外文摘要
Title Research of CubeSat Based on COTS Components Fault Modeling and Injection Technology
Abstract
As the aerospace industry is growing and developing rapidly, radiation tolerance and hardened technology is gradually becoming the fatal technology of spacecraft design. The proportion of satellite mission interruption or failure caused by radiation effect is rising steadily due to the harsh space radiation environment. By contrast, space agencies around world like NASA and ESA have been researching on the on-board application of Commercial Off-The-Shelf components (COTS as known) which is low-cost and high-performance but poor-radiation-mitigated. Moreover, they had experimentally applied COTS components on small satellite and CubeSat successfully, which means the On-Board Computer (OBC) desiderates more effective fault tolerance and hardened technologies to slash radiation fault risks.Addressing this issue, the overseas work studied on the SystemC modeling approach for system on chip (SoC) developed recently, and proposed a simulation method to build OBC model with SystemC TLM modeling, since traditional OBC design is time-consuming and inefficient. Besides, the fault models are built based on corresponding research of radiation effect fault. This research built a simulation frame platform for the OBC fault tolerance design, which dramatically saves the design cost and period.
Keywords Space Radiation Environment, Single Event Effect, SystemC TLM Modeling, Fault Model
目 次
1 引言 1
1.1 研究目的 1
1.2 主要贡献 2
1.3 论文大纲 2
2 微纳卫星与星载计算机综述3
2.1 微纳卫星任务 3
2.2 星载计算机 4
3 空间辐射环境与辐射效应 7
3.1 空间环境概述 7
3.2 总剂量效应 8
3.3 单粒子效应 9
3.4 故障率计算 9
3.5 抗辐射加固技术 11
4 SystemC TLM模型 15
4.1 SystemC TLM事务级建模方法概述 15
4.2 OBC系统结构模型 16
4.3 辐射故障注入模型 19
5 辐射故障模型21
5.1 CPU故障模型 21
5.2 SRAM与DRAM故障模型 21
5.3 Flash闪存故障模型 22
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