摘要
针对某遥感卫星静态随机存取存储器(SRAM)芯片故障导致中央单元(CTU)主机无法启动的问题,高分三号(GF-3)卫星数管CTU软件设计了一种静态随机存取存储器(SRAM)芯片故障模式下的多分区引导方法。通过在可编程只读存储器(PROM)中增加一个应急故障处理软件分区,在SRAM芯片部分故障情况下,CTU软件能够从正常CTU软件分区跳转到应急故障处理软件分区,并引导CTU软件进入应急故障处理模式。在该模式下执行SRAM芯片故障检测和正常CTU软件在轨注入,使CTU使用SRAM芯片无故障区域运行正常CTU软件。在GF-3卫星中,对该方法进行了软件实现和验证,结果表明:此方法可在中央处理单元SRAM芯片部分故障情况下,提供一种挽救方案,从而避免采取单一的切换备机处理措施导致CTU主机彻底不能使用的问题,提高了数管分系统的可靠性。
The failure of SRAM chip in a remote sensing satellite has caused the current central terminal unit （CTU）failed to boot up,GF-3 satellite central terminal unit software designed a multi-partition boot method under the fault mode of SRAM chip.By adding an emergency fault handling program partition in the PROM,in the case of SRAM chip part failure,center terminal unit software will jump from normal program partition to emergency fault handling program par-tition,and lead the central terminal unit into emergency fault handling mode.In this mode,the SRAM chip fault detection and on-board software maintenance are executed,so that the central terminal unit can run the normal CTU program using the SRAM trouble-free zone.In GF-3,this method is realized and verified,the result shows that the method provides a rescue plan in the case of central terminal unit SRAM part failure,so avoiding the single switching measure which will cause the current CTU to be completely unusable,and improves the reliability of the on board data handling subsystem.
出处
《航天器工程》
CSCD
北大核心
2017年第6期126-131,共6页
Spacecraft Engineering
基金
国家重大科技专项工程
关键词
高分三号卫星
中央单元
多分区
引导
数管分系统
GF-3 satellite
center terminal unit（CTU）
multi-partition
boot
on board data han-dling subsystem
