硬X射线调制望远镜卫星1553B总线芯片RAM故障容错设计

RAM Fault Tolerant Design of 1553B Bus Chip for HXMT Satellite

针对硬X射线调制望远镜(HXMT)卫星总线控制器(BC)端和远程终端(RT)1553B总线芯片的使用特点,提出了一种针对性的容错设计。通过上注指令,触发计算机检测总线芯片随机存取存储器(RAM)区故障范围,并根据故障情况,使用RAM备份区域替换故障区域,从而使故障芯片恢复正常。在HXMT卫星及后续遥感卫星中,对此方法进行了软件实现和验证,结果表明:该方法可灵活便捷地处理多种总线芯片RAM区故障,避免了采用传统在轨维护方法给整星安全带来的风险。

For the use of 1553B bus chip of BC and RT terminal,a fault tolerant design is proposed.By injecting instruction,triggers the computer to detect the fault range of the bus chip RAM area,and according to the failure situation,the backup area is used to replace the fault area,so that the fault chip is restored to normal model.In the HXMT(hard X-ray modulation telescope)and the subsequent remote sensing satellite,this method is implemented and verified,the result shows that this method is flexible and convenient to handle kinds of bus chip RAM fault,and the risk caused by traditional on-board software maintenance of the spacecraft can be avoided.