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为了提高卫星系统的控制精度,解决系统故障检测与故障处理问题,进行了卫星节点智能化设计。以嵌入式SOC处理器为基础,建立了智能化网络节点的体系结构,将其划分为自诊断及上位机辅助单元、智能电源管理单元、标准化接口单元和基本功能单元等4个部分。采用过采样技术和数据融合处理技术提高了自诊断及上位机辅助单元的数据采集精度,采用直接冗余检测和知识检测方法实现了数据纠错功能,采用自断电/加电技术实现了智能电源管理功能,基于标准无线接口设计实现了接口标准化功能。最后,在太阳矢量测量仪原理样机上对所设计的智能化网络节点进行了功能验证。结果表明:智能化太阳矢量测量仪测量精度可达0.01°,高于传统太阳敏感器的采集精度0.1°;实现了状态自检、测量数据校验及标准接口功能,提高了卫星系统的可靠性。设计的网络节点可进行自主故障检测及处理,具备自断电/加电功能,能够针对空间环境带来的翻转及锁定进行自主处理,支持单机设备的即插即用,可实现卫星系统的快速测试、快速集成和快速装配。
In order to improve the control accuracy of the satellite system and solve the problem of system fault detection and fault handling, the satellite node intelligent design was carried out. Based on embedded SOC processor, the architecture of intelligent network node is established, which is divided into four parts: self-diagnosis, host computer auxiliary unit, intelligent power management unit, standardized interface unit and basic function unit. Adopting oversampling technology and data fusion processing technology to improve the data acquisition accuracy of self-diagnosis and host computer auxiliary unit, using the direct redundancy detection and knowledge detection method to achieve the data error correction function, the use of self-power-off / power-up technology to achieve the intelligence Power management functions, based on standard wireless interface design to achieve the interface standardization. Finally, functional verification of the designed intelligent network node is carried out on the principle prototype of the solar vector measuring instrument. The results show that the measurement accuracy of the intelligent solar vector measuring instrument is up to 0.01 °, which is higher than that of the traditional solar sensor by 0.1 °. It realizes the status self-checking, measuring data checking and standard interface functions and improves the reliability of the satellite system . The designed network node can perform self-fault detection and processing, with self-powered-off / power-on function, capable of autonomously processing the flipping and locking caused by the space environment, and supporting the plug-and-play of stand-alone devices, enabling fast satellite system Test, quick integration and quick assembly.