基于COTS器件的高费效比商业卫星计算机研究

Research on Cost-Effective Commercial Satellite Computer Based on COTS Devices

摘要:

对国内外基于COTS(Commercial Off-The-Shelf)器件的商业卫星计算机进行了研究。针对商业卫星公司对卫星可靠性、运算性能、成本控制、研发周期等要求和实际空间运行环境,分析了目前国内外商用卫星的设计模式和特点,提出一种基于汽车级COTS器件的商业卫星单板计算机系统。在可靠性设计上采用了EDAC、双核Lock-Step等技术,选用单粒子免疫的器件的MRAM和反熔丝FPGA,在保证计算机系统安全性、可靠性、成本控制和运算性能的同时,避免了多核或多处理器冗余加固方案导致的额外软件开发成本,缩短产品研发周期。研究对基于COTS器件的商业卫星计算机的可靠性设计有一定参考价值。

Abstract:

This paper research on commercial satellite computers based on COTS (Commercial Off-The-Shelf) devices at home and abroad. Focusing on the requirements of commercial satellite companies on satellite reliability, computational performance, cost control, and research and development cycle, and the actual space operation environment, the current domestic and foreign commercial satellite design patterns and characteristics are analyzed, and a commercial satellite single board computer system based on COTS devices is proposed. In the reliability design, EDAC, dual-core Lock-Step and other technologies are adopted. The MRAM and anti-fuse FPGA of the single-particle immunity device are used to ensure the security, reliability, cost control, and computing performance of the computer system. It avoids the extra software development cost caused by the multi-core or multi-processor redundancy reinforcement scheme and shortens the product development cycle. Research has certain reference value to the reliability design of commercial satellite computer based on COTS device.