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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2024 Vol.25 No.4 P.600-615
A spaceborne advanced storage system for remote sensing microsatellites
Abstract: With the development of satellite miniaturization and remote sensing, the establishment of microsatellite constellations is an inevitable trend. Due to their limited size, weight, and power, spaceborne storage systems with excellent scalability, performance, and reliability are still one of the technical bottlenecks of remote sensing microsatellites. Based on the commercial off-the-shelf field-programmable gate array and memory devices, a spaceborne advanced storage system (SASS) is proposed in this paper. This work provides a dynamic programming, queue scheduling multiple-input multiple-output cache technique and a high-speed, high-reliability NAND flash controller for multiple microsatellite payload data. Experimental results show that SASS has outstanding scalability with a maximum write rate of 2429 Mb/s and preserves at least 78.53% of the performance when a single NAND flash fails. The scheduling technique effectively shortens the data scheduling time, and the data remapping method of the NAND flash controller can reduce the retention error by at least 50.73% and the program disturbance error by at least 37.80%.
Key words: Microsatellite; Spaceborne advanced storage system (SASS); Scalability; Performance; Reliability
1浙江大学微小卫星研究中心，中国杭州市，310027
2浙江省微纳卫星研究重点实验室，中国杭州市，310027
摘要：随着卫星小型化技术和遥感技术的发展，微纳卫星星座的快速部署与应用是必然趋势。由于体积、重量和功率(SWaP)的限制，具有高扩展性、高性能和高可靠性的星载存储系统仍然是遥感微纳卫星的技术瓶颈之一。基于商用现货(COTS)现场可编程门阵列(FPGA)和存储器件，本文提出一种小型化星载先进存储系统(SASS)设计。该设计为微纳卫星多通道载荷数据提供了基于动态规划调度与队列调度的多输入多输出缓存技术和一种高速、高可靠性的NAND flash控制器。实验结果表明，SASS具有出色的可扩展性，支持多通道数据调度与存储，适配不同型号遥感卫星。其最大数据写入速率可达2429 Mb/s，在单个NAND flash故障时，数据写入速率至少能保留78.53%。动态规划调度与队列调度有效缩短了数据调度时间，提高数据调度实时性，提出的数据重映射法使NAND flash数据驻留错误降低了至少50.73%，存储误码率降低了至少37.80%。
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DOI:
10.1631/FITEE.2200445
CLC number:
V446+.9
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On-line Access:
2024-05-06
Received:
2022-10-09
Revision Accepted:
2024-05-06
Crosschecked:
2023-03-14