TY - JOUR
T1 - Design and in-orbit verification of data storage system for nano-pico satellites
AU - Liu, Guanghui
AU - Zhou, Jun
AU - Sun, Fei
N1 - Publisher Copyright:
© 2018, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
PY - 2018/2/28
Y1 - 2018/2/28
N2 - A storage strategy based on “three-level data storage, three-mode fault-tolerant structure” is proposed to improve the performance and the reliability of the data storage system for nano-pico satellites. Firstly, the storage device is selected based on the analysis of the onboard storage media and fault characteristics. After analyzing the error sources of the file system, a scheme combining the ECC error correction, the redundancy backup and the current protection is applied to improve the reliability of the system. The file space is pre-allocated and a ring data storage structure is established to reduce errors and decrease the operating complexity for the file system. Finally, taking the advantages of RAM, FRAM and SD card, a three-level data storage method is utilized to improve the storage speed and the fault tolerance. writing speed increases by about 4.7 times when the data size is 1 MB, and the SDC abnormality or abrupt power-off of the system can not affect the system; in addition, the fault switching time is less than or equal to 10 ms when the fault switching time is less than or equal to 1 frame. In orbit operation process, all the FS, files and the storage media work well. The ground test and the in-orbit operation show that the proposed data storage strategy is feasible, and the system reliability and the performance of data reading and writing can meet the mission requirements of satellite system.
AB - A storage strategy based on “three-level data storage, three-mode fault-tolerant structure” is proposed to improve the performance and the reliability of the data storage system for nano-pico satellites. Firstly, the storage device is selected based on the analysis of the onboard storage media and fault characteristics. After analyzing the error sources of the file system, a scheme combining the ECC error correction, the redundancy backup and the current protection is applied to improve the reliability of the system. The file space is pre-allocated and a ring data storage structure is established to reduce errors and decrease the operating complexity for the file system. Finally, taking the advantages of RAM, FRAM and SD card, a three-level data storage method is utilized to improve the storage speed and the fault tolerance. writing speed increases by about 4.7 times when the data size is 1 MB, and the SDC abnormality or abrupt power-off of the system can not affect the system; in addition, the fault switching time is less than or equal to 10 ms when the fault switching time is less than or equal to 1 frame. In orbit operation process, all the FS, files and the storage media work well. The ground test and the in-orbit operation show that the proposed data storage strategy is feasible, and the system reliability and the performance of data reading and writing can meet the mission requirements of satellite system.
KW - Data storage
KW - FS
KW - Nano-pico satellites
KW - SDC
KW - Three-level data storage
UR - https://www.scopus.com/pages/publications/85042879627
U2 - 10.11918/j.issn.0367-6234.201706176
DO - 10.11918/j.issn.0367-6234.201706176
M3 - 文章
AN - SCOPUS:85042879627
SN - 0367-6234
VL - 50
SP - 178
EP - 183
JO - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
JF - Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology
IS - 2
ER -