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On-line Access: 2012-01-19

Received: 2011-03-31

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Journal of Zhejiang University SCIENCE C 2012 Vol.13 No.2 P.83-89


Design and implementation of the highly-reliable, low-cost housekeeping system in the ZDPS-1A pico-satellite

Author(s):  Yu Zhang, Yang-ming Zheng, Mu Yang, Hui Li, Zhong-he Jin

Affiliation(s):  College of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zymsun2002@zju.edu.cn

Key Words:  ZDPS-1A, Pico-satellite, Reliability, Housekeeping system (HKS), On-board computer (OBC), Warm backup, Fault tolerance

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Yu Zhang, Yang-ming Zheng, Mu Yang, Hui Li, Zhong-he Jin. Design and implementation of the highly-reliable, low-cost housekeeping system in the ZDPS-1A pico-satellite[J]. Journal of Zhejiang University Science C, 2012, 13(2): 83-89.

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T1 - Design and implementation of the highly-reliable, low-cost housekeeping system in the ZDPS-1A pico-satellite
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The ZDPS-1A pico-satellite designed in Zhejiang University with a mass of 3.5 kg and a power consumption of less than 3.5 W is the smallest satellite in China up to now. The housekeeping system (HKS) is the core part of ZDPS-1A. The reliability of HKS has an important influence on the safety of the satellite. Traditional fault-tolerant methods do not apply to ZDPS-1A due to such pico-satellite characteristics as light weight, compactness in size, energy saving, and high integration. This paper deals with a highly-reliable, low-cost design for HKS using industrial devices. The reliable strategies of HKS include a dual modular redundancy scheme, CPU warm backup, a static triple modular redundancy scheme, and two-level watchdogs. Recursive experiments, special tests, and environmental tests show that this system meets the design target. This design has already been applied to ZDPS-1A, which was launched to execute in-orbit tasks on Sept. 22, 2010. To date, the satellite has been in a proper state for more than 15 months.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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