A redundant and integrated avionics for 12U CubeSat

Guanghui Liu, Jun Zhou, Jian Guo

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

In this paper, a redundant and integrated avionics for 12U CubeSat is presented. The main innovation is to propose a method to enhance system reliability and fault tolerance based on the COTS(Commercial Off-The-Shelf) devices, as well as to deal with system recoverability for unknown failures without changing the original system hardware. A multi-node architecture based on COTS devices and standard I2C bus is designed considering low cost, modularization, simplification and high-reliability. In order to avoid the I2C bus stuck issue, a bus recovery technology generating 16 clock pulses on the I2C bus is proposed. The cold redundant strategy is utilized on the devices that have no flight heritage. The OBC employs a heterogeneous complementary dual-processor method. A high-speed processor acts the main processor for the normal command data management and attitude control tasks. A high reliability, low-speed processor works as the backup processor for monitoring and fault-tolerant operations, which can protect the system with minimum running cost when the main processor fails. The proposed avionics has been developed and successfully demonstrated on the world's first 12U CubeSat "Star of AoXiang", which was launched on June 25, 2016. the avionics worked without issues until atmospheric re-entry after 99 days in orbit. The in-orbit results of this avionics are presented in this paper.

Original languageEnglish
Title of host publication68th International Astronautical Congress, IAC 2017
Subtitle of host publicationUnlocking Imagination, Fostering Innovation and Strengthening Security
PublisherInternational Astronautical Federation, IAF
Pages6121-6127
Number of pages7
Volume9
ISBN (Print)9781510855373
Publication statusPublished - 1 Jan 2017
Event68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017: Unlocking Imagination, Fostering Innovation and Strengthening Security - Adelaide, Australia
Duration: 25 Sep 201729 Sep 2017
Conference number: 68
http://www.iafastro.org/events/iac/iac-2017/

Conference

Conference68th International Astronautical Congress: Unlocking Imagination, Fostering Innovation and Strengthening Security, IAC 2017
Abbreviated titleIAC 2017
CountryAustralia
CityAdelaide
Period25/09/1729/09/17
Internet address

Keywords

  • 12U CubeSat
  • I2C bus lockup revcover
  • Integrated avionics
  • OBC
  • Star of AoXiang

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