A Study on Automatic Power Control Method Applied in Astronaut Extravehicular Activity

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 571)


The space station mission faces the data interaction requirements between the space station and multiple extravehicular astronauts. The traditional wireless communication mode with constant transmitting power will cause the interference and incompatibility of communication due to the different positions of the extravehicular astronauts. In order to ensure the communication link stability of all extravehicular astronauts, an automatic power control method is proposed. The extravehicular communication device located in the space station receives the real-time data of all extravehicular astronauts, and the signal to noise ratio is estimated. According to the evaluation results, the power is automatically controlled by the two ways of outer loop and inner loop. Finally, the signal to noise ratio of all the astronauts received by the extravehicular communication device is the same, ensuring the quality of extravehicular communication. The method is verified by building the testbed and carrying out experiment, and the result shows that the multiple signal to noise ratio received is almost the same, and the reliability for multiple extravehicular activity is improved.


Space station Communication system of astronaut extravehicular activity Reversed signal Automatic power control 


  1. 1.
    Yutao Hao, Liu Baoguo, Wang Ruijun et al (2014) Research on TT&C system in international space station. Manned Spaceflight 20(2):165–172 (in Chinese)Google Scholar
  2. 2.
    Zhi S, Bainan Z, Teng P et al (2009) Research and development of Shenzhou-7. Manned Spaceflight 15(2):16–21, 48 (in Chinese)Google Scholar
  3. 3.
    Chen Jindun, Liu Weibo, Chen Shanguang (2009) The system design and flight application of astronaut EVA in Shenzhou VII mission. Manned Spaceflight 15(2):1–9MathSciNetGoogle Scholar
  4. 4.
    Xiao Yu, Ma Xiaobing, Zhongqiu Gou (2010) Failure mode and countermeasure design and implement for Shenzhou spaceship’s extravehicular activity. Spacecraft Eng 19(6):56–60 (in Chinese)Google Scholar
  5. 5.
    Zhihao Pang (2008) Development of technologies of extravehicular activities. Sci Technol Rev 26(20):21–27 (in Chinese)Google Scholar
  6. 6.
    Zhu Guangchen, Shijin Jia (2009) The ground verification of spacecraft EVA functions. Manned Spaceflight 15(3):48–53 (in Chinese)Google Scholar
  7. 7.
    Shi Yunchi (2011) Space to space communication subsystem manned spaceflight and its key technology. Aerosp Shanghai 28(6):38–42 (in Chinese)Google Scholar
  8. 8.
    Cheng Qinglin, Liang Hong, Wu Yijie et al (2014) The design and implementation of multi-mode receiver for rendezvous and docking in space. Manned Spaceflight 20(1):58–64 (in Chinese)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Institute of Manned Space System Engineering, China Academy of Space TechnologyBeijingChina

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