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    • Reliability design for realization of Panel Extension Satellite (PETSAT)

    Paper number

    IAC-06-B5.7.07

    Author

    Mr. Okada Takanori, Astro-Technology SOHLA, Japan

    Coauthor

    Mr. Kanichi Koyama, Astro-Technology SOHLA, Japan

    Coauthor

    Ms. Chisato Kobayashi, Astro-Technology SOHLA, Japan

    Coauthor

    Prof. Shinichi Nakasuka, University of Tokyo, Japan

    Year

    2006

    Abstract
    Panel Extension Satellite (PETSAT), has pluggable design concept, is made of several "Functional Panels" each of which has a special dedicated function. By connecting these panels by reliable connection mechanism in "plug-in" fashion, the total integrated system as a whole has a satellite function. PETSAT has four key interface, mechanical, thermal, electrical, and information interface. Communication between panels is essential for PETSAT. The information line should be very reliable and should have enough communication capacity to deal with the flow of house keeping data as well as mission data. Information line between panel has high reliable communication standard such as CAN (Control Area Network) and PETSAT has two communication line.
Each panel should have a certain level microprocessor for controlling this information traffic as well as managing the information flow inside the panel. The component to have this feature, has called Command \& Data handling module. Command \& Data handling module has two panel controllers. Two panel controllers constitute double-module-redundancy under monitoring module called “CPU combiner”.
CPU combiner places between panel controllers and other components, and compares two panel controller conditions. To combine two panel controllers, CPU combiner has four feature. (1)Compare panel controllers output and detect mismatch of output. (2)Relay data and command from other component to panel controller. (3)Watch irregular stop of panel controller. (4)Reset controller when detect operation error.
Because data handling feature does not require continuous work strictly, C \& DH handling module has 1-fail-safe reliability, not 1-fail-available.
    Abstract document

    IAC-06-B5.7.07.pdf

    Manuscript document

    IAC-06-B5.7.07.pdf (🔒 authorized access only).

    To get the manuscript, please contact IAF Secretariat.