The design of a prototype redundant valve drive electronics assembly (VDA) is discussed. The VDA is used as part of the modular attitude and control system for the electrical actuation and monitoring of spacecraft reaction control assemblies (RCA). The main function of the VDA is to decode all the information issued from the adaptive control electronics (ACE) in order to actuate or monitor the required RCA component. The power switching amplifiers, used to connect the power bus on the RCA component to be actuated, are integrated into thick film hybrid circuits. Octocouplers provide the ground isolation required between the power bus and the VDA internal electronics. The main goal is to minimize and optimize the number of components, power consumption, weight, and volume.


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    Title :

    Valve Drive Electronics Assembly (VDA)


    Contributors:
    M. Aulagnon (author) / M. Duban (author) / M. Reinhalter (author)

    Publication date :

    1978


    Size :

    131 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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