The Shuttle is the first launch system deployed by NASA with full redundancy in the on-board computer systems. Fault-tolerance, i.e., restoring to a backup with less capabilities, was the method selected for Apollo. The Gemini capsule was the first to carry a computer, which also served as backup for Titan launch vehicle guidance. Failure of the Gemini computer resulted in manual control of the spacecraft. The Apollo system served vehicle flight control and navigation functions. The redundant computer on Skylab provided attitude control only in support of solar telescope pointing. The STS digital, fly-by-wire avionics system requires 100 percent reliability. The Orbiter carries five general purpose computers, four being fully-redundant and the fifth being soley an ascent-descent tool. The computers are synchronized at input and output points at a rate of about six times a second. The system is projected to cause a loss of an Orbiter only four times in a billion flights.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Achieving reliability - The evolution of redundancy in American manned spacecraft computers


    Beteiligte:
    Tomayko, J. E. (Autor:in)

    Erscheinungsdatum :

    1985-12-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Subsystem reliability in a manned spacecraft.

    Corprew, R. / Nekrasov, P. | NTRS | 1968


    Manned Spacecraft

    A. N. Ponomarev | NTIS | 1989



    Sealing manned spacecraft

    Trout, Jr., O.F. | Engineering Index Backfile | 1963


    SEALING MANNED SPACECRAFT

    Trout, O. T. | NTRS | 1963