Sierra Nevada Corporation’s Space Systems performed bearing life testing for the Scan Mirror Motor/Encoder Assembly (SMMA), part of the Scan Mirror Assembly on-board the Aerosol Polarimetry Sensor (APS) on the NASA Glory Spacecraft. The baseline bearing life test duration extended beyond the launch date for the Glory Spacecraft; a risk that the program was willing to undertake with the understanding that if any anomalies or failures occurred before the required life was achieved, then the mission objectives or operating profile could be modified on orbit to take those results into account. Even though the Glory Spacecraft failed to reach orbit during its launch in March of 2011, the bearing life testing was continued through a mutual understanding of value between Sierra Nevada Corporation and our customer; with a revised goal of testing to failure rather than completing a required number of life cycles. Life testing thus far has not only exceeded the original mission required life, but has also exceeded the published test data for Cumulative Degradation Factor (CDF) from NASA/CR-2009-215681. Many lessons were learned along the way regarding long life testing. The bearing life test has been temporarily suspended due to test support equipment issues.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Extended Life Testing of Duplex Ball Bearings


    Beteiligte:

    Kongress:

    Aerospace Mechanisms Symposium ; 2016 ; Santa Clara, CA, United States



    Erscheinungsdatum :

    2016-05-04


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Ball bearings

    Engineering Index Backfile | 1938


    BALL BEARINGS

    HESS, HENRY | SAE Technical Papers | 1906


    Life improvement of ball bearings for motorcycles

    Hoshino,T. / Goto,M. / Koyo Seiko ,JP | Kraftfahrwesen | 1989


    Life improvement of ball bearings for motorcycles

    Hoshino, T. / Goto, M. | Tema Archiv | 1989


    Ball bearings

    Engineering Index Backfile | 1938