This paper presents a proposed on-board Telescope Protection Algorithm (TPA) for the Space Infrared Telescope Facility (SIRTF). This TPA consists of hardware and software capable of performing both fail-operational and fail-safe modes of operation. In the fail-operational mode, each ephemeris load and slew/dwell command sequence is checked on-board before use. The slew command monitor detects unallowable slew/dwell commands and transfers control to an algorithm which slews to and maintains a safe telescope orientation while preserving precise attitude determination and control. This fail-operational mode is also given the authority to autonomously restart the slew/dwell sequence at a point beyond the faulty command. The fail-safe system consists of software and hardware which detects impending Earth, moon, or sun avoidance zone violations and activates of a backup hardware safe hold mode. The subject TPA and relevant sensor complement were designed for the SIRTF mission; however, this system can easily be used as a basis for failure detection and correction in a wide range of other missions.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Telescope protection algorithm for the space infrared telescope facility


    Additional title:

    Teleskopschutz-Algorithmus fuer die Weltraum-Infrarotteleskop-Anlage


    Contributors:
    Class, B.F. (author) / Wiltsee, C. (author) / Welch, R.V. (author)

    Published in:

    AIAA-Papers ; Jan ; 1-10


    Publication date :

    1988


    Size :

    10 Seiten, 19 Bilder, 5 Tabellen, 6 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Telescope protection algorithm for the Space Infrared Telescope Facility

    CLASS, B. / WELCH, R. / WILTSEE, C. | AIAA | 1988



    The Space Infrared Telescope Facility (SIRTF)

    Whitten, M. / Tenerelli, D. / Rieke, G. et al. | NTRS | 1998


    SIRTF - the Space Infrared Telescope Facility

    Werner, M.W. | Online Contents | 2004


    SIRTF, the Space Infrared Telescope Facility

    Simmons, Larry L. | NTRS | 1999