Analysis of the rigid solar array, SA-3, design showed that the pointing control system stability margin requirements would be violated because of the modal characteristics of the SA-3 fundamental bending modes. A damping of 1.5% of critical of the SA-3 fundamental bending modes, at the HST system level, is needed to meet the stability margin requirements. A damper, consisting of a titanium flexure and viscoelastic damping material, has been designed, built, and tested, and is an integral part of the SA-3 mast. The viscoelastic material properties are temperature-sensitive, and direct complex stiffness testing was performed to characterize the frequency- and temperature-dependent behavior of the damper. Fixed-base modal testing showed that the optimized damper is expected to provide modal damping of at least 2.25% of critical (fixed base and extrapolated to zero excitation force levels) over the temperature range of 0/spl deg/C to 25/spl deg/C.


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    Titel :

    Hubble Space Telescope solar array damper for improving control system stability


    Beteiligte:
    Anandakrishnan, S.M. (Autor:in) / Connor, C.T. (Autor:in) / Lee, S. (Autor:in) / Shade, E. (Autor:in) / Sills, J. (Autor:in) / Maly, J.R. (Autor:in) / Pendleton, S.C. (Autor:in)


    Erscheinungsdatum :

    01.01.2000


    Format / Umfang :

    1220966 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Hubble Space Telescope Solar Array Damper For Improving Control System Stability

    Anandalrosjmam, S. M. / Connor, C. T. / Lee, S. et al. | British Library Conference Proceedings | 2000


    Solar-array-induced disturbance of the Hubble Space Telescope pointing system

    Foster, Carlton L. / Tinker, Michael L. / Nurre, Gerald S. et al. | AIAA | 1995