The design concept developed for the pointing system of the High-Resolution Imaging Spectrometer (HIRIS) which will be flown on one of NASA's Earth observing system platforms is presented. The instrument is an F 5.4-aperture spectrometer with a focal length of 1222 mm, and it uses a precision two-axis gimballed mirror pointing system to image and track targets. Pointing accuracy of better than 585 arcsec (peak-to-peak), and pointing jitter of less than 2.65 arcsec in 33 ms are ensured through the use of gimbal position and basebody rate sensors. A state-space controller implemented with a digital computer is used to provide a position loop bandwidth of 1 Hz and a rate loop bandwidth of 7 Hz. An overview of the system design and flight hardware is given, the development of the controller architecture is addressed, and a simulation assessment of the pointing system that takes into consideration issues such as nonlinear effects, sensor noise, and noncollocated sensors and actuators in a flexible structure is discussed.


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    Titel :

    Precision pointing control for an orbital Earth observing system


    Weitere Titelangaben:

    Regelung hoher Genauigkeit für die Ausrichtung der Satellitenbahn eines Erdbeobachtungssystems


    Beteiligte:
    Robeck, L.S. (Autor:in) / Rathbun, D.B. (Autor:in) / Lehman, D.H. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1991


    Format / Umfang :

    7 Seiten, 5 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





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