The Far Ultraviolet Spectroscopic Explorer (FUSE) is equipped with two ring laser gyros on each of the spacecraft body axes. In May 2001 one gyro failed. It is anticipated that all of the remaining gyros will fail, based on intensity warnings. In addition to the gyro failure, two of four reaction wheels failed in late 2001. The spacecraft control now relies heavily on magnetic torque to perform the necessary science maneuvers and hold on target. The only sensor consistently available during slews is a magnetometer. This paper documents the testing and development of magnetometer-based gyroless attitude and rate estimation algorithms for FUSE. The results of two approaches are presented, one relies on a kinematic model for propagation, a method used in aircraft tracking. The other is a pseudo-linear Kalman filter that utilizes Euler's equations in the propagation of the estimated rate. Both algorithms are tested using flight data collected over a few months after the reaction wheel failure. Finally, the question of closed-loop stability is addressed. The ability of the controller to meet the science slew requirements, without the gyros, is analyzed.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Testing of Gyroless Estimation Algorithms for the FUSE Spacecraft


    Beteiligte:
    R. Harman (Autor:in) / J. Thienel (Autor:in) / Y. Oshman (Autor:in)

    Erscheinungsdatum :

    2003


    Format / Umfang :

    18 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Testing of Gyroless Estimation Algorithms for the Fuse Spacecraft

    Harman, R. / Thienel, J. / Oshman, Yaakov | NTRS | 2004


    Testing of Gyroless Estimation Algorithms for the FUSE Spacecraft

    Thienel, Julie / Harman, Rick / Oshman, Yaakov | NTRS | 2003


    Testing of Gyroless Estimation Algorithms for the FUSE Spacecraft

    Harman, Rick / Thienel, Julie / Oshman, Yaakov | NTRS | 2003


    Testing of Gyroless Estimation Algorithms for the FUSE Spacecraft

    Thienel, Julie / Harman, Rick / Oshman, Yaakov | NTRS | 2003


    Testing of Gyroless Estimation Algorithms for the Fuse Spacecraft

    R. Harman / J. Thienel / Y. Oshman | NTIS | 2004