Space systems are characterized by a low-intensity process noise resulting from uncertain forces and moments. In many cases, their scalar measurement channels can be assumed to be independent, with one-dimensional internal dynamics. The nominal operation of these systems can be severely damaged by faults in the sensors. A natural method that can be used to yield fault tolerant estimates of such systems is the interacting multiple model (IMM) filtering algorithm, which is known to provide very accurate results. However, having been derived for a general class of systems with switching parameters, the IMM filter does not utilize the independence of the measurement errors in different channels, nor does it exploit the fact that the process noise is of low intensity. Thus, the implementation of the IMM in this case is computationally expensive. A new estimation technique is proposed herein, that explicitly utilizes the aforementioned properties. In the resulting estimation scheme separate measurement channels are handled separately, thus reducing the computational complexity. It is shown that, whereas the IMM complexity is exponential in the number of fault-prone measurements, the complexity of the proposed technique is polynomial. A simulation study involving spacecraft attitude estimation is carried out. This study shows that the proposed technique closely approximates the full-blown IMM algorithm, while requiring only a modest fraction of the computational cost.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Efficient fault tolerant estimation using the IMM methodology


    Beteiligte:
    Rapoport, I. (Autor:in) / Oshman, Y. (Autor:in)


    Erscheinungsdatum :

    01.04.2007


    Format / Umfang :

    1493077 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Efficient Fault Tolerant Estimation Using the IMM Methodology

    Rapoport, Ilia / Oshman, Yaakov | AIAA | 2004



    Efficient fault tolerant estimation using the IMM methodology

    Rapoport, I. / Oshman, Y. | Tema Archiv | 2007


    AIAA-2004-5417 Efficient Fault Tolerant Estimation Using the IMM Methodology

    Oshman, Y. / Rapoport, I. | British Library Conference Proceedings | 2004


    Fault-Tolerant Clock Synchronization Validation Methodology

    Ricky W Butler / Daniel L Palumbo / Sally C Johnson | NTRS | 1987