A Score Function for Optimizing the Cycle-Life of Battery-Powered Embedded Systems

Erik Ramsgaard Wognsen, Boudewijn R. Haverkort, Marijn Jongerden, René Rydhof Hansen, Kim Guldstrand Larsen

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    18 Citations (Scopus)
    598 Downloads (Pure)

    Abstract

    An ever increasing share of embedded systems is powered by rechargeable batteries. These batteries deteriorate with the number of charge/discharge cycles they are subjected to, the so-called cycle life. In this paper, we propose the wear score function to compare and evaluate the relative impact of usage (charge and discharge) profiles on cycle life. The wear score function can not only be used to rank different usage profiles, these rankings can also be used as a criterion for optimizing the overall lifetime of a battery-powered system. We perform such an optimization on a nano-satellite case study provided by the company GomSpace. The scheduling of the system is modelled as a network of (stochastic) weighted timed games. In a stochastic setting, exact optimization is very expensive. However, the recently introduced Uppaal Stratego tool combines symbolic synthesis with statistical model checking and reinforcement learning to synthesize near-optimal scheduling strategies subject to possible hard timing-constaints. We use this to study the trade-off between optimal short-term dynamic payload selection and the operational life of the satellite.
    Original languageEnglish
    Title of host publicationFormal Modeling and Analysis of Timed Systems
    Subtitle of host publication13th International Conference, FORMATS 2015, Madrid, Spain, September 2-4, 2015, Proceedings
    EditorsSriram Sankaranarayanan, Enrico Vicario
    Place of PublicationCham
    PublisherSpringer
    Pages305-320
    Number of pages16
    ISBN (Electronic)978-3-319-22975-1
    ISBN (Print)978-3-319-22974-4
    DOIs
    Publication statusPublished - Sept 2015
    Event13th International Conference on Formal Modeling and Analysis of Timed Systems, FORMATS 2015 - Universidad Complutense de Madrid, Madrid, Spain
    Duration: 2 Sept 20154 Sept 2015
    Conference number: 13
    http://formats2015.unifi.it/

    Publication series

    NameLecture Notes in Computer Science
    PublisherSpringer Verlag
    Volume9268
    ISSN (Print)0302-9743
    ISSN (Electronic)1611-3349

    Conference

    Conference13th International Conference on Formal Modeling and Analysis of Timed Systems, FORMATS 2015
    Abbreviated titleFORMATS
    Country/TerritorySpain
    CityMadrid
    Period2/09/154/09/15
    Internet address

    Keywords

    • EC Grant Agreement nr.: FP7/318490
    • Cycle-life battery
    • EC Grant Agreement nr.: FP7/2007-2013
    • Uppaal stratego
    • Battery aging
    • n/a OA procedure

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