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    Item type:Publication, Access status: with files ,
    Ein Bewertungsansatz zur Analyse von Zustandsmanagementsystemen in Verkehrsflugzeugen unter Berücksichtigung neuer Instandhaltungskonzepte
    (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), 2019)
    Hölzel, Nico
    ;
    Gollnick, Volker
    This research study deals with the technology assessment of health management systems and condition-based/predictive maintenance concepts for future commercial aircraft. A model for a discrete-event-simulation of aircraft operation, failure and maintenance events and the impacts of diagnostic and prognostic technologies in the aircraft life cycle with the integration of an optimization approach for the dynamic maintenance planning is developed. For the evaluation of the economic benefit from an operator's perspective, a cost-benefit analysis based on the discounted cash flow method is applied. In an application case, the operational and economic potential of health management systems is demonstrated by the example of a short/medium-haul aircraft.
    Publicationtype: Doctoral Thesis
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    Item type:Publication, Access status: without files ,
    System analysis of prognostics and healthmanagement systems for future transportaircraft
    (2012-09-15)
    Gollnick, Volker
    ;
    Hölzel, Nico
    ;
    Schilling, Thomas
    ;
    Neuheuser, Tom
    This paper provides a lifecycle analysis of theuse of prognostic systems in future or presentaircraft. By simulating aircraft operation andmaintenance and modeling resulting costs andrevenues it gives a profound economicassessment of a technology implementation. The proposed method uses component specific failure distribution functions derived from in- service data to model component failurebehavior and includes performance levels of prognostic systems to account for imperfect sensor systems or prognostic algorithms.The study demonstrates that Prognostics and Health Management (PHM) systems for a selected aircraft system can enable a significantreduction of unscheduled events, leading toadditional aircraft utilization and an increase innet present value (NPV) of up to 0.48 % in caseof a perfect PHM system. It is shown that many factors influence whether the implementation of PHM for a specific system may be beneficial in the end.
    Publicationtype: Conference Paper
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