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Mekatronik Mühendisliği Bölümü Yayın Koleksiyonu

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Browsing Mekatronik Mühendisliği Bölümü Yayın Koleksiyonu by Author "271229"

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    Conference Object
    Citation Count: Khalid, H.M.; Kirik, M.S.; Schmidt, K.W., "Abstraction-Based Supervisory Control for Recon-Gurable Manufacturing Systems?", Ifac Proceedings Volumes (Ifac-Papersonline), Vol. 4, No. 1, pp. 157-162, (2013).
    Abstraction-Based Supervisory Control for Recon-Gurable Manufacturing Systems?
    (2013) Khalid, Harith M.; Kırık, Mustafa Sancay; Schmidt, Klaus Werner; 271229
    Reconfiguration control for discrete event systems (DES) is concerned with the realization of different system configurations by modification of the supervisory control loop. In this paper, we study the reconfiguration supervisor design for reconfigurable manufacturing systems (RMS) that comprise multiple components. We construct a modular supervisor for each configuration and system component in order to realize each active configuration and to quickly change between configurations. Different from the existing literature that is focused on monolithic design, our method is abstraction-based, and, hence applicable to large-scale DES.
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    Article
    Citation Count: Schmidt, Klaus; Schmidt, Ece G. "Optimal Message Scheduling for the Static Segment of FlexRay", 2010 Ieee 72nd Vehicular Technology Conference Fall, (2010).
    Optimal Message Scheduling for the Static Segment of Flexray
    (IEEE, 2010) Schmidt, Klaus Werner; Schmidt, Ece G.; 271229
    In this paper, we study the scheduling of periodic messages in the static segment of the FlexRay protocol. Our approach is based on two performance metrics. Similar to previous work, we seek to allocate a minimum number of frame IDs (FIDs) in the static segment. In addition, different from existing work, we want to minimize the message jitter, i.e., the deviation of the message transmission from the required periodicity. To this end, we first derive analytical expressions that quantify the FID allocation and the jitter, and then formulate a linear integer programming problem whose solution is the desired message schedule. An example illustrates our schedule optimization.
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    Publication
    Citation Count: Schmidt, Klaus; Schmidt, Ece G. "Schedulability Analysis and Message Schedule Computation for the Dynamic Segment of FlexRay",2010 Ieee 72Nd Vehicular Technology Conference Fall, (2010).
    Schedulability Analysis and Message Schedule Computation for the Dynamic Segment of Flexray
    (IEEE, 2010) Schmidt, Klaus Werner; Schmidt, Ece G.; 271229
    In this paper, we perform the schedulability analysis and schedule computation for sporadic real-time messages in the dynamic segment of the FlexRay protocol. We first formulate a linear integer programming problem that allows to determine if a given message schedule is feasible, i.e., the worst-case delay of each message is smaller than its deadline. Then, we develop a heuristic algorithm that enables the efficient computation of feasible schedules. Our results are illustrated by an experimental setup with three FlexRay nodes.