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Schmıdt, Klaus Werner

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https://hdl.handle.net/20.500.12416/9294
Name Variants
Schmidt, Klaus W.
Schmidt, Klaus
Schmidt, Klaus Werner
Schmidt, K.W.
Schmidt, K.
Schmidt, Klaus Werner
Schmidt, Klaus Werner
Schmidt, Klaus Werner
Job Title
Doç. Dr.
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Main Affiliation
06.08. Mekatronik Mühendisliği
06. Mühendislik Fakültesi
01. Çankaya Üniversitesi
06.08. Mekatronik Mühendisliği
Mekatronik Mühendisliği
06. Mühendislik Fakültesi
01. Çankaya Üniversitesi
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Former Staff
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Sustainable Development Goals

13

CLIMATE ACTION
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8

DECENT WORK AND ECONOMIC GROWTH
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3

GOOD HEALTH AND WELL-BEING
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2

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15

LIFE ON LAND
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17

PARTNERSHIPS FOR THE GOALS
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LIFE BELOW WATER
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QUALITY EDUCATION
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SUSTAINABLE CITIES AND COMMUNITIES
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CLEAN WATER AND SANITATION
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INDUSTRY, INNOVATION AND INFRASTRUCTURE
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RESPONSIBLE CONSUMPTION AND PRODUCTION
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PEACE, JUSTICE AND STRONG INSTITUTIONS
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Scholarly Output

71

Articles

25

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7831/650

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WoS Citation Count

404

Scopus Citation Count

623

WoS h-index

12

Scopus h-index

14

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WoS Citations per Publication

5.69

Scopus Citations per Publication

8.77

Open Access Source

15

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JournalCount
IFAC Proceedings Volumes (IFAC-PapersOnline)5
2017 25th Signal Processing And Communications Applications Conference (SIU)4
IEEE Transactions on Automatic Control3
2017 25th Signal Processing and Communications Applications Conference, SIU 2017 -- 25th Signal Processing and Communications Applications Conference, SIU 2017 -- 15 May 2017 through 18 May 2017 -- Antalya -- 1287033
2012 20th Signal Processing and Communications Applications Conference, SIU 2012, Proceedings -- 2012 20th Signal Processing and Communications Applications Conference, SIU 2012 -- 18 April 2012 through 20 April 2012 -- Fethiye, Mugla -- 907863
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Now showing 1 - 10 of 71
  • Thumbnail Image
    Conference Object
    Citation - WoS: 2
    Citation - Scopus: 4
    Offset Assignment on Controller Area Network: Improved Algorithms and Computational Evaluation
    (Ieee, 2017) Batur, Ahmet; Schmidt, Klaus Werner; Schmidt, Ece Guran
    The basic requirement for the design of the Controller Area Network (CAN) for in-vehicle communication is to guarantee that the worst-case response time (WCRT) of each message is smaller than their specified deadline. In addition, it is desired to achieve small WCRTs that leave sufficient slack to the message deadline. In order to address the specified objectives, the idea of offset scheduling has been introduced. In this setting, messages on CAN are released with offsets in order to avoid message bursts that lead to undesirably large response times. In order to use offset scheduling efficiently, it is required to assign a suitable offset to each message. To this end, a load distribution (LD) algorithm is proposed in the existing literature. The main contribution of this paper is the development of new algorithms for offset assignment on CAN. Evaluating different example scenarios, the paper shows that the proposed algorithms outperform the existing LD algorithm in most of the cases.
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    Conference Object
    Computation of Reduced Diagnosers for the Fault Diagnosis of Discrete Event Systems
    (2014) Kart, Bora Eser; Schmidt, Klaus
    Many complex systems in different areas such as manufacturing, telecommunications or transportation can be modeled as discrete event systems (DES). In this paper, we consider the fault diagnosis for DES which is concerned with detecting fault occurrences in a DES within a bounded number of event occurrences by a diagnoser automaton. Hereby, such diagnoser is able to observe a subset of the system events and the maximum required number of event occurrences until a fault detection is denoted as the worst case detection delay (WCDD). The main contribution of the paper is an approach for reducing the number of required observations for fault diagnosis without increasing the WCDD. As a result, it is possible to determine a diagnoser with a small size which is essential in practical applications. We first develop an algorithm for computing the WCDD and then adapt an approach for the reduction of the observable event set in order to obtain a reduced diagnoser. The application of our method to a communication system example demonstrates its practicability.
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    Conference Object
    Citation - Scopus: 1
    Fuzzy Hybrid Systems Modeling With Application in Decision Making and Control
    (2012) Boutalis, Y.; Moor, T.; Schmidt, K.
    Hybrid Systems are systems containing both discrete event and continuous variable components. Many recent contributions address crisp situations, where ambiguity or subjectivity in the measured data is absent. In this paper, we propose Fuzzy Hybrid Systems to account for inaccurate measurements and uncertain dynamics. We present a strategy to determine the most appropriate control actions in a sampled data setting. The proposed approach is based on three basic steps that are performed in each sampling period. First, the current discrete fuzzy state of the system is determined by a sensor evaluation. Next, the future discrete fuzzy state is predicted for the possible control actions and the best action, in respect to desired continuous states, is selected. Finally, the decision is cross-evaluated by a limited horizon prediction of the continuous system variables. The proposed method is explained and demonstrated for a variation of the a well-known two-tank scenario. © 2012 IEEE.
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    Conference Object
    Citation - WoS: 1
    Citation - Scopus: 1
    A Fast and Optimal Static Segment Scheduling Method for Flexray V3.0
    (Institute of Electrical and Electronics Engineers Inc., 2017) Cakmak, C.; Schmidt, E.G.; Schmidt, K.W.
    We propose a novel and fast frame scheduling method for the Static Segment (SS) of the new in-vehicle network standard FlexRay v3.0 in this paper. The proposed methods assigns frames to the SS using the minimum number of time slots based on an Integer Linear Programming formulation. Different from the existing method in the literature, the proposed method computes optimal frame schedules within miliseconds. © 2017 IEEE.
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    Article
    Lane Change Scheduling for Autonomous Vehicles
    (2016) Atagoziyev, Maksat; Schmidt, Klaus W.; Schmidt, Ece G.
    The subject of this paper is the coordination of lane changes of autonomous vehicles on a two-lane road segment before reaching a given critical position. We first develop an algorithm that performs a lane change of a single vehicle in the shortest possible time. This algorithm is then applied iteratively in order to handle all lane changes required on the considered road segment while guaranteeing traffic safety. Various example scenarios illustrate the functionality of our algorithm.
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    Book Part
    A fast and optimal static segment scheduling method for FlexRay v3.0
    (IEEE, 2017) Çakmak, Cumhur; Schmidt, Ece Güran; Schmidt, Klaus Werner
    We propose a novel and fast frame scheduling method for the Static Segment (SS) of the new in-vehicle network standard FlexRay v3.0 in this paper. The proposed methods assigns frames to the SS using the minimum number of time slots based on an Integer Linear Programming formulation. Different. from the existing method in the literature, the proposed method computes optimal frame schedules within miliseconds.
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    Article
    Citation - WoS: 17
    Citation - Scopus: 23
    Voronoi Boundary Visibility for Efficient Path Planning
    (Ieee-inst Electrical Electronics Engineers inc, 2020) Al-Dahhan, Mohammed Rabeea Hashim; Schmidt, Klaus Werner
    The subject of this paper is the computation of paths for mobile robots that navigate from a start position to a goal position in environments with static obstacles. Specifically, we focus on paths that are represented by straight lines. Such paths can for example directly be followed by omni-directional robots or can be used as an initial solution for path smoothing. In this context, the most common performance metrics are the path length, the obstacle clearance and the computation time. In this paper, we develop a new path planning algorithm that addresses all the stated performance metrics. Our method first determines all possible connections between the start position and goal position along the edges of the generalized Voronoi diagram (GVD) of a given obstacle map. The shortest connections are then refined using a balanced method for creating shortcuts along existing waypoints and introducing new waypoints in order to cut corners. As an important feature, our method reduces the number of required waypoints by iteratively adding new waypoints and then removing unnecessary waypoints along solution paths. Moreover, our method takes into account multiple start-goal connections, since the shortest start-goal connection along the edges of the GVD might not lead to the shortest solution path. A comprehensive computational evaluation for a large number of maps with different properties shows that the proposed method outperforms sampling-based algorithms such as Probabilistic Roadmaps (PRM) and exact methods such as Visibility Graphs (VG) by computing close-to-optimal solution paths with a specified minimum obstacle clearance in less time.
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    Article
    Optimal Message Scheduling for the Static Segment of Flexray
    (IEEE, 2010) Schmidt, Klaus Werner; Schmidt, Ece G.
    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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    Conference Object
    The Implementation of Dynamic Distributed Real Time Industrial Communication Protocol (D 2rip)
    (2012) Gözcü, A.K.; Turan, U.; Schmidt, E.G.; Schmidt, K.W.
    Ethernet is a popular technology for industrial networking thanks to its low cost and high bandwidth. The current proposals to achieve real-time communication over Ethernet do not consider the determinism of the control applications resulting in inefficient use of bandwidth resources. We proposed a protocol stack architecture that works with standard Ethernet to address this problem. This paper describes the implementation of this architecture over Real-time Linux operating system and the first experiments to verify the operation. The implementation and performance of IEEE 1588 protocol which provides the required synchronization is also presented. © 2012 IEEE.
  • Thumbnail Image
    Conference Object
    Citation - Scopus: 2
    An Experimental Study of the Flexray Dynamic Segment
    (IFAC Secretariat, 2010) Schmidt, K.; Schmidt, E.G.; Demirci, A.; Yürüklü, E.; Karakaya, U.
    It is expected that the time-triggered FlexRay bus will replace the event-triggered Controller Area Network (CAN) for the high-speed in-vehicle communication in future automobiles. To this end, FlexRay provides a static segment for the transmission of periodic messages and a dynamic segment that is suitable for exchanging event-based (sporadic) messages. In this paper, we experimentally evaluate the operation of the FlexRay dynamic segment. In particular, we study how the maximum and average message delays are affected if the length of the dynamic segment, the message payload, the utilization of the dynamic segment and the priority assignment changes. Our experiments are carried out on a FlexRay network with 6 nodes. © 2010 IFAC.