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检索条件"机构=Architecture and System Programming"

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Improvement, application and verification of a new multivariate forecasting model for real industry related issues 31st

Improvement, application and verification of a new multivari...

引用

31st European Safety and Reliability Conference, ESREL 2021

作者： Krini, Abderrahim Börcsök, Josef Engineering of Remanufacturing and Quality Robert Bosch GmbH Schwäbisch Gmünd Germany Department of Computer Architecture and System Programming University Kassel Germany

ISBN: (纸本)9789811820168

With this work, a research contribution in the field of reliability theory has been made, with which a realistic prognosis of reliability parameters of technical systems can be carried out. The motivation to deal with this topic resulted from the realization that the prognosis quality of established prognosis models must be optimized. An early and realistic prognosis of reliability parameters contributes to the success of a concern, mainly through the early implementation of quality measures. The work focuses on the development of a new multivariate prognosis model, which uses multivariate stress parameters as reference variables. Its application enables the prediction of reliability parameters for electronic control units. The predicted reliability parameters can be specified as stress-dependent (bivariate/multivariate) or time-dependent variables. While univariate reference quantities usually use the time dwell time of a technical system, the prognosis model newly presented here can process multivariate reference quantities. During the time in the field, technical systems are not only exposed to different usage behavior, but also to other stresses and influences that make a not inconsiderable contribution to failure. The use of time in the field as a univariate reference variable does not allow for this differentiated consideration and does not take into account relevant information in the reliability analysis. All existing prediction models have in common that only univariate reference parameters can be processed. For a fully comprehensive reliability analysis, all stress variables that lead to a failure must be considered. This is not sufficiently possible with a simple univariate approach. With the new approaches, it is now possible for the first time to consider different stress variables, their changes and their effects on the technical system under investigation in a field data analysis. The presented approach for the multivariate prognosis model considers i

关键词： Forecasting

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Design of a Novel Safe Approach to Monitor Drivers While Operating Their Cars

Design of a Novel Safe Approach to Monitor Drivers While Ope...

引用

International Conference on Advances in Biomedical Engineering (ICABME)

作者： Aseel Elhawawsha Carla Zeine Roy Abi Zeid Daou Dominik Kalinowski Joseph Khattar Samer Telawi Josef Boercsoek Department of Computer Architecture and System Programming University of Kassel Kassel Germany Mechatronics Eng. Department Saculty of Engineering Université La Sagesse Beirut Lebanon

Road accidents have been known to be one of the leading death causes around the world for a long time. Thus, cars and all kinds of road vehicles form a huge source of danger, and they relate to multiple high risks. There are many factors that can contribute to road traffic accidents such as the health condition of the driver if a medical emergency event happened while driving, drowsiness, or mind-wandering. The proposed system can monitor the behavior of the driver while driving as well as his/her health status. Moreover, it analyzes the monitored data, alerts the driver in a timely manner, and assists him/her in adjusting the driving behavior. Different dangerous and risky situations which can be faced during driving can be captured and avoided by using such a system which leads at the end to increase road traffic safety and reduce vehicle collisions. Notifications are developed in cases of drowsiness, loss of focus, or other concerns that may emerge while driving. However, when the driver's ability to operate the vehicle safely is hampered by a health concern, the implemented system is only able at this stage to alarm the driver itself and the surrounding cars as a first level of alarms.

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Concept of an Optical Distance and Speed Sensor Using Novel Offsetless Spatial Frequency Filters in the Area of Functional Safety

Concept of an Optical Distance and Speed Sensor Using Novel ...

引用

IEEE International Symposium on Industrial Electronics (ISIE)

作者： Frank Wasinski Werner Bonath Ubbo Ricklefs Josef Börcsök Michael Schwarz Eike Hahn Dept. of Electrical Engineering and Information Technology THM University of Applied Sciences Giessen Germany ICAS Institute for Computer Architecture and System Programming University of Kassel Kassel Germany

Optical speed sensors based on the spatial frequency filter method are a proven technology that offer high measurement accuracy over a wide speed range. Newly developed variants also enable measurements at very low speeds and increase the robustness of the method [1]. This makes the sensor very suitable for use in the area of functional safety. A measurement chain up to safety integrity level 3 (SIL3) should be feasible via a combination with a safety system on a chip (SoC) for evaluating the measurement data and an extension of the sensor module to include safety-related elements [2], [3]. By integrating the sensor at IC level, a compact overall solution is to be made possible. After the first successful tests with the safety SoC, further examinations of the measuring method with regard to functional safety are now necessary.

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Design and Implementation of an EMG-based system for Monitoring and Help Request

Design and Implementation of an EMG-based System for Monitor...

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2022 International Conference on Smart systems and Power Management, IC2SPM 2022

作者： Zeine, Carla Daou, Roy Abi Zeid Telawi, Samer Boercsoek, Josef Hayek, Ali Haidar, Gaby Abou University of Kassel Faculty of Electrical Engineering /Computer Science Department of Computer Architecture and System Programming Kassel Germany Lebanese German University Faculty of Public Health Jounieh Department of Computer Architecture and System Programming Biomedical Technologies Department Jounieh Lebanon Université la Sagesse Faculty of Engineering Furn El Chebbak Mechatronics Department Beirut Lebanon University of Applied Science Hamm-Lippstadt Department Lippstadt 2 Hardware Engineering Marker Allee 76-78 Hamm59063 Germany American University of Science and Technology Faculty of Engineering Zahle Lebanon

ISBN: (数字)9781665452915

ISBN: (纸本)9781665452915

Integrating electrophysiological signals in larger systems is getting wider due to the fact that such modalities facilitate the daily tasks of users. However, the high cost of monitoring systems (e.g., oscilloscopes) limits the testing and analysis of the acquired signal from such noisy systems (i. e., electrophysiological devices). The proposed system is a part of a larger proj ect that deals with the identification of sign language movements through the use of Muscle-Computer Interfaces. On one hand, the user is able to display the signal acquired by the electrodes on an LCD screen. On the other hand, the system helps a mute patient to issue a special message to his surrounding environment that does not know the sign language to ask for help. The second feature is not unique, as it can be replaced by any other application based on the user's needs. The system was tested on several persons, and the results are promising. © 2022 IEEE.

关键词： Liquid crystal displays

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A Practical Approach for Reliability Prediction of Safety Critical Software Using Multi-Model Ensemble Techniques

A Practical Approach for Reliability Prediction of Safety Cr...

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International Conference on system Reliability and Science (ICSRS)

作者： Aymen Ouertani Ossmane Krini Habil. Josef Börcsök Institute of functional safety & cyber security Baden-Wuerttemberg Cooperative State University Lörrach Germany Computer Architecture und System Programming University of Kassel Kassel Germany

This paper introduces a novel and comprehensive approach for estimating the reliability of safety critical software components in autonomous vehicle motion systems. The proposed approach in this paper presents a combination software reliability model (CSRM) that integrates multiple non-homogeneous Poisson process (NHPP) software reliability growth models (SRGMs) to achieve a reasonable compromise between accuracy, the trade-off between the goodness of fit and the simplicity, and stability. By using machine learning techniques, the CSRM effectively combines the strengths of individual SRGMs while mitigating their weaknesses through suitable evaluation and calibration techniques. The developed CSRM has been successfully applied and validated to facilitate a smoother and more efficient evaluation of reliability targets for software components in autonomous robotic wheelchair (ARW). Based on the validation results, the new CSRM has significantly enhanced the efficiency of the process for evaluating whether the defined reliability goals were being achieved. Furthermore, has facilitated a more accurate assessment of the need for further test executions and better planning of the required verification and validation session. This new approach provides valuable insights into the reliability of the developed software, particularly for software developers lacking extensive experience in identifying and applying appropriate SGRM.

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Large Eddy Simulations for Floating Wind Turbine Under Complex Atmospheric Inflow 32nd

Large Eddy Simulations for Floating Wind Turbine Under Compl...

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32nd International Ocean and Polar Engineering Conference, ISOPE 2022

作者： Xu, Shun Wang, Nina Wan, Decheng Strijhak, Sergei School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai China Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province Huadong Engineering Corporation Limited Hangzhou China Ivannikov Institute for System Programming of the Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9781880653814

The development of wind turbine towards to larger-scale and floating type, leading to the significant impact on the aerodynamic performance and fatigue load of the wind turbine induced by the complex atmospheric inflow. In this study, the numerical investigation of floating wind turbine (FOWT) under complex atmospheric boundary layer (ABL) inflow is performed. The NREL 5MW reference turbine mounted on the OC4 floating platform is adopted as the research object. Large eddy simulations (LES) combined with the actuator line model is used for the wind turbine blades numerical simulation, and the platform motions are solved by the potential theory. The complex ABL inflow is generated using a precursor LES method with long-enough time to obtain the quasi-equilibrium state turbulence. And the calculation results are compared with the uniform wind inflow. The oscillation amplitude of the rotor power for FOWT under uniform inflow does not exceed 40% with the excitation of regular incident wave, while the amplitude for ABL inflow reaches up to 100%. Long-term significant response of rotor power is observed because of the large-scale high-velocity airflow upstream the turbine rotor plane. The later asymmetric distribution of ABL inflow velocity is responsible for evidently response of aerodynamic yaw moment amplitude. For the floating platform motions, the oscillating amplitude of yaw motion for ABL inflow is over 2°, while the output value for uniform inflow is steady and does not exceed 0.2°. The differences of the other five platform motions are not significantly observed. © 2022 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Large eddy simulation

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Numerical Study on the Asymmetry in Wake Steering of Wind Turbine under Yawed Conditions 32nd

Numerical Study on the Asymmetry in Wake Steering of Wind Tu...

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32nd International Ocean and Polar Engineering Conference, ISOPE 2022

作者： Wei, Dezhi Wang, Nina Wan, Decheng Strijhak, Sergei School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai China Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province Huadong Engineering Corporation Limited Hangzhou China Ivannikov Institute for System Programming of the Russian Academy of Sciences Moscow Russia

ISBN: (纸本)9781880653814

Wake redirection via active yaw control is a promising strategy to improve the whole wind farm performance. To successfully apply such an operational control in the real-world engineering, it is necessary to have a precise knowledge of the yawed turbines and their wakes. In the current work, a series of numerical simulations are performed by the high-fidelity SOWFA tool, to study the occurring asymmetry in oppositely signed yaw angles, as well as its effects on wake-steering performance. The simulation results demonstrate that the wake curl is asymmetric between positive and negative yaw angles, arising from the interaction of the counter-rotating vortices with the vertical wind veer. Some key wake properties are also observed to be asymmetric with respect to the yaw angle direction, especially the lateral wake deflection, which can affect the efficiency of active yaw control. What's more, a load study of wake steering is conducted, showing that the positive yaw offsets are less harmful to the tested NREL 5MW wind turbine. In conclude, this work emphasizes the necessity and importance of considering the yaw direction in implementing yaw-based wind farm control. © 2022 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Wakes

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Safe-system-on-Chip for Functional Safety

Safe-System-on-Chip for Functional Safety

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Josef Börcsök Waldemar Müller Eike Hahn Michael Schwarz Mohamed Abdelawwad ICAS Institute for Computer Architecture and System Programming University of Kassel Kassel Germany

Various research institutions and semiconductor manufacturers have presented approaches for miniaturized safety systems based on redundant configurations in the last years. ICAS has been working on approaches for Safety systems on Chip (SoC) since 2005 and has developed several certified variants of safety SoCs in this context together with well-known safety manufacturers. In parallel, the further development of the architecture of safety SoCs was also driven forward and manifested with the ReSCU-V1 in 2018. A logical consequence is the development of the ReSCU-V2, with which further architectural developments of the safe SoC design at ICAS in Kassel have succeeded with a practically completely redundant architecture. The resulting SoC was realized on a 180 nm process from UMC. It has a chip size of 5×5 mm and consumes less than 500 mW of power.

关键词： Connectors ISO Standards Ethernet Safety system-on-chip Mechanical engineering Chip scale packaging

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SoC approach for low cost and low power consumption based on ARM Cortex M3 according to ISO 26262

SoC approach for low cost and low power consumption based on...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Muhammad Ikram Hafiz Mohamed Abdelawwad Waldemar Müller Eike Hahn Josef Börcsök ICAS Institute for Computer Architecture and System Programming University of Kassel Kassel Germany

ISBN: (纸本)9781665414937;9781665430579

The next milestone in the automotive industry is to achieve the complete autonomous driving capability. This demands high performance computing controllers and a larger number of Electronic Controller Units (ECUs) for realizing this goal. Also, the current shift towards electric cars where the battery capacity is limited, urges for new efficient approaches. Therefore, developing compact, miniaturized integrated controller that encompasses all the features is essential for minimizing the power consumption. At the same time, this approach of ECUs must also ensure the cost efficiency. To address and handle this need, the reduction in the ECUs numbers is necessary to reduce the cost factor but at the same time not compromising on the functionalities. Therefore, the approach of integrating these individual features in a single ECU is a promising way forward, i.e., system-on-Chip (SoC). To design and implement such an SoC for the automotive industry that ensures the safe operation of the controlled functions, it must follow a particular development criterion according to the ISO 26262 - functional safety of the road vehicles. This work focuses on the development of an SoC according to the ISO 26262 standard based on ARM Cortex M3 architecture which is an attractive candidate due to its low cost and low power consumption.

关键词： Industries Power demand ISO Standards Redundancy Layout Routing Safety

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Communication SoC based on 1oo2D architecture for industrial human-robot-collaboration

Communication SoC based on 1oo2D architecture for industrial...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Mohamed Abdelawwad Malte Drabesch Michael Schwarz Muhammad Ikram Hafiz Josef Börcsök ICAS Institute for Computer Architecture and System Programming University of Kassel Kassel Germany

ISBN: (纸本)9781665414937;9781665430579

The mechanical force imparted by industrial robots is enormous and can lead to dangerous situations for human workers and property if they malfunction. system designs based on the redundancy concept are essential to avoid or mitigate the resulting risk, which is recommended by the various safety standards. In this paper, a 1oo2D based safety SoC that provides multiple Ethernet communication interfaces is presented. Two different design approaches are implemented using the in-house FPGA development board based on the LEON3 soft processor. The software algorithms for each approach are developed and verified.

关键词： Service robots Software algorithms Ethernet Computer architecture Robot sensing systems Software Safety

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