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检索条件"机构=Computer Architecture and System Programming"

共 160 条记录，以下是61-70 订阅

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Estimation and Evaluation of Common Cause Failures

Estimation and Evaluation of Common Cause Failures

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ICONS International Conference on systems

作者： J. Borcsok S. Schaefer E. Ugljesa Computer Architecture and System Programming University of Kassel Kassel Germany

Success of many modern applications is highly dependent on the correct functioning of complex computer based systems. In some cases, failures in these systems may cause serious consequences in terms of loss of human life. systems in which failure could endanger human life are termed safety-critical. The SIS (safety instrumented system) should be designed to meet the required safety integrity level as defined in the safety requirement specification (safety requirement allocation). Moreover, the SIS design should be performed in a way that minimizes the potential for common mode or common cause failures (CCF). A CCF occurs when a single fault result in the corresponding failure of multiple components. Thus, CCFs can result in the SIS failing to function when there is a process demand. Consequently, CCFs have to be identified during the design process and the potential impact on the SIS functionality have to be understood. This paper gives details about the estimation and evaluation of common failures and assesses a loo2 system. It is a survey paper that presents the newest developments in common cause failure analysis.

关键词： Redundancy Safety Hardware Failure analysis Fault tolerant systems computer architecture Functional programming Humans Reliability engineering Application software

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Software development for safety-related systems

Software development for safety-related systems

引用

ICONS International Conference on systems

作者： Josef Borcsok Sebastian Schaefer Department of Computer Architecture and System Programming University of Kassel Germany

Safety-related systems mostly comprise hardware and software solutions. Due to the increasing application of complex hardware and software systems, the software systems have to be considered regarding safety as well as hardware systems. The development of a safety-related software system is similar to the development of a safety-related hardware systems. But there are still no generally accepted methods for developing safety-critical software. One has to use the methods, which fit best to the actual requirements. However, the calculation of reliability and availability for safety-related software systems is far more complex.

关键词： programming Software safety Software systems Hardware Software testing Software design Application software Object oriented modeling computer architecture Documentation

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FPGA-based wireless sensor network platform for safety systems

FPGA-based wireless sensor network platform for safety syste...

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International Conference on Telecommunications (ICT)

作者： Ali Hayek Bashier Machmur Yusuf Suna Josef Börcsök Computer Architecture and System Programming University of Kassel Kassel Germany

Sensor communication applications not only require high performance processing but also flexible and reliable computing. Today, standard microprocessor systems are still application oriented and aren't suitable by implication for reliability-related and safety-related applications. In order to achieve a certain safety integrity level (SIL), several measures, methodologies and especially additional components should be considered, which leads to more and more complex systems. For this reason, new application devices should be targeted. In this context, reconfigurable devices such as SRAM-based Field Programmable Gates Arrays (FPGAs) provide a suitable solution due to their flexibility, and the necessary computing performance at affordable design cost and time. In fact, SRAM-Based FPGAs are nowadays frequently used in embedded communication systems due to their design flexibility and reconfigurability. This paper presents a prototyping platform for an FPGA-based safety-related communication system for a wireless sensor network. As a case study an acceleration sensor application is introduced.

关键词： Field programmable gate arrays Hardware Safety computer architecture Acceleration Monitoring Software

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Laser scanner based position detection for safety related applications

Laser scanner based position detection for safety related ap...

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International Symposium on Fundamentals of Electrical Engineering (ISFEE)

作者： R. Thum M. Bichuniak J. Börcsök Computer Architecture and System Programming University of Kassel Kassel Germany

New Solutions of autonomous vehicles, which are traveling along a painted line on the floor, have been found. In many cases navigation along a painted line will not be accepted because the ground will not be suitable for a painted line. Environmental concerns prohibit putting anything in or on the ground. A free navigation system is necessary. The load and the size of these vehicles increase. Areas where they are found are expanding. It is undoubtedly true that a safety related position detection system with a strong sense of accuracy would be needed to establish such a secure communication. A system that operates with high accuracy and high reliability is introduced here.

关键词： Vehicles Bar codes Wheels Accuracy Safety Reliability Monitoring

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Concept of an Optical Distance and Speed Sensor Using Novel Offsetless Spatial Frequency Filters in the Area of Functional Safety 32

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

引用

32nd IEEE International Symposium on Industrial Electronics, ISIE 2023

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

ISBN: (纸本)9798350399714

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. © 2023 IEEE.

关键词： system-on-chip

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Estimation and evaluation of the 1004-architecture for safety related systems

Estimation and evaluation of the 1004-architecture for safet...

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International Conference on Electrical and Electronics Engineering, ELECO

作者： Josef Börcsök Ali Hayek Computer Architecture and System Programming University of Kassel Kassel Germany

In the standard IEC 61508 miscellaneous architectures for safety related systems are introduced. Depending on the required safety, reliability and availability levels several architectures such as 1oo2-, 2oo2-, 1oo3-, and 2oo3-architectures can be selected. In this paper, the concept and calculation of a novel architecture is presented. The 1oo4-architecture (one out of four) represents an advanced safety architecture, which is 3-failure safe. This means that at least one of the four channels have to work correctly in order to trigger the safety function. In order to classify the quality of the proposed architecture for safety related systems the PFD-value is calculated. Additionally, the Markov-model for a 1oo4-architecture is introduced and the MTTF-value for this architecture is calculated. The results are high safety and high reliability.

关键词： Safety computer architecture Phase frequency detector Availability Probability Markov processes

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A Practical Approach for Reliability Prediction of Safety Critical Software Using Multi-Model Ensemble Techniques 7

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

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7th International Conference on system Reliability and Safety, ICSRS 2023

作者： Ouertani, Aymen Krini, Ossmane Börcsök, Habil. Josef Institute of Functional Safety & Cyber Security Baden-Wuerttemberg Cooperative State University Lörrach Germany Computer Architecture und System Programming University of Kassel Kassel Germany

ISBN: (纸本)9798350306057

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. © 2023 IEEE.

关键词： Economic and social effects

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FPGA-based wireless sensor network for safety-related cognitive systems

FPGA-based wireless sensor network for safety-related cognit...

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International Symposium on Telecommunications (BIHTEL)

作者： Ali Hayek Yusuf Suna Michael Schreiber Josef Börcsök Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

Wireless sensor networks for monitoring and steering industrial systems have emerged as an important new application area for wireless embedded technology in safety-related systems. Therefore several hardware platforms can be targeted. Due to their flexibility and reconfigurability along with high performance and power efficiency, modern Field Programmable Gate Arrays (FPGAs) are an excellent platform to realize such intelligent sensor networks. On one hand, FPGAs can integrate embedded processors and on-chip memory into a single die and can be easily configured to interface with a wide variety of popular communications protocols like SPI, UART and I2C, which are used for sensor communication. On the other hand, the reconfigurability of FPGAs supports the design of self-organizing computing systems, which are increasingly used in sensor applications. In this paper an FPGA-based wireless smart sensor network that integrates acceleration sensors for increasing safety aspects in cognitive systems used for industrial communication is presented.

关键词： Field programmable gate arrays Wireless LAN Robot sensing systems Acceleration Graphical user interfaces Software Hardware

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Contribution to reducing the critical faults in critical Software systems

Contribution to reducing the critical faults in critical Sof...

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： Jamal Krini Josef Börcsök Department of Computer Architecture and System Programming University of Kassel Kassel Germany

The software reliability plays an important role nowadays. From year to year the systems become more and more complex. Consequently, the software becomes more and more complex, too and this can cause more software errors. In this paper a new method is introduced, which serves to predict the reliability of software in a better way. Furthermore, the presumption that the hazard rate is constant is rebutted and a more realistic assumption is made. It is demonstrated that by the use of the new approach the prediction of the number of remaining errors is possible in a better way.

关键词： Software Hazards Optimization Data models Software reliability Mathematical model

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A partially automated HiL test environment for model-based development using Simulink® and OPC technology

A partially automated HiL test environment for model-based d...

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XXII International Symposium on Information, Communication and Automation Technologies, ICAT

作者： W. Chaaban M. Schwarz B. Batchuluun H. Sheng J. Börcsök Department of Computer Architecture and System Programming University of Kassel Kassel Germany

This paper is concerned with the design procedures of an automated testing tool, developed in Matlab ® /Simulink ® environment, that performs software verification during runtime on a PLC (Programmable Logic Controller) or so called HiL test (Hardware-in-the-Loop) for model-based development of control applications. In addition to checking the “semantic” or “functional” correctness of the automatically generated C++ - Code with RTW (Real Time Workshop ® ) for algorithms designed and developed in Simulink ® on hardware targets, the tool compares results obtained from the HiL test with the results of the MiL test (Model-in-the-Loop) performed in early stage of development for the same developed application. The main purpose behind this work is to develop reliable software that fulfil system requirements and to test its behaviour during realtime hardware simulation, in order to achieve the validation step which represents the terminating - step of almost all projects.

关键词： Mathematical model Software Testing Hardware Servers Real time systems Process control

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