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检索条件"机构=Institute for Computer Architecture and System Programming University of Kassel"

共 153 条记录，以下是81-90 订阅

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FPGA Implementation of a Safety system-on-Chip Based on 1oo4 architecture Using LEON3 Processor

FPGA Implementation of a Safety System-on-Chip Based on 1oo4...

引用

International Conference on computer and Applications (ICCA)

作者： Mohamed Abdelawwad Ali Hayek Ahmed Alsuleiman Josef Börcsök Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

To ensure the reliability and safety in applications such as aeronautics, automotive, industrial automation, railway and space, several redundancy-based embedded architectures are used. In this work, the design of a 1oo4 safety system-on-Chip based on LEON3 processor with two different design approaches is presented. In both of the approaches, four LEON3 processors with a shared debug support unit, debug link and system peripherals are designed. However, one memory controller is interfaced with the system in the first approach while in the second approach four memory controllers are interfaced. Both the designs are implemented using the XUPV5-XC5VLX110T Xilinx development board (ML509). The performance of the system is verified in this work using the Xilinx ChipScope tool.

关键词： Safety Random access memory computer architecture Process control systems architecture Debugging Field programmable gate arrays

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ATPG Method with a Hybrid Compaction Technique for Combinational Digital systems

ATPG Method with a Hybrid Compaction Technique for Combinati...

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SAI Computing Conference

作者： Abdul Rafay Khatri Ali Hayek Josef Borcsok Department of Computer Architecture and System Programming University of Kassel Kassel Germany

ISBN: (纸本)9781467384612

In this paper, the Test Pattern Generation (TPG) with a new simple hybrid (dynamic and static) compaction technique for combinational logic circuits and systems is presented. Digital systems are implemented nowadays on an advance VLSI technology, which is called Field Programmable Gate Array (FPGA). The test procedure requires a deliberate introduction of faults in the system Under Test (SUT). FPGA circuits and systems are developed and written in Hardware Description Languages (HDLs). In addition, a novel method is also proposed and implemented in order to intentionally inject faults in the Verilog HDL code design of the SUT. It covers all possible fault locations in the SUT. This approach provides high quality compact test vectors and efficient memory utilization in comparison with other state-of-the-art methods. Not only are the hardness of individual faults and the sensitiveness of fault locations determined, but also their effectiveness is proposed in the fault tolerance strategy.

关键词： Test pattern generation Dynamic compaction Static compaction Fault coverage Hardness

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Embedded safety on a chip for SIL3 applications

Embedded safety on a chip for SIL3 applications

引用

International Conference on Microelectronics, ICM

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

In this paper a complete safety controller on a single chip is introduced. The presented chip is a comprehensive solution that includes a certified application specific integrated circuit for safety-critical applications according to the safety standard IEC 61508, meeting the safety integrity level SIL3. Furthermore, a SIL3 operating system and a SIL3 middleware are also briefly presented in this paper. Based on the presented solution, the smallest certified safety controller represents an innovative product and allows system manufacturers to create safe solutions that are ready for certification.

关键词： Safety IEC standards system-on-chip Middleware Operating systems

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International Conference on Technological Advances in Electrical, Electronics and computer Engineering (TAEECE)

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

Nowadays, many noticeable continues efforts are taken in the vehicle industry to develop robust intelligent systems that control and monitor the vehicles during operational time to lower the side effects of some abnormal conditions such as sliding and spinning; because of their main role in affecting the human safety and the vehicle life-time as well as the costs related to maintenance. Therefore, the importance of manipulating and controlling these special statuses with respect to safety and cost are the main motivations behind conducting this research work. In this paper a conceptual prototype of a safety-related platform for monitoring and recognizing the vehicles states by means of vibration sensors incorporated with incremental rotary encoders is presented. Additionally, the proposed approaches and algorithms to detect the vehicle status based on the captured sensory data are also presented.

关键词： Vehicles Vibrations Sensors Safety Acceleration Spinning Wheels

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Validation and verification of an impulse coupling for safe energy generation by rotation

Validation and verification of an impulse coupling for safe ...

引用

International Symposium on Fundamentals of Electrical Engineering (ISFEE)

作者： A. Ugljesa J. Börcök M. Schwarz Computer Architecture and System Programming Deartment University of Kassel Kassel Germany

Critical security systems for energy supply depends upon energy storage by batteries or the cable supply. “What if this self-sufficient must be supplied?” The main focus of the paper lies on construction and adaptation of an impulse coupling which generates a sufficient voltage to supply to a monitoring system by using rotational energy at lower rotational speed and thus making a system self-sufficient energy supply system. Another main focus lies in the optimization of the failure rate in a system because of mechanical components. In this research project the theoretical approaches are checked by a suitable parameter frame in a real system. A fault tree analysis (FTA) was pulled up for the evaluation of the failure rate, to show potential failures and to validate these, we carried out other simulations by means of the Finite elements method (FEM).

关键词： Springs Couplings Coils Generators Acceleration Shafts Torque

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Design and implementation of an FPGA-based 1oo4-architecture for safety-related system-on-chips

Design and implementation of an FPGA-based 1oo4-architecture...

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International Conference on Microelectronics, ICM

作者： Ali Hayek Moneer Al-Bokhaiti Josef Börcsök Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

FPGAs introduce a very attractive platform for the designing process of complex embedded systems. The complexity of these systems should be controlled to fulfill high demands and requirements, especially in safety-related applications, where aspects like reliability, availability and safety are of the utmost significance. In this context, the present paper intends the design and implementation of a novel on-chip quadruple redundant safety-related system architecture (1oo4-architecture - one out of four) as a fault tolerant technique to increase the level of safety integrity, reliability and availability of electronic embedded systems. For this aim the 1oo4-architecture and their related safety characteristics are briefly demonstrated. The FPGA-based embedded system model of this novel architecture is developed and explained. The main part of this paper focuses on the safety-related implementation on FPGA. Finally, an evaluation of the implemented architecture concludes this paper.

关键词： Reduced instruction set computing Monitoring Field programmable gate arrays Process control Chirp Table lookup

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Modeling a safety-related system for continuous non-invasive blood pressure monitoring

Modeling a safety-related system for continuous non-invasive...

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IEEE Biomedical Circuits and systems (BIOCAS)

作者： Huiyun Sheng Michael Schwarz Josef Börcsök Department of Computer architecture and System Programming University of Kassel Kassel Germany

In recent years, Pulse Transit Time (PTT) - based non-invasive continuous blood pressure monitoring systems have been investigated extensively. But the most relevant studies did not pay attention to the safety requirement of the system. In this paper a method is proposed to model the safety-related system for continuous noninvasive blood pressure monitoring. The V model, 1oo2 system and safe Bluetooth communication are used to enhance the safety of the system.

关键词： Biomedical monitoring Blood pressure Monitoring Safety Pressure measurement Wireless communication Medical services

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SRAM-based FPGA design techniques for safety related systems conforming to IEC 61508 a survey and analysis

SRAM-based FPGA design techniques for safety related systems...

引用

International Conference on Advances in Computational Tools for Engineering Applications, ACTEA

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

With the announcement and development of safety standards such as IEC 61508 and DO-254 standards a basis for the implementation of qualitative and quantitative analyzes in the areas of reliability and safety for electronic safety-related systems was laid. Especially with the publication of the second edition of the standard IEC 61508 standard and the introduction of new aspects such as on-chip redundancy and the use of integrated systems in such systems is becoming increasingly attractive. SRAM-based FPGAs are considered as the mainstream FPGA technology and represent an excellent platform for the development of system-on-chips due to their complexity and programming flexibility. In this paper, the implementation of FPGA-based safety-related systems according to the standard IEC 61508 is targeted. First, the advantages and challenges of FPGAs for the use in such systems are presented. Afterwards, measures and methodologies are discussed, which are required for the implementation of such systems. Finally suitable FPGA implementation of these measures is presented.

关键词： Field programmable gate arrays Safety IEC standards Hardware Software systematics

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Error detection on precise laser scanner based navigation

Error detection on precise laser scanner based navigation

引用

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

作者： Richard Thum Josef Boercsoek The Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

Autonomous guided vehicles have major benefits in terms of a rail bound conveyor technology because they are able to respond flexibly to changes in the application area. In many areas, safety-related position detection is necessary to avoid accidents. Derived from this position the driving speed in the work areas can be reduced in a safe way and minimum distances can also be observed in a safe manner. For this purpose, it is necessary to permanently control the measured position with regard to the disturbance variables and precision of measurements and in case of a deviation they have to be corrected in a highly reliable way. The solutions that are known so far do all imply two sensors that monitor each other. In the approach shown here, the required diagnostic coverage for a safety-related position determination is achieved through the use of only one laser scanner as well as through the help of algorithms that are implemented in a safety-related evaluation control. The focus of this paper is set on the position and orientation errors that are caused by measurement deviations.

关键词： Vehicles Position measurement Sensor systems Logistics Cameras Control systems

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Miniaturized safety systems: A way for future tasks in safety engineering

Miniaturized safety systems: A way for future tasks in safet...

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

作者： Josef Börcsök Chair for Computer Architecture and System Programming University of Kassel Kassel Germany

Application specific integrated circuits (ASICs), which represent a target platform for safety-related applications, were already covered in the first edition of the standard IEC 61508 in terms of functional safety. Corresponding requirements are introduced in part 2 of the standard. However, using ASICs with on-chip redundancy for safety applications has been introduced only in subsequent drafts of the standard. Corresponding core requirements for on-chip redundancy for ASICs are explained in the second edition of the standard. The theoretical conclusions and analyses have been implemented in several research projects based on a redundant system architecture consisting of two RISC cores with a hardware comparator as a diagnosis unit. In this paper, the implementation of safety-related on-chip systems will be discussed on the basis of the theoretical requirements of the standard as well as on the basis of practice-related experiences.

关键词： Safety IEC Standards system-on-chip Power demand Hardware Software

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