The Experts below are selected from a list of 99762 Experts worldwide ranked by ideXlab platform

Wolfgang Rosenstiel - One of the best experts on this subject based on the ideXlab platform.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

Stefan Stattelmann - One of the best experts on this subject based on the ideXlab platform.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

Oliver Bringmann - One of the best experts on this subject based on the ideXlab platform.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

  • fast and accurate source level simulation of software timing considering complex code optimizations
    Design Automation Conference, 2011
    Co-Authors: Stefan Stattelmann, Oliver Bringmann, Wolfgang Rosenstiel
    Abstract:

    This paper presents an approach for accurately estimating the execution time of parallel software components in complex embedded systems. Timing annotations obtained from highly optimized binary code are added to the source code of software components which is then integrated into a SystemC transaction-level simulation. This approach allows a fast evaluation of software execution times while being as accurate as conventional instruction set simulators. By simulating binary-level control flow in parallel to the original functionality of the software, even compiler optimizations heavily modifying the structure of the generated code can be modeled accurately. Experimental results show that the presented method produces timing estimates within the same level of accuracy as an established Commercial Tool for cycle-accurate instruction set simulation while being at least 20 times faster.

Flavio Canavero - One of the best experts on this subject based on the ideXlab platform.

  • macromodels of ic buffers allowing for large power supply fluctuations
    Electrical Performance of Electronic Packaging, 2007
    Co-Authors: Igor Simone Stievano, I.a. Maio, C Siviero, Flavio Canavero
    Abstract:

    This paper addresses the generation of enhanced behavioral models for digital IC buffers. The proposed models can reproduce the behavior of real devices also for large fluctuations of the power supply voltage. The models can be easily estimated from port transient responses and can be effectively implemented in any Commercial Tool as SPICE subcircuits or VHDL-AMS descriptions.

  • ISCAS (6) - Linear and nonlinear macromodels for power/signal integrity
    2005 IEEE International Symposium on Circuits and Systems, 1
    Co-Authors: Igor Simone Stievano, Stefano Grivet-talocia, I.a. Maio, Flavio Canavero
    Abstract:

    In this paper, a systematic methodology for the assessment of power/signal integrity effects in high-speed communication and information systems is presented. The proposed methodology leads to accurate and efficient macromodels for logic devices, transmission-line interconnects and discontinuities that can be easily implemented in any Commercial Tool and can be combined for the simulation of the whole system. The SPICE implementation of macromodels is used for the prediction of power/ground noise and signals propagating on interconnects. An assessment of the impact that possible simplifications in the macromodel generation phase have on the simulation of a realistic application example is discussed.

Agirre Zubizarreta Josu - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of Tool steels by standing contact fatigue testing
    'Universitat Politecnica de Valencia', 2015
    Co-Authors: Agirre Zubizarreta Josu
    Abstract:

    Consulta en la Biblioteca ETSI Industriales (Riunet)[en] Tool steels are required to show high hardness and fracture toughness, as well as good wear resistance. Furthermore, other properties such as chipping and contact fatigue resistance are also essential in order to improve the life-time of the Tool. The goal of this thesis is to analyze the chipping and contact fatigue resistance of several steels and try to evaluate the correlation between these two properties. On the one hand, the performance of different ausferritic or carbide-free bainitic steels as Tool steels have been studied, by taking a high-silicon steel and subjecting it to two austempering treatments, to evaluate their properties next. On the other hand, several quenched & tempered Commercial Tool steel have been evaluated, produced either by conventional metallurgy, powder metallurgy or electro slag remelting. The microstructure and microhardness of all the steels have been studied first, and standing contact fatigue tests have been performed next. Finally, with the obtained results, the relation between the chipping resistance and contact fatigue resistance has been evaluated. Among the Commercial Tool steels Calmax, Vanadis 4 Extra and Caldie show much better standing contact fatigue resistance than AISI D2. Ausferritic steels have also shown good resistance, comparable to the Calmax or, in some cases, even better. Regarding the microhardness, ausferritc steels are not as hard as the Commercial Tool steels, but the values are not much lower than Calmax or AISI D2 for example. Finally, Caldie, the steel with the highest standing contact fatigue resistance shows, according to the provider, the best chipping resistance. The presented work has brought some insight to the evaluation of Tool steels. Standing contact fatigue tests can be used to obtain useful information and the results indicate that there might be a relation between the SCF resistance and the chippingresistance. Moreover, it has been determined that ausferritic steels show properties similar to some Commercial Tool steels, and therefore, it would be possible to use them in some Tool applications in the near future.[es] Los aceros para herramientas de corte requieren una gran dureza y tenacidad, a la vez que alta resistencia al desgaste. Además, otras propiedades tal y como la resistencia al astillamiento y a la fatiga de contacto son esenciales a la hora de mejorar la duración de servicio de la herramienta. El objetivo de este trabajo es analizar la resistencia al astillamiento y fatiga de contacto de diferentes aceros e intentar establecer una relación entre estas dos propiedades. Por una parte, el potencial de diferentes aceros ausferríticos o aceros bainíticos sin carburos utilizados como herramientas de corte ha sido estudiado. Para ello, se han aplicado dos diferentes tratamientos térmicos a un acero de alto contenido en Silicio y se han estudiado sus propiedades. Por otra parte, varios aceros para herramientas de corte comerciales, los cuales están templados y revenidos, han sido estudiados. Estos últimos aceros están producidos usando técnicas de la metalurgia convencional, pulvimetalurgia o refundición. En primer lugar, la miscoestructura y microdureza de los aceros ha sido estudiada, y tests de fatiga de contacto permanente han sido realizadas en segundo lugar. Finalmente, con los resultados obtenidos, la relación entre la resistencia a la fatiga y al astillamiento ha sido evaluada. De entre los aceros para herramientas de corte comerciales, Calmax, Vanadis 4Extra y Caldie han presentado mejores resultados en cuanto a la resistencia a la fatiga de contacto permanente que AISI D2. Los aceros ausferríticos también han presentado buenos resultados, comparables a los del acero Calmax o, en algunos casos, incluso mejores. En cuanto a la microdureza, los aceros ausferríticos no son tan duros como los aceros comerciales, pero los valores no son mucho más bajos que aquellos de los aceros Calmax o AISI D2, por ejemplo. Finalmente, el acero Caldie, que presenta los mejores resultados de resistencia a la fatiga, presenta también los mejores resultados de resistencia al astillamiento, según el proveedor. Este trabajo ha servido para aclarar algunas dudas a la hora de evaluar aceros para herramientas de corte. La información que se puede obtener mediante los test de fatiga de contacto permanente es muy útil, y los resultados indican que puede haber una relación entre esta propiedad y la resistencia al astillamiento. Por otra parte, se ha demostrado que los aceros ausferríticos presentan propiedades comparables a algunos de los aceros comerciales y, por lo tanto, que en un futuro no muy lejano será posible usarlos en aplicaciones para herramientas de corte.Agirre Zubizarreta, J. (2014). Evaluation of Tool steels by standing contact fatigue testing. http://hdl.handle.net/10251/47261.Archivo delegad

  • Evaluation of Tool Steels by Standing Contact Fatigue Testing
    2014
    Co-Authors: Agirre Zubizarreta Josu
    Abstract:

    Tool steels are required to show high hardness and fracture toughness, as well as good wear resistance. Furthermore, other properties such as chipping and contact fatigue resistance are also essential in order to improve the life-time of the Tool. The goal of this thesis is to analyze the chipping and contact fatigue resistance of several steels and try to evaluate the correlation between these two properties.On the one hand, the performance of different ausferritic or carbide-free bainitic steels as Tool steels have been studied, by taking a high-silicon steel and subjecting it to two austempering treatments, to evaluate their properties next. On the other hand, several quenched & tempered Commercial Tool steel have been evaluated, produced either by conventional metallurgy, powder metallurgy or electro slag remelting. The microstructure and microhardness of all the steels have been studied first, and standing contact fatigue tests have been performed next. Finally, with the obtained results, the relation between the chipping resistance and contact fatigue resistance has been evaluated.Among the Commercial Tool steels Calmax, Vanadis 4 Extra and Caldie show much better standing contact fatigue resistance than AISI D2. Ausferritic steels have also shown good resistance, comparable to the Calmax or, in some cases, even better. Regarding the microhardness, ausferritc steels are not as hard as the Commercial Tool steels, but the values are not much lower than Calmax or AISI D2 for example. Finally, Caldie, the steel with the highest standing contact fatigue resistance shows, according to the provider, the best chipping resistance.The presented work has brought some insight to the evaluation of Tool steels. Standing contact fatigue tests can be used to obtain useful information and the results indicate that there might be a relation between the SCF resistance and the chipping-resistance. Moreover, it has been determined that ausferritic steels show properties similar to some Commercial Tool steels, and therefore, it would be possible to use them in some Tool applications in the near future.Validerat; 20140908 (global_studentproject_submitter