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Optimizing dynamic post-correction of AD converters

Optimizing dynamic post-correction of AD converters

引用

IEEE Instrumentation and Measurement Technology conference

作者： H. Lundin M. Skoglund P. Handel Department of Signals Sensors and Systems Royal Institute of Technology Stockholm Sweden

Dynamic digital post-correction of AD converters is considered. A generalized dynamic correction method is proposed and a framework for analyzing the related bit allocation problem is derived. Finally, this framework is employed in an optimization problem. the solution to the problem indicates which ADC output bits to use in order to maximize the SINAD in a post-correction system with a constraint on memory size. the proposed methods are accompanied by exemplary results obtained using experimental ADC data.

关键词： Quantization Table lookup Multidimensional systems Sensor systems Signal analysis optimization methods Memory management Analog-digital conversion Linearity Timing jitter

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Linearization of nonlinear dynamic systems

Linearization of nonlinear dynamic systems

引用

IEEE Instrumentation and Measurement Technology conference

作者： J. Schoukens J. Nemeth G. Vandersteen R. Pintelon P. Crama Department ELEC Vrije Universiteit Brussel Brussels Belgium Department MIS Budapest University슠of슠Technology슠and슠Economics Budapest Hungary IMEC Leuven Belgium

In this paper we propose a method to linearize a nonlinear dynamic system: the nonlinear distortion is reduced, and the linear dynamics are corrected to a flat amplitude and linear phase in a user defined frequency band.

关键词： Frequency Nonlinear distortion Nonlinear dynamical systems Transfer functions Power system modeling Packaging Delay effects Power generation economics Ear Instruments

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UML model for the IEEE 1451.1 standard

UML model for the IEEE 1451.1 standard

引用

IEEE Instrumentation and Measurement Technology conference

作者： Kang Lee E.Y. Song National Institute for Standards and Technology Gaithersburg MD USA

the IEEE 1451.1 Standard for Smart Transducer Interface for Sensors and Actuators - Network Capable Application Processor (NCAP) Information Model was established to define a common object model and interface specification for the components of a networked smart transducer. the Unified modeling Language (UML) is a powerful tool for object-oriented modeling and design of complex systems. there is no existing UML model for the IEEE 1451.1 standard. this paper describes the development of an UML model for the IEEE 1451.1 specification. the resulting UML model captures the attributes, operations, and behavior information of the IEEE 1451.1 objects. this model includes the data model and the object model of IEEE 1451.1 standard. It will provide a way to shorten the development time for IEEE 1451.1-based smart sensor applications and to ease the integration of IEEE 1451.1 to other standard such as MIMOSA and OSA-CBM, which are used for condition-based maintenance of equipment.

关键词： Unified modeling language Object oriented modeling Intelligent sensors Power system modeling Standards development Transducers NIST Instruments USA Councils Electronic mail

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Uncertainty propagation in the discrete-time wavelet transform

Uncertainty propagation in the discrete-time wavelet transfo...

引用

IEEE Instrumentation and Measurement Technology conference

作者： L. Peretto R. Sasdelli R. Tinarelli Dipartimento di Ingegneria Elettrica Università degli Studi di Bologna Bologna Italy

Signal analysis based on the wavelet transform is applied in many fields. Detection and classification of electromagnetic transients in power systems is a significant application. the use of the wavelet transform for measurement purposes involves issues of uncertainty evaluation. In this paper, an analytical model for the evaluation of the uncertainty affecting the details and the approximation coefficients determined means of the discrete-time wavelet transform is proposed. the results of some experimental work showing the performance of the method are also presented and discussed.

关键词： Discrete wavelet transforms Uncertainty Wavelet analysis Electromagnetic propagation Signal analysis Power system analysis computing Power system measurements Power system modeling Power system transients Electromagnetic measurements

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Anytime fuzzy modeling approach for fault detection systems

Anytime fuzzy modeling approach for fault detection systems

引用

IEEE Instrumentation and Measurement Technology conference

作者： A.R. Varkonyi-Koczy P. Baranyi R.J. Patton Department of Measurement and Information Systems Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Telecommunication and Telematics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Electronic Engineering University of Hull Hull UK

Nowadays for solving fault diagnosis, fault isolation, and control problems , a possible solution can be the use of model-based approaches, which contain a representation of our knowledge about the fault-free and faulty systems. If the nature and/or the actual circumstances of the problem in hand change, the corresponding model should also be changed. Anytime techniques are very flexible in this respect and can advantageously be used when the operation should be performed under changing circumstances. this paper provides the possible anytime extension of the modeling issues of Takagi-Sugeno fuzzy inference operator based approximation which is the essential core of the parallel distributed compensation (PDC) design approach. the PDC based system analysis and the fuzzy observer design are focused on a benchmark problem of fault diagnosis of an actuator is a sugar factory.

关键词： Fuzzy systems Fault detection Fault diagnosis Neural networks Computerized monitoring Time measurement Power system modeling Information systems Intelligent systems Laboratories

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Storage devices, local file system and crossbar network file system characteristics, and 1 terabyte file I/O benchmark on the "Numerical Simulator III"

Storage devices, local file system and crossbar network file...

引用

IEEE/NASA Goddard conference on Mass Storage systems and Technologies, (MSST)

作者： N. Fujita H. Ookawa National Aerospace Laboratory Japan

We benchmarked a mass storage system, named "CeMSS", on the "Numerical Simulator III" system. It has 80 RAID-5 disk arrays and 40 LTO tape dives, as a storage devices, and has an HSM based local file system and crossbar network file system. We also described the CeMSS design outline. In order to clear our benchmark perspective we defined the "standard I/O characteristic" and "user 10 pattern". We recognized that the disk and tape devices of CeMSS are optimized at 2MB and 128+ [KB] I/O size. Using 16-way disks, user application programs can use over 1[GB/s] I/O throughput on the NS-III. Also, under the 80-way disk condition, CeMSS could operate a 1[TB] file within I/O minutes.

关键词： File systems Numerical simulation Computational modeling Aerospace simulation throughput Laboratories Drives Concurrent computing Performance evaluation Computational fluid dynamics

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Measurements analysis of the software-related power consumption in microprocessors

Measurements analysis of the software-related power consumpt...

引用

IEEE Instrumentation and Measurement Technology conference

作者： N. Kavvadias P. Neofotistos S. Nikolaidis K. Kosmatopoulos th. Laopoulos Electronics Laboratory Physics Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper the measurements taken for the development of instruction-level energy models for microprocessors are presented and analyzed. An appropriate measuring environment and a suitable measuring methodology were developed for taking the necessary measurements. the energy of an instruction is defined as a sum of three components. the pure base energy cost, the inter-instruction cost and the effect of the energy sensitive factors (instruction parameters). these components are characterized for each instruction of the ARM7TDMI embedded processor and their values are analyzed. Using the resulted models estimates of the energy consumption of real software kernels with only up to 5% error was determined.

关键词： Power measurement Energy consumption Microprocessors Costs Energy measurement Software measurement Physics Power system modeling Kernel Digital systems

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optimization of the communications between processors in a general parallel computing approach using the selected data technique

引用

7th International conference on Parallel Computing Technologies (PaCT 2003)

作者： Bolvin, H Chambarel, A Fougere, D Gladkikh, P Fac Sci Lab Complex Hydrodynam F-84000 Avignon France L3M Lab Modeling Mech F-13451 Marseille 20 France Russian Acad Sci ICM Supercomp Software Dept Novosibirsk 630090 Russia Russian Acad Sci SB MG Novosibirsk 630090 Russia

ISBN: (纸本)3540406735

A large variety of problems that are out of reach of single processor computer capabilities. Many approaches are offered today to get round this. Each of these has its own strengths and weaknesses : a compromise has to be found. We will introduce a general parallel computing method for engineering problems dedicated to all users. We have searched an easy method for code development. A technique of data selection (Selected Data Technique - SDT) is used for the determination of the data dedicated to each processor. Several problems associated with the communication times are posed and solutions are proposed in accordance with the number of processors. this method is applied to very large CPU cost problems, particularly the unsteady problems or steady problems using an iterative method. So the domain of potential applications is very wide. the SDT-parallelization is performed by an expert system called AMS (Automatic Multi-grid system) included in the software. this new concept is a natural way for the standardization of parallel codes. An example is presented hereafter.

关键词： Parallel processing systems

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Stochastic properties of quantization noise in memoryless converters affected by integral non-linearity

Stochastic properties of quantization noise in memoryless co...

引用

IEEE Instrumentation and Measurement Technology conference

作者： A. Moschitta D. Petri Dipartimento di Ingegneria Elettronica e dell'Informazione Università degli Studi di Perugia Italy Dipartimento di Informatica e Telecomunicazioni Università degli Studi di Trento Italy

this paper is focused on the stochastic properties of quantization noise introduced by non-ideal memoryless converters. In particular, overloading effects and integral nonlinearity (INL) are considered. A theoretical model is given, which accurately describes the quantization noise probability density function in presence of overloading noise and both deterministic and stochastic INL. the model is also extended to derive quantization noise power as a function of both input signal and INL stochastic properties. Finally, the results are applied to a memoryless converter affected by Gaussian distributed INL, analyzing the properties of quantization noise.

关键词： Stochastic resonance Quantization Probability density function Integral equations Telecommunications Power system modeling Gaussian noise Modems Neodymium Digital communication

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RLC parameter measurement of N-winding transformer

RLC parameter measurement of N-winding transformer

引用

IEEE Instrumentation and Measurement Technology conference

作者： D. Grimaldi Dip. di Elettronica Informatica e Sistemistica Università della Calabria Rende Cosenza Italy

the paper proposes a new technique to measure the RLC parameters of an N-winding transformer. the technique operates in successive steps. First of all the resistive and inductive parameters are evaluated by low frequency analysis and the stray capacitances by resonance analysis. Successively, the final values are obtained by iterative procedure fitting the electrical equilibrium equations of each winding on experimental data obtained at the working frequency or over a range of frequencies. the parameter estimation accuracy is also investigated. the advantages of this technique are discussed in comparison to the traditional ones. the effectiveness and the validity of this technique are shown by the comparison of the experimental voltage given by a three-winding high frequency transformer prototype with those given by simulations of the corresponding electrical circuit model.

关键词： Power system modeling Frequency measurement Testing Voltage Resonance Employee welfare Capacitance measurement Electrical resistance measurement Electrostatic measurements Inductance measurement

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