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Computation of accuracy of current transformers
Electrical Engineering, 1940WHILE the general principles of the operation of current transformers have been known for some time, and tests have provided much experimental data, the introduction of high-speed relaying, especially differential protection, required a greater knowledge of currenttransformer performance than was necessary previously. It is the purpose of this paper to
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Numerical Accuracy of Fast Fourier Transforms with CORDIC Arithmetic
Journal of VLSI signal processing systems for signal, image and video technology, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Bekooij, M., Huisken, J., Nowak, K.
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SPIE Proceedings, 2006
Colour management systems need to be accurate and repeatable, particularly in graphic arts applications such as converting image data to proofing systems and to final print processes. Modelling and computation errors were analyzed for a number of characterization data sets including single press sheet measurements and reference printing conditions ...
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Colour management systems need to be accurate and repeatable, particularly in graphic arts applications such as converting image data to proofing systems and to final print processes. Modelling and computation errors were analyzed for a number of characterization data sets including single press sheet measurements and reference printing conditions ...
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Dispersion accuracy using Slant Stack transformation
71st EAGE Conference and Exhibition - Workshops and Fieldtrips, 2009Last decencies show the increasing interest in using Multichannel Spectral Analysis of Surface Waves (MASW) for ground structure recovery. Using MASW the dispersion characteristics of surface wave field is often determined using so called p−τ transformation known as Slant Stack (SL).
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Accuracy of the Discrete Fourier Transform and the Fast Fourier Transform
SIAM Journal on Scientific Computing, 1996Accuracy of the discrete Fourier transform (DFT) and the fast Fourier transform (FFT) depends on the accuracy of the twiddle factors entirely. For accurate twiddle factor tables, this paper recommends to compute the sine/cosine functions with high precision arithmetic along the algorithms in terms of faster converging approximations, such as rational ...
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High accuracy Fourier transform fringe pattern analysis
Optics and Lasers in Engineering, 1991Abstract The principle of the Fourier transform method of fringe pattern analysis is described with emphasis on the refinements for high accuracy measurements. Characteristics of the main sources of errors of the retrieved phase in respect to the interferogram features and the modified software procedure are given.
M. Kujawinska, J. Wójciak
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Desirable accuracies in instrument transformers
Electrical Engineering, 1931Errors in both the producer's total meter registrations and the consumer's single meter registration are analyzed and evaluated by the “probable error” method. Accuracies better than 0.5 per cent are shown to be valueless from a practical standpoint.
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Electrical accuracy of Selsyn generator — Control transformer system
Electrical Engineering, 1946THE military requirements for high accuracy position control systems have placed emphasis on the need for a voltage signal source which can indicate electrically a mechanical shaft position. In addition this signal source must have high accuracy, marked dependability, and the capability of continuous mechanical rotation.
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On-Line Evaluation of Voltage Transformer Accuracy
Advanced Materials Research, 2012The accuracy of voltage and current transformer (VT and CT) is a key factor in electric power metering. Ratio error and phase displacement calibration of VT and CT is traditionally carried out off-line. As a result of the expansion of the power grid and the increasing metering quality requirements from customer side, the off-line metering of VT and CT ...
Xiao Hui Yang +3 more
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Accuracy Enhancement for Hilbert Transform Network Analyzers
29th European Microwave Conference, 1999, 1999A technique is introduced suitable for using the Hilbert transform to design a homodyne vector network analyzer with only one sampling signal. In addition, methods to improve the accuracy of this already known technique are introduced. An example shows the achieved accuracy by using these suggestions, which can be implemented on every network analyzer ...
Thorsten Hauschild, Reinhard Knochel
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