Tomaž Lušin, Damir Ilic, Dušan Agrež
The error reduction of the non-parametric amplitude estimation of the periodic signals with the three-point interpolated discrete Fourier transform (DFT) using cosine windows is presented. The paper analyzes and compares the systematic bias errors and the noise error behavior of the amplitude estimation changing the order of Rife-Vincent windows class I (RV1), which are designed for maximization of the window spectrum side-lobe fall-off, and minimum side-lobe level (MSL) windows, which are designed for minimization of the energy in the window spectrum main lobe. The lowest systematic bias...
TC4 Symposium 2014
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· 2014
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Pasquale Arpaia, Mario Girone, Domenico Maisto, Carlo Manna, Marco Pezzetti
Predictive maintenance scheduling is an optimization problem aimed at defining the best activity sequence to minimize the expected cost over a time horizon. For very-large systems such as in experimental physics, maintenance optimization turns out to be very difficult owing to analytically intractable objective functions. In this paper, a meta-heuristic predictive maintenance algorithm based on the Generalized Extremal Optimization (GEO) is presented. With respect to state-of-the-art meta-heuristic techniques, the GEObased maintenance algorithm allows optimization procedure to be configured...
TC4 Symposium 2014
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Galia Marinova, Zdravka Tchobanova
The paper presents an environment and methodology for analysis of Pseudo random bit sequence generator (PRBSG) and Pseudo random number generator (PRNG) circuits through simulation and measurement. Circuits’ projects are described in VHDL and then simulated on FPGA devices. The programmed FPGAs are stimulated by vector signal generator and then measured with a logic analyzer. The bit sequences generated by the PRBSG circuits are tested for randomness with tests from the NIST test suit. The random numbers generated by the PRNG circuits are tested through histograms and chi-square tests for...
TC4 Symposium 2014
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H. Braun, M. Buzio, R. Deckardt, O. Dunkel, R. Felder, L. Fiscarelli, R. Ganter, S. Kasaei, F. Löhl, S. Sanfilippo, G. Severino, V. Vrankovic, L. Walckiers
Two rotating coil shafts with a challenging small diameter of 8 and 19 mm, originally developed at CERN for the measurement of linear accelerator magnets, have been used to quantify the magnetic field strength, the harmonic content and the field direction of series quadrupoles for the Swiss Free Electron Laser in construction at the Paul Scherrer Institute. In this paper, we describe the design and construction of these coils, the procedure used for their calibration, and the results obtained on the magnets tested so far. We focus especially on the manufacturing and calibration difficulties...
TC4 Symposium 2014
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Pasquale Arpaia, Domenico Caiazza, Carlo Petrone, Stephan Russenschuck
A vibrating wire is used to measure the longitudinal profile of the magnetic flux density in the aperture of a non-periodical structure such as a quadrupole accelerator magnet. Limitations in terms of measurement repeatability and uncertainty are observed. The possible causes are investigated by experimental characterization of the measurement system. Uncertainty sources are identified and particular cases are reported in which the mathematical assumptions are no longer valid. The challenges are discussed and measures are proposed to improve the metrological performance.
TC4 Symposium 2014
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· 2014
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Giancarlo Golluccio, Anthony Beaumont, Marco Buzio, Olaf Dunkel, Markus Stockner, Thomas Zickler
Printed Circuit Boards (PCB) are largely used as measurement devices. Recently they have found applications in magnetic field measurements of accelerator magnets, in particular in rotating coil system, thanks to the quality that can be achieved in terms of coil area and winding distribution. In this paper the application of such technology to produce an array of coils for measuring the integral field homogeneity inside curved accelerator dipole magnets is presented. A set of static coils measuring the flux variations during a current pulse, which are installed on parallel paths of the...
TC4 Symposium 2014
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Yoshio Mita, Eric Lebrasseur, Tomoki Sawamura, Naoko Kondo, Kunihiro Asada
The paper summarizes CMOS-MEMS multi-project activities among the “Ultrafine Lithography and Nano Measurement Center” of Japanese Government of Education (MEXT)’s Nanotechnology Platform Program, participated by VLSI Design and Education Center of the University of Tokyo. The best mix and match of (1) CMOS LSI fabrication on user-defined Silicon on Insulator (SOI) wafer through VDEC’s multi-chip foundry service and (2) MEMS post-processing in cutting-edge micro/nano fabrication apparatuses installed in Federal Class 1 Supercleanroom of VDEC in Takeda Sentanchi Building provides powerful...
TC4 Symposium 2014
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Antonio Affanni, Giovanni Chiorboli
A novel instrument able to acquire Skin Potential Response (SPR) signals is proposed; SPR is a branch of Electrodermal Activity (EDA) and consists of reading nervous electric pulses that arise when the sympathetic nervous system activates sweat glands as a reaction of an external stressing stimulus. Scientific literature shows that EDA is a good methodology to detect workload, increased stress level and many neurological diseases or addictions. In this paper, we present the design and characterization of a wearable, battery operated, wireless device which can acquire SPR data and can be...
TC4 Symposium 2014
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Valter Pasku, Mario Luca Fravolini, Antonio Moschitta
In this paper, a ranging technique based on narrowband transmissions in the 2.4 GHz ISM band is discussed. Multipath mitigation techniques based on Multiple Input Multiple Output (MIMO) philosophy are considered, discussing the effect of antenna directivity on the achievable performance.
TC4 Symposium 2014
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Stefano Scheggi, Marco Aggravi, Domenico Prattichizzo
The decline of the cognitive abilities related to age usually determines a gradual withdrawal of older adults within the domestic walls. Part of the problem is the difficulty in navigating in large and crowded environments thatmay be perceived as intimidating. To alleviate this problem, we propose a vibrotactile device which can be used along with a walking assistant endowed with autonomous sensing and active brakes able to guide the user. In this paper, we address the problem of guiding the user with a minimal impact on his/her freedom of motion. We propose a solution based on the use of...
TC4 Symposium 2014
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· 2014
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