Franco Pavese
At present, several international written standards and guides are available, dealing with the expression of uncertainty in measurement, calibration and testing, and concerning the definition of the basic concepts and related nomenclature and basic methods for data analysis. An inspection and comparison of these texts, which were prepared in a time span of more than twenty years, shows that, to different degrees, not all of them are consistent with each other, probably due mainly to an advancement of the discussion and of agreed solutions that took place in the indicated time span and that...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
E. Balestrieri, P. Daponte, S. Rapuano
The paper reports the latest results of the authors’ work within the project “Development of new methods for the characterization, modelling and correction of A/D and D/A conversion non-ideality, to contribute to the harmonization and the upgrade of the relative international standards”, co-funded by Italian Ministry of Education, University and Research. In particular, an experimental investigation for the harmonization of the measures of the ADC dynamic performance in the frequency domain, according to the standards in the field, is described. The comparison results show a good degree of...
Lorenzo Ciani, Marcantonio Catelani, Mario Mancini, Enrico Simoni
The main objective of static power inverters is to produce an AC output waveform from a DC power supply. These are the types of waveforms required in adjustable speed drives (ASDs), uninterruptible power supplies (UPS), static VAR compensators (SVC), active filters, flexible AC transmission systems, and voltage compensators, which are only a few of the possible applications. For sinusoidal AC outputs, the magnitude, frequency, and phase should be controllable. The purpose of this research, in collaboration with Astrid Energy Enterprises, is to design and realize an innovative method of...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
Marcantonio Catelani, Valeria L. Scarano, Roberto Singuaroli, Francesco Bertocci, Paolo Palchetti
It is emerged the necessity to modify the soldering process of all the devices under the RoHS European Directive, in order to eliminate the presence of lead. So our research is oriented to study the use of new materials for connections in electronic devices and to measure their characteristics and reliability performances. In this paper it is shown the preliminary characterization of a new study of the use of conductive materials without lead for the adhesion of the plate, which has piezoelectric properties, with the fingers’ comb. Found a possible variability of the samples production...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
Lorenzo Ciani, Marcantonio Catelani, Lorenzo Veltroni
This research faces the problem of disturbance induced by high energy particles on electronic devices. Based on detailed analysis of this phenomenon, the work is divided into two parts: in the first part testing of the Single Event Upset (SEU) has been carried out with the aim of determining diagnostic techniques and the mitigation of this disturbance, taking into account the fact that testing is one of the fundamental points in electronic programmable devices; in the second part a fault tolerant technique has been devised so as to achieve the requirements demanded on a real avionic system.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
Marcantonio Catelani, Valeria L. Scarano, Roberto Singuaroli,Stelio Montebugnoli, Germano Bianchi, Federico Perini
This research is developed in collaboration with the Istituto di Radioastronomia, Istituto Nazionale di Astrofisica (IRA-INAF) located at Medicina (Bologna), in the context of the BEST (Basic Element for SKA Training) project. SKA is the name given to a new generation radio-telescope that will have 1 km² of effective collecting area. SKA will be the most sensitive radio-telescope ever built that allows a deeper knowledge of the universe. After a reliability analysis we estimated the MTBF of the two approaches so we suggested the most reliable solution to implement. This work considers the...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
Marcantonio Catelani, Lorenzo Ciani, Valeria L. Scarano, Alessandro Bacioccola
In order to guarantee a software with high quality level vs a reasonable cost, the testing planning phase has to be study in detail, also to reduce the test time. This paper introduces the result of the application of software automatic test to one of the most common software failure causes: the overflow due to memory leaks. The analysis carried out on a single software failure cause wants to show the total generality of the technique and to define some parameters of life of the software. The general value of the method is shown applying the technique to different software and for everyone...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download
AA. VV.
The research program aims at improving the performance of appliances based on Analog-to-Digital and Digital-to-Analog conversion (ranging from measuring instruments to on-chip ADC and DAC). This will be done by developing methods for the accurate measurement and correction of conversion errors (including, when applicable, errors caused by transducers and signal-conditioning blocks). Another aim of the research is to expand the scope of the theory of measurement uncertainty, including conversion errors in dynamic conditions. This will allow the manufacturers to qualify correctly the...
M. Catelani, A. Zanobini, L. Ciani
The word error rate (WER) in an Analog to Digital Converter (ADC) is the probability of receiving an erroneous code for an input, after correction is made for gain, offset, and linearity errors, and a specified allowance is made for noise. Typical causes of word errors are metastability and timing jitter of comparators within the ADC. The aim of this paper is to give a contribution for a new draft of the IEEE Std 1241. Our attention is directed towards the word error rate estimation and to the Annex A of this standard. New statistical techniques which can better integrate what is sustained...
L. Cocco, P.Gazzola, S.Rapuano, L. Rossi
The total noise level in racing car environment is very high, in fact the engine can reach 20000 rpm (revolutions per minute) and the vehicle structure is very stiff. Upper-grade levels in terms of shock, vibration and temperatures need a careful understanding of damage mechanism, which will be active in this environment. This paper presents an experimental vibration diagnostic methodology implemented on Ferrari racing car model 248F1.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download