Ricardo Rezende Zucchini
Technology has been developed very much during the last decades. In order to get better materials, with precise chemical composition, electrical properties, thermal properties, etc, it is a must to be capable to accomplish chemical analysis of blends, sometimes dealing with components in very low levels. Today, there are a number of new analytical techniques which allows quantifying extremely low levels of analytes, even employing very small samples. However, using small samples could generate sampling errors. Experimental determination of the minimum sample masses in order to get good...
XVIII IMEKO World Congress
· TC10
· 2006
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Jaromír Volf, Stanislava Papežová, Josef Vlček, Petr Novák
The qualitatively new measuring and evaluating system for orthopaedic purposes has been derived from the Matrix Areal Pressure Transducer, and from the special 3D – SW for PC evaluation. Digitising the transducer’s outputs (up to 7500 sensors – semiconductive elastomer) insures the comfortable complete orthopaedic non-invasive diagnostics, and beside that the extraordinary high processing dynamics (up to 60 snaps/200 ms, i.e. – 300 Hz for full snaps).
XVIII IMEKO World Congress
· TC10
· 2006
· Download
Giovanni Betta, Domenico Capriglione, Antonio Pietrosanto
This paper deals with the design and the application of Artificial Neural Networks to the fault accommodation of the mass air flow meter in diesel engines. Several architectures are proposed and tested. In order to verify their real applicability to the automotive context, making use of suitable graphical tools and computational load indexes, their performance was compared in terms of accuracy and resource requirements.
XVIII IMEKO World Congress
· TC10
· 2006
· Download
Jose Dival Pastor Ramos, Luiz Carlos Simões Jr., Iuri Pepe
The need of alternative instrumentation and analysis methods for improving reciprocating compressor monitoring has been motivating an intensive effort in research. The goal here is to find new resources providing increased reliability and availability to such type of equipment. We explore the possibility of developing digital multichannel systems allowing simultaneous measurement of different parameters such as vibration, pressure, position, etc. Synchronous measurement of such parameters is a fundamental resource for diagnosing defects on components of the gas compression end, in addition...
XVIII IMEKO World Congress
· TC10
· 2006
· Download
Guillermo de Anda-Rodríguez, Eduardo Castillo-Castañeda, Salvador Guel-Sandoval, Juan Hurtado-Ramos, Maria Eugenia Navarrete-Sánchez
One of the major problems in precision machining processing can be related to the failure condition of the cutting tool. Hence online tool condition-monitoring is of much interest in metal-mechanics industry. The spontaneous problem of failure in a cutting tool, such as chipping and breakage, is becoming more and more important in the manufacturing technology and is usually associated with the stresses put on the tool during the cutting process. Other abnormal tool conditions in metal-machining includes: tool wear, tool-work piece, etc. In this work a method is presented for determining the...
XVIII IMEKO World Congress
· TC10
· 2006
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Zsolt János Viharos, Botond Kádár, László Monostori, Zsolt Kemény, Balázs Csáji, András Pfeiffer, Dávid Karnok
The paper summarizes the main ideas and results for realizing agile manufacturing systems having active disturbance handling approach for real-time manufacturing control. The intelligent integration of information received from production-, quality and process monitoring systems is addressed as the enabler of the approach.
XVIII IMEKO World Congress
· TC10
· 2006
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László Monostori, Zsolt János Viharos
The application of pattern recognition techniques, expert systems, artificial neural networks, fuzzy systems and nowadays hybrid artificial intelligence techniques in manufacturing can be regarded as consecutive elements of a process started two decades ago. The paper outlines the most important steps of this process. Agent-based systems are highlighted as promising tools for managing complexity, changes and disturbances in production. Further integration of approaches is predicted.
XVIII IMEKO World Congress
· TC10
· 2006
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Lech Hasse, Krzysztof Rogala, Josef Šikula, Ludwik Spiralski, Janusz Turczyński
Non-linearity and noise phenomena, also partial discharge properties of a capacitor have been analysed to established criteria for segregation of interference suppressor capacitors into different endurance (sustainability) and reliability groups. It can improve the process of quality estimation of high reliability capacitors. The system for production testing of high reliability interference suppressor capacitors with implementation of this testing technique has been described. Selected experimental results of measurements for capacitors produced by MIFLEX (Poland) have been presented.
XVIII IMEKO World Congress
· TC10
· 2006
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Chingiz Hajiyev
An approach to failure prediction in Kalman filter is developed which uses confidence and tolerance intervals for a innovation sequence. The algorithm proposed is based on the criterion of overlapping these intervals and allows the detection of potential failures in Kalman filter. The problem of failure prediction in multidimensional Kalman filters is solved too. In this case a multidimensional innovation sequence is replaced by one-dimensional sequences.
XVIII IMEKO World Congress
· TC10
· 2006
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C. P. Souza, R. C. S. Freire, F. M. Assis
A VLSI circuit test scheme taking inspiration from the Human Immune System is presented. Such a scheme is based on the Negative-Selection Mechanism which provides the human body with the capability to discriminate between the self (body’s own cell) and any foreign cell (non-self). Based on this, it is design a output response analyzer which is able to evaluate is the circuit is faulty. Experimental results showing the effectively of the proposed scheme are presented.
XVIII IMEKO World Congress
· TC10
· 2006
· Download