344 research outputs found

    Real-Time Fault Detection and Diagnosis System for Analog and Mixed-Signal Circuits of Acousto-Magnetic EAS Devices

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    © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The paper discusses fault diagnosis of the electronic circuit board, part of acousto-magnetic electronic article surveillance detection devices. The aim is that the end-user can run the fault diagnosis in real time using a portable FPGA-based platform so as to gain insight into the failures that have occurred.Peer reviewe

    Radiation Tolerant Electronics, Volume II

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    Research on radiation tolerant electronics has increased rapidly over the last few years, resulting in many interesting approaches to model radiation effects and design radiation hardened integrated circuits and embedded systems. This research is strongly driven by the growing need for radiation hardened electronics for space applications, high-energy physics experiments such as those on the large hadron collider at CERN, and many terrestrial nuclear applications, including nuclear energy and safety management. With the progressive scaling of integrated circuit technologies and the growing complexity of electronic systems, their ionizing radiation susceptibility has raised many exciting challenges, which are expected to drive research in the coming decade.After the success of the first Special Issue on Radiation Tolerant Electronics, the current Special Issue features thirteen articles highlighting recent breakthroughs in radiation tolerant integrated circuit design, fault tolerance in FPGAs, radiation effects in semiconductor materials and advanced IC technologies and modelling of radiation effects

    Design Tools for Submersible Converter

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    Tasasähkövoimalaitoksen mallinnus Hardware-in-the-Loop ympäristöön

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    Ever increasing requirements for increased fuel efficiency and reduced emissions on board a ship has prompted designers to turn their interest towards a distribution system where the main energy carrier is DC instead of AC. A DC power plant offers significantly reduced fuel consumption and easier integration of an increasing number of DC based sources and consumers, but also requires a more complicated control system for smart operation of the power plant. Therefore, the role of testing these control systems becomes even more important than before. This work introduces a Hardware-in-the-Loop (HIL) simulation technique for modeling and simulating a DC power plant on board a ship. In HIL simulation technique, a control-loop is built by using components, of which some are real hardware and some are simulated. This thesis work explores the possibilities for using the HIL simulation technique to perform real-time system level tests for a DC power plant on board a ship. The interfaces required to connect the real hardware components to the HIL simulator, and that way to the software component models as required by the simulation, will be examined. These interfaces consist of fieldbus communication (IEC61850 and Modbus) and a combination of digital and analog input and output signals. The goal of the HIL model of this work, is to offer an environment where different control schemes of the DC power system and the operation of the upper level power management and energy management systems can be tested safely and in a controlled manner. This requires that at least the controllers in the generating units are modeled using real hardware. The rest of the system can be modeled using virtual component models in the HIL software. A HIL model for modeling and simulating a complete DC power plant will be proposed and finally, the possibility to expand the model to include larger systems with more hardware will be discussed.Kasvavat vaatimukset polttoaineen kulutuksen ja päästöjen vähentämiseksi on saanut suunnittelijat kääntämään katseensa kohti sähkönjakelujärjestelmää, jossa sähkön jakelu kuluttajille toteutuu tasavirtana vaihtovirran sijasta. Tasasähkövoimalaitos mahdollistaa huomattavasti pienemmän polttoaineen kulutuksen ja helpottaa erilaisten DC lähteiden ja kuluttajien integroimista sähköverkkoon, mutta vaatii myös monimutkaisemman ohjausjärjestelmän voimalaitoksen älykkäälle toiminnalle. Tästä syystä ohjausjärjestelmän testauksen merkitys kasvaa jopa entuudestaan. Tämä työ esittelee Hardware-in-the-Loop (HIL) simulointimenetelmän tasasähkövoimalaitoksen mallintamiseksi ja simuloimiseksi. HIL mallinnustavassa säätöpiiri muodostetaan komponenteista, joista osa ovat oikeita komponentteja ja osa virtuaalisesti mallinnettuja komponentteja. Tämä diplomityö tutkii HIL mallinnustavan mahdollisuuksia suorittaa reaaliaikaisia järjestelmätason kokeita laivan tasasähkövoimalaitoksesta. Rajapinnat, jotka vaaditaan oikeiden komponenttien ja HIL simulaattorin yhteen liittämiseen tutkitaan tässä työssä. Nämä rajapinnat koostuvat kenttäväyläkommunikaatiosta (IEC61850 ja Modbus) sekä digitaalisten ja analogisten signaalien yhdistelmästä. Tämän työn HIL mallin tavoitteena on tuottaa testiympäristö, jossa tasasähkövoimalaitoksen säätöjärjestelmät ja ylemmän tason tehonhallinnan ja energianhallinnan järjestelmät voidaan testata turvallisesti ja hallitusti. Tämä vaatii, että ainakin sähköä tuottavien yksiköiden ohjaimet mallinnetaan oikeina komponentteina. Loput järjestelmästä voidaan mallintaa virtuaalisina komponentteina HIL simulaattorin ohjelmistossa. Työssä ehdotetaan mahdollinen HIL malli, jolla voidaan mallintaa ja testata koko tasasähkövoimalaitos. Lopuksi keskustellaan vielä mahdollisuuksista laajentaa mallia koskemaan laajempaa järjestelmää, jossa on enemmän oikeita komponentteja kytketty säätöpiiriin

    Applications of Power Electronics:Volume 1

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    Implementing radial basis function neural networks in pulsed analogue VLSI

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    Modeling and Analysis of Power Processing Systems

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    The feasibility of formulating a methodology for the modeling and analysis of aerospace electrical power processing systems is investigated. It is shown that a digital computer may be used in an interactive mode for the design, modeling, analysis, and comparison of power processing systems

    On-line Junction Temperature Estimation of SiC Power MOSFETs

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    L'abstract è presente nell'allegato / the abstract is in the attachmen
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