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检索条件"主题词=Programmable Logic Controllers"

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Implementation of an Asymmetric Relay Autotuner in a Sequential Control Language

Implementation of an Asymmetric Relay Autotuner in a Sequent...

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IEEE International Conference on Automation Science and Engineering

作者： Alfred Theorin Josefin Berner Department of Automatic Control Lund University

ISBN: (纸本)9781467381840

Control applications contain both logic, sequencing, and control algorithms. A holistic view of this is seldom presented in teaching and papers. One reason is the separation of communities - automation groups typically come from the programmable logic Controller (PLC) world while control engineers primarily come from the Distributed Control System (DCS) world. Both logic, sequencing, and control algorithms are, however, well integrated in today's control systems since DCS systems now contain logic and sequencing and PLCs now contain control algorithms. This paper shows that both logic, sequencing, and control algorithms can be integrated seamlessly in a sequential control language. The particular application considered is a PID controller with a relay autotuner. The presented autotuner implementation yields good controller parameters and is freely available.

关键词： Computer algorithms sequential control Formal logic Proportional Integral Derivative Control relay Analyses, Sequence COMMAND AND CONTROL LANGUAGES programmable logic controllers control engineering Language DC SYSTEMS Sequencing

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Automatic Conveyor Belt Driving and Sorting Using SIEMENS Step 7-200 programmable logic Controller

Automatic Conveyor Belt Driving and Sorting Using SIEMENS St...

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International Symposium on Advanced Topics in Electrical Engineering

作者： George Alexandru SMEU Faculty of Electrical Engineering University POLITEHNICA of Bucharest Romania

The purpose of this paper is to present an example application based on a programmable logic controller module used for the operation and the control of a industrial unmanned system, namely a two conveyors and a pneum... 详细信息

ISBN: (纸本)9781467359795

关键词： programmable logic controllers PLC pneumatics conveyor

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Impulsive Noise Remotion by Inspection of the Masked Tones at PLC Receivers

Impulsive Noise Remotion by Inspection of the Masked Tones a...

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International Symposium on Electromagnetic Compatibility

作者： Pablo Torio Manuel G. Sanchez Departamento de Teoria de la Senal y Comunicaciones Universidad de Vigo

ISBN: (纸本)9781467307185

Impulsive noise (IN) consists of sudden short time peaks of high power which appear in communication channels from time to time. The IN influence on Power Line Communications (PLC) has been proved to be very harmful. A particular feature of PLC standards is the prohibition of signal power transmission at the frequency bands used by radio amateurs, which are referred to as the masked tones;however when IN arrives at the receiver, it is expected some IN leakage into these masked tones in the same way as into the rest of the PLC spectrum. We present an IN cancelling method which removes the IN from the received signal by analyzing the IN components at the masked tones.

关键词： Impulse noise programmable logic controllers Ham radios indium Frequency bands Receivers prohibition received signal Inspection

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Supporting integrated development of closed-loop PLC control software for production systems

Supporting integrated development of closed-loop PLC control...

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Annual Conference on IEEE Industrial Electronics Society

作者： Susanne Rosch Daniel Schutz Gulden Bayrak Birgit Vogel-Heuser Institute of Automation and Information Systems Technische Universitat Munchen

ISBN: (纸本)9781467324199

In this paper an approach to support the development process of closed-loop control software for programmable logic controllers (PLC) is shown. To enhance the development process, a fast and reliable data transfer between different tools and models used during different design phases is realized by model transformation. A core model created using the Systems Modeling Language (SysML) and a corresponding model editor based on the Unified Modeling Language (UML) in combination with a newly realized model transformation from the SysML parametric diagram to the Simulink block diagram is used to integrate the information from different engineering tools and models involved during automation engineering design phases. Hence, a consistent process for the development of closed-loop control software is realized.

关键词： PROCESS DEVELOPMENT UML programmable logic controllers design phases Production systems integrated development computer software computer programs reliability data Engineering tools

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programmable logic Controller based Embedded Quadratic Programming for input-constrained Internal Model Control

Programmable Logic Controller based Embedded Quadratic Progr...

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European Control Conference

作者： Ambrose. A. Adegbege Eric Mauro Department of Electrical and Computer Engineering The College of New Jersey

ISBN: (纸本)9781467371605

Advanced control algorithms such as optimization-based controls are known to offer superior performance as well as systematic constraints handling when compared to classical control strategies. However, the complexity of such advanced control methods makes their implementations difficult, especially on controllers with limited computational capacity such as the programmable logic controllers (PLC). This paper presents the capability of a low-cost low-end PLC for online computation of advanced control. In particular, an online quadratic program within the framework of input-constrained internal model control is implemented, and the effectiveness is illustrated using a hardware-in-the-loop experiment.

关键词： programmable logic controllers logic controller quadratic programming Advanced controls Model control internal model control Computer algorithms Control Methods programmable controllers

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THE APPLICATION OF COMMERCIAL POWER LINE COMMUNICATIONS TECHNOLOGY FOR AVIONICS SYSTEMS

THE APPLICATION OF COMMERCIAL POWER LINE COMMUNICATIONS TECH...

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IEEE/AIAA Digital Avionics Systems Conference

作者： Stephen Dominiak Sabina Serbu Stefan Schneele Franz Nuscheler Tobias Mayer Lucerne University of Applied Sciences & Arts EADS-Innovation Works Diehl Aerospace

ISBN: (纸本)9781467316996

Using the Power Distribution Network (PDN) concurrently as a data bus with Power Line Communications (PLC) technology provides an interesting solution for reducing the complexity, weight and volume of electrical systems in commercial aircraft. The European Union project TAUPE has recently completed an investigation on the use of PLC in commercial aircraft. A Technology Readiness Level (TRL) of four was reached and significant weight and complexity savings were demonstrated. Extensive functional and performance tests have been performed for two cabin reference applications in a representative demonstrator. The measurements were performed with commercial off-the-shelf (COTS) PLC equipment based on a state-of-the-art industry standard. A detailed analysis of the results showed a number of deficiencies in applying COTS technology, which has been developed primarily for consumer in-home multimedia distribution, to avionics systems. This paper will provide an analysis of the deficiencies identified during testing as well as present a set of guidelines to aid the way forward for further development towards reaching a higher TRL with PLC which has become well established in the consumer market, but has yet to reach its full potential for avionics applications.

关键词： programmable logic controllers data bus Power cables Electrical systems Communication Research avionics Business aircraft Deficiency transistor resistor logic Consumers Performance Tests full potential

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BUILDING UTILITY COMMUNICATIONS THROUGH DEPLOYMENT OF POWER LINE COMMUNICATION

BUILDING UTILITY COMMUNICATIONS THROUGH DEPLOYMENT OF POWER ...

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International Conference and Exhibition on Electricity Distribution

作者： Abdelfatteh HAIDINE Jorg MULLER Accenture GmbH

ISBN: (纸本)9781629931333

In this paper we discuss the technical requirements for communication solution to build the access networks of smart grid applications, and we analyse the deployment of the ICT infrastructure. For the investigations in this paper we focus on the high-speed narrowband Power Line Communications (PLC). First, we discuss the quality of service requirement imposed by the mostly used application for the distribution grid. Then, we give an overview about the current PLC implementations in Europe. The PLC deployment architecture is described, with the role of different PLC systems. After that, the deployment of PLC networks is discussed;covering network design, cost modelling and tool to assess different technology scenarios.

关键词： deployment Communication Research programmable logic controllers access network Power cables Power grids Quality of service Buildings Smart grids THROUGH

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Impact of Sampling Frequency Offset on PRIME 1.4 PLC Systems Performance

Impact of Sampling Frequency Offset on PRIME 1.4 PLC Systems...

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International Symposium on Power Line Communications and Its Applications

作者： Jose A. Cortes Alfredo Sanz Luis Diez Francisco J. Canete Universidad de Malaga Andalucia Tech Dpt. Ingeniera Comunicaciones E.T.S.I. Telecomunicacion Microchip Technology Inc. Torre C2

ISBN: (纸本)9781509023905

In this paper, the impact of an uncorrected sampling frequency offset (SFO) on the frame error rate (FER) of a PRIME 1.4 system is studied. It is also discussed the need of new algorithms to estimate and correct that SFO or to adopt more simpler strategies that mitigate somehow this problem, like applying in the receiver a shift to the fast-Fourier transform window towards the cyclic prefix part of the symbol.

关键词： FREQUENCY SHIFT System performance programmable logic controllers Bit error rate Signs and symbols Fast Fourier transform cyclic prefix

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An educational open-source tool for the design of IEC 61131-3 compliant automation software

An educational open-source tool for the design of IEC 61131-...

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2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM 2008), vol.1

作者： G. De Tommasi A. Pironti Dipartimento di Informatica e Sistemistica Universitá di Napoli Federico II Napoli Italy

UniSim is a graphic tool that can be used to develop and validate portable automation software, which fully complies with the IEC 61131-3 standard. UniSim is based on a graphical editor and on a simulation engine which allows to perform off-line validation of the automation software. Its simulation engine can also be interfaced with off-the-shelf I/O boards, in order to fast prototype automation systems by using a Personal Computer. Hardware-in-the-loop validation can be performed interfacing the prototype with the real plant or with an emulator. Furthermore, UniSim adopts the new XML Formats for IEC 61131-3, which provides an open interface for data exchange among different systems. Thanks to this choice the code developed with UniSim can be easily ported among different commercial platforms, increasing software reusability. Although the current release of UniSim is a work in progress version, it is already available at [1] and it can be effectively used to develop small and medium automation size projects.

关键词： programmable logic controllers Hardware-in-the-loop simulation Software tools Code reusability

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Image and Data Pre-processing Model for Real-time Communication between Dedicated PC and PLC Neural Network Application in Marble Production

Image and Data Pre-processing Model for Real-time Communicat...

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IEEE Mediterranean Electrotechnical Conference

作者： Alexander Tzokev Irina Topalova Faculty of Mechanical Engineering Technical University of Sofia

ISBN: (纸本)9781424457939

A model for image and data pre-processing and communication between a dedicated PC and a PLC with Neural Network (NN) application is proposed in this paper. The proposed model defines guidelines for creating a multithreaded application for receiving real-time data from several digital cameras, parallel image pre-processing based on predefined user algorithms, calculation of input data vector for NN and sending the input vector to the PLC NN application. The model was developed and verified in the laboratory "Intelligent Manufacturing Systems" at the Technical University of Sofia.

关键词： images Image programmable logic controllers network applications Pretreatment Imagery (Psychotherapy) Digital cameras Communication Research Neural network Personal computers intelligent manufacturing systems marbles multi-threaded application

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