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10th World Congress on Intelligent Control and Automation (WCICA)

作者： Cai, Jun Li, Pingkang Wang, Peng Beijing Jiao Tong Univ Sch Mech Elect & Control Engn Beijing 100044 Peoples R China

ISBN: (纸本)9781467313988

A computer-PLC (programmable logic controller) control solution was proposed for the artificial trough rainfall simulator. The rainfall process with continuous changing intensities was simulated automatically with the control strategy. Frequency-tunable pulse signal of specified duty ratio was generated precisely using pulse module of PLC to drive nozzles oscillating at required frequency. Thus, arbitrary rainfall intensities within the output range of the simulator were achieved. Control configuration for trough rainfall simulator was built using Forcecontrol man-machine software. Parameters settings and rainfall intensities tracking during the rainfall simulation were realized. Simultaneously, a rainfall simulator performance evaluation procedure was performed based on a single nozzle rainfall test with six selected working states. A criterion of dynamic rainfall uniformity was proposed to estimate the performance of a rainfall simulator during the entire rainfall simulation. A Locally weighted scatterplot smoothing (LOESS) and weighted averaging approach was adopted in the evaluation procedure.

关键词： rainfall simulator computer control programmable logic controller rainfall uniformity LOESS

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Fail-Safe Operation and Reliability Enhancement of Distributed Process Plant with PLC

Fail-Safe Operation and Reliability Enhancement of Distribut...

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IEEE 5th India International Conference on Power Electronics (IICPE)

作者： Kumar, Parmod Singh, Karan Delhi Technol Univ Dept Elect Engn Delhi 110042 India

ISBN: (纸本)9781467309349

Safety and reliability of distribution system has considered while designing the control system configuration. The reliability values are computed for various configurations. A redundancy approach which makes the outputs fail-safe, and enhances reliability is designed around PLC. The design is based on the use of dynamic logic, suitable for its implementation in digital instrumentation & control systems and, in particular, in PLCs of low and medium range. Also reliability for the proposed systems are calculated and presented in this paper.

关键词： component programmable logic controller fail safe operation reliability distributed system

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Designing and Research of a Solenoid Valve Operating Life Test System

Designing and Research of a Solenoid Valve Operating Life Te...

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2nd International Conference on Instrumentation and Measurement, Computer, Communication and Control (IMCCC)

作者： Xu, Chengtao Zhou, Ying Cai, Shengnian Qin, Ran Liang, Yu Pang, Baolin Shenyang Univ Chem Technol Shenyang 110142 Peoples R China

ISBN: (纸本)9780769549354

A Solenoid valve Operating Life test system based on PLC was developed in order to examine the reliability and durability of a certain type solenoid valve,. In this paper, not only structure and principle of the test system, but also hardware and software design of the test system were illustrated in detail. The really applied results show that the test system can control test parameters quickly and accurately with features of high degree of automation, good reliability and easy to operate. And the test system provides a high-effect testing and researching platform for the development of high-performance Solenoid valves.

关键词： solenoid valve programmable logic controller duty cycle operating Life Testing

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From Cloud Computing to Cloud Manufacturing Excution Assembly System

From Cloud Computing to Cloud Manufacturing Excution Assembl...

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1st International Conference on Intelligent Robotics, Automation and Manufacturing (IRAM 2012)

作者： Giriraj, M. Muthu, S. Anna Univ Chennai 600025 Tamil Nadu India MP Nachimuthu M Jaganathan Engn Coll Erode Tamil Nadu India

ISBN: (纸本)9783642351969

In this paper we investigate guaranteeing assembly process information flow in real time, enterprise wide, from assembly station sensors directly to the industry policy making offices, is the true solution for improving productivity competence, reducing loses and greater than ever profits. In fact, the ideal production lies on the real machine or assembly capabilities of working non-stop at maximum speed, lacking downtimes or inactivity and assembled goods reject threats. Assembly lines will be prone to standstills and will produce defective pieces if the machines are unable to working to their full capability or demands made of them. This is often the case of misinformed factory management on real time factory floor performances. Even though equipped with original equipment manufacturer indicator knowledge about their systems, they still ca n' t get t hat efficiency so needed to improve yield. Transformation is necessary to ride the expected tide of change in the today's manufacturing environment, particularly in the information technology and automation landscape. A multinational company strives to reduce computing costs, to improve plant floor visibility and to achieve more efficient energy and surroundings use of their IT hardware and software investments. Cloud computing infrastructure accelerates and promotes these objectives by providing unparalleled flexible and dynamic IT resource collection, virtualization, floor visibility and high accessibility. This paper establish the value of realize cloud connect and usage state of affairs in cloud manufacturing environment, especially in automotive assembly stations which typically have large numbers of mixed applications, various hardware and huge data amount generated from sensors and devices in real-time and event-based exploration and assembly operations. The purpose of this paper is to behavior an Information Technology automotive assembly environment Systems analysis in the case of MNC's. To validate this obje

关键词： Cloud computing Cloud manufacturing execution system monitoring vision and control Shop floor data collection programmable logic controller

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Automation Control Targeting of a Solar Distiller

Automation Control Targeting of a Solar Distiller

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Brazilian Symposium on Computing System Engineering (SBESC)

作者： de Freitas, Salomao Nascimento, Ricardo Santos Machado Prado, Marcia Lissandra Univ Estadual Feira de Santana Dept Tecnol Feira de Santana Bahia Brazil

ISBN: (纸本)9781467357470

This study aimed at planning, building and running an automatic solar distiller, whose function is to direct the mirror still in the position that there is a maximum brightness of the capture of the sunlight. The distiller was designed in the style of a cylindrical parabolic solar concentrator developed sheet steel, coated mirrors, modeled on a parabolic structure, with a focus along the copper tube functioning as absorber. In the parameters for the automation of the project were considered the elements of machinery, power electronics and industrial instrumentation. The results for the automation of the solar distiller, satisfied the proposed project, as it was possible to obtain the data necessary to perform the mapping and displacement of the distiller in the direction of sunlight.

关键词： component solar energy programmable logic controller cylindrical parabolic concentrator

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Method for Translating Ladder Diagrams to Ordinary Petri Nets

Method for Translating Ladder Diagrams to Ordinary Petri Net...

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51st IEEE Annual Conference on Decision and Control (CDC)

作者： Chen, Xuekun Luo, Jiliang Qi, Pengfei Huaqiao Univ Dept Control Sci & Engn Xiamen 361021 Peoples R China

ISBN: (纸本)9781467320665

programmable logic controllers (PLCs) have been widely used in safe-critical systems, such as railway, nuclear power stations and petrochemical plants. Hence, the reliability and correctness of PLC programs are so important that formal methods are required to guarantee them. An algorithm is proposed to translate a Ladder Diagram (LD) to an ordinary Petri net (PN) system. Consequently, the PN theory can be used to simulate and analyze LD programs to verify whether PLC systems are live, reversible, and free of race and deadlocks.

关键词： ladder diagram programmable logic controller Petri nets supervisory control

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The Dynamic Properties Investigation of the PLC CPU Implemented in FPGA

The Dynamic Properties Investigation of the PLC CPU Implemen...

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11th IFAC/IEEE International Conference on programmable Devices and Embedded Systems (PDeS)

作者： Chmiel, M. Hrynkiewicz, E. Silesian Tech Univ Inst Elect Gliwice Poland

ISBN: (纸本)9783902823144

The paper presents some program examples written and tested to show possibilities of construction of CPUs for PLCs build based on FPGA development platform. Presented unit is optimised for minimum response and throughput time. The constructions are based on bit-word structures of CPU and two types of data (condition) exchange methods: with acknowledge and without acknowledge - in both cases control data are passed through the set of flip-flops. Third unit is built to compare with these two. This unit is simple one processor unit which can execute both - binary and numerical operations. The experiments shown high performances of elaborated CPUs.

关键词： programmable logic controller Central Processing Unit Bit-Word Structure of CPU Scan Time Throughput Time Response Time Concurrent Operation Field programmable logic Array

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A Web-Based Manufacturing Execution System for Industry Services and Supply Chain Management: Application to Real-Time Process Virtual Monitoring

A Web-Based Manufacturing Execution System for Industry Serv...

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1st International Conference on Intelligent Robotics, Automation and Manufacturing (IRAM 2012)

作者： Giriraj, M. Muthu, S. Pasupathy, S. A. Anna Univ Chennai 600025 Tamil Nadu India M P Nachimuthu M Jaganathan Engn Coll Erode Madhya Pradesh India Kumaraguru Coll Technol Coimbatore Tamil Nadu India

ISBN: (纸本)9783642351969

As tier1 and tier 2 manufactures seek solutions to bridge the gap between supply chain management (SCM) and the critical plant floor operations. The classical manufactures are looking for customized solutions to bridge the gap between SCM and plant floor operations. In industries, shop floor and SCM remains a blockade to improve visibility. In floor manipulates more data and gain better control of processes, solutions proliferate, adding new challenges to gaining full visibility and integrating floor and SCM. In order to increase the visibility of plant floor activities, Manufacturing Execution Systems (MES) are often used in conjunction with SCM systems to simplify and enable actual manufacturing processes. This paper proposes a solution to the integration of MES and supply chain management.

关键词： Manufacturing execution system programmable logic controller Supply chain management

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Using the Microcontroller and the PLC in a RPP robot control

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2nd International Conference on Advanced Material Research (ICAMR 2012)

作者： Laurean, Bogdan Lucian Blaga Univ Sibiu Sibiu Romania

ISBN: (纸本)9783037853634

This paper presents some aspects regarding the possibility of combining microcontroller and programmable logic controller (PLC) for robot control. The RPP robot is designed and manufactured within the Faculty of Engineering from "Lucian Blaga" University of Sibiu, as a patent: BRAT TELESCOPIC, Nr. 112418 B1, ***.6 B 25 J 18/02, from 17.02.1997. Classical systems for programming and control of industrial robot are based on numerical control equipment, developed around a PC. programmable logic controllers (PLC) haves proven to be viable alternatives to driving machine tools, industrial systems and Robots. Microcontrollers as computers offer advantage due to programmable inputs and outputs ports. The application of a microcontroller and PLC in control of a robot is presented in this paper.

关键词： robot microcontroller programmable logic controller DC motor

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Exceptions in a programmable logic controller implementation based on ADA

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COMPUTERS IN INDUSTRY 2007年第4期58卷 347-354页

作者： Plaza, Inmaculada Medrano, Carlos Univ Zaragoza Escuela Univ Politecn Teruel Dept Ingn Elect & Comunicac Teruel 44003 Spain

In this work we propose an implementation of IEC 61131-3 programmable logic controller (PLC) software model based on ADA programming language. The guidelines for an IEC 61131-3 to ADA translator are shown. This translator would allow obtaining executable code after compiling the ADA code. In this way, most error conditions that the standard foresees for PLC systems can be managed by the usual ADA compilers or the run-time environment, thus improving software quality. In addition, we show how to manage user- or system-defined error conditions in two ways: first, by proposing ADA-like exception statements in IEC languages;second, by showing an implementation of the error tasks that are explained in part 8 of IEC 61131 standard. Therefore, we conclude that ADA is a suitable target language for PLC. (c) 2006 Elsevier B.V. All rights reserved.

关键词： programmable logic controller IEC 61131 exception ADA

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