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检索条件"主题词=PROGRAMMABLE controllers"

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An ISA88 Phase in IEC 61131-3 code based on the concepts of a Normalized Flow Element

An ISA88 Phase in IEC 61131-3 code based on the concepts of ...

引用

17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： van der Linden, Dirk Kastner, Wolfgang Mannaert, Herwig Artesis Univ Coll Antwerp Electromech Res Grp Antwerp Belgium Univ Antwerp Antwerp Belgium Vienna Univ Technol Automat Syst Grp Vienna Austria

ISBN: (纸本)9781467347372;9781467347358

Evolvability is one of the most desirable non-functional requirements of software architectures. In the area of automation control, the permanent shift of the requirements and the prevention of side-effects are key points. In addition, adaptability and flexibility in manufacturing systems continue to gain importance. This paper proposes an approach to achieve evolvability in IEC 61131-3 based software modules, from a structural point of view, i.e., starting from an individual line of code. We based our design of an evolvable ISA88 Equipment Phase on the Normalized Systems theory recently introduced. It seems indeed possible to develop evolvable IEC 61131-3 based modules with the existing, commercially available development environments. However, our guidelines require a disciplined programming style in extending software, based on a limited set of anticipated changes.

关键词： IEC standards flexible manufacturing systems production engineering computing production equipment programmable controllers software architecture

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Automated FPGA Implementation Methodology of PLC Programs with Floating Point Operations

Automated FPGA Implementation Methodology of PLC Programs wi...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Economakos, Christoforos Economakos, George Koutras, Ioannis Halkis Inst Technol Dept Automat GR-34400 Psachna Evia Greece Natl Tech Univ Athens Sch ECE GR-15780 Athens Greece

ISBN: (纸本)9781424463916

Although the performance of traditional PLC technology is adequate for the majority of industrial automation and control tasks, there exist a number of demanding applications, which need more powerful alternatives. One such alternative, which has received considerable research interest in recent years, is the implementation of control algorithms on FPGAs. An inherent difficulty of this approach is that it requires expertise in both industrial automation and FPGAs. Also, FPGAs have been traditionally suited towards fast, fixed point calculations. This paper presents an automated methodology which addresses the first problem, by using language translators and hardware behavioral or high-level synthesis. For the second problem, different approaches to support floating point operations at the behavioral domain are thoroughly investigated. Overall, an efficient methodology for design space exploration of industrial control applications is proposed, using FPGA technology. The presented experiments show that design trade-offs can be easily explored and the desired solution for each application can be efficiently selected.

关键词： FPGA technology PLC programs PLC technology automated FPGA implementation methodology automated methodology behavioral domain control algorithms design space exploration field programmable gate arrays fixed point calculations floating point arithmetic floating point operations hardware behavioral synthesis high level synthesis high-level synthesis industrial automation industrial control industrial control applications industrial control tasks language translation language translators programmable controllers

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Automatic arc suppression equipment with fast response based on TSC control technology

Automatic arc suppression equipment with fast response based...

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30th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Liu, YC Lu, TC Fu, C Wuhan Univ Wuhan 430072 Peoples R China

ISBN: (纸本)0780387309

This paper presents a kind of automatic arc suppression equipment with fast response based on thyristor switched capacitor (TSC) control technology. It can mitigate the bad effects caused by single-phase-to-ground-faults in the distribution system. Three functions were realized in order to ensure the equipment's safe and reliable operation: first, intelligent distinguishing a single-phase-to-ground-fault;second, accurate measure of the capacitive reactance of the system-to-ground;third, safe running of thyristors. The control system's hardware composed of PLC, HMI of touch screen and across-zero trigger boards is also proposed. The simulation tests prove the equipment has acceptable performance.

关键词： arcs (electric) thyristors power capacitors power distribution faults power distribution reliability programmable controllers power distribution control automatic arc suppression thyristor switched capacitor control single-phase-to-ground-faults distribution system reliability capacitive reactance programmable logic controller PLC

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Water Level Control System Using PLC and Wireless Sensors

Water Level Control System Using PLC and Wireless Sensors

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IEEE 9th International Conference on Computational Cybernetics (ICCC)

作者： Illes, Cosmina Popa, Gabriel Nicolae Filip, Ioan Politehn Univ Timisoara Engn Fac Hunedoara Timisoara Romania Politehn Univ Timisoara Fac Automat & Comp Sci Timisoara Romania

ISBN: (纸本)9781479900633;9781479900602

This paper describes a water level control system, using SIEMENS LOGO! 24RL programmable Logic Controller (PLC), RTX-MID-3V transceivers, converters and a pump controlled by electrical motor. The maximum water level, the minimum water level, the correct functioning of the motor driven system or some errors that can appear during the functioning of the motor driven system are visually signalled by LED-s connected to the PLC-s outputs. The goal of this paper is to present a low cost method for a water level control using a wireless solution.

关键词： level control programmable controllers water resources wireless sensor networks

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Concurrent Evolution of Hardware and Software for Application-Specific Microprogrammed Systems

Concurrent Evolution of Hardware and Software for Applicatio...

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IEEE International Conference on Evolvable Systems (ICES)

作者： Minarik, Milos Sekanina, Lukas Brno Univ Technol Fac Informat Technol CS-61090 Brno Czech Republic

ISBN: (纸本)9781467358699

Embedded systems often have to calculate some mathematical functions using iterative algorithms. When hard constraints are specified in terms of the area on the chip a possible solution is to implement the iterative algorithm by means of a microprogrammed digital circuit. In this paper, the first version of a new design framework is presented to automate the design and optimization of such microprogrammed systems. The framework utilizes evolutionary design and optimization techniques to find the most suitable implementation of the hardware architecture as well as the program for the programmable logic controller. The functionality of the proposed approach is evaluated using evolutionary design of three HW/SW systems under different constraints.

关键词： evolutionary computation genetic algorithms hardware-software codesign linear programming programmable controllers

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Development and Execution of PLC Programs on Real-Time Capable Mobile Devices 19

Development and Execution of PLC Programs on Real-Time Capab...

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19th IEEE International Conference on Emerging Technology and Factory Automation (ETFA)

作者： Obster, Mathias Kalkov, Igor Kowalewski, Stefan Rhein Westfal TH Aachen Embedded Software Lab D-52074 Aachen Germany

ISBN: (纸本)9781479948451

This paper introduces the application of off-the-shelf Android tablet computers as real-time capable control devices. We present an IDE to create and execute PLC programs written in Structured Text on a tablet running RTAndroid. This derivative of Android with support for real-time applications ensures the predictable execution of PLC programs. A USB-driven field device adapter enables interaction with peripheral hardware. The evaluation demonstrates the competitiveness of our solution in comparison to conventional PLC devices.

关键词： Android (operating system) mobile computing peripheral interfaces programmable controllers real-time systems Android tablet computers IDE PLC programs RTAndroid USB-driven field device adapter peripheral hardware real-time applications real-time capable control devices real-time capable mobile devices structured text Androids Hardware Humanoid robots Libraries Linux Mobile handsets Real-time systems

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Approach to a Simulation-Based Verification Environment for Material Handling Systems

Approach to a Simulation-Based Verification Environment for ...

引用

17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Seidel, Stephan Donath, Ulrich Haufe, Juergen Fraunhofer Inst Integrated Circuits Design Automat Div D-01069 Dresden Germany

ISBN: (纸本)9781467347372

Modern material handling systems (MHS) are complex systems which are controlled by various control units on different automation levels. The design of the MHS facility layout and the development of the control units require many different CAE tools but simulation and virtual commissioning does currently not play a significant role. This paper presents an approach towards an integrated simulation-based verification and virtual commissioning environment for all phases of an MHS project. During the first phase a material flow simulation of the plant model is conducted to analyse and confirm the planned performance indicators. The model is reused for testing and verification of the control units such as material flow controller or programmable logic controllers. An automatic equivalence inspector identifies differences between simulation results.

关键词： computer aided engineering digital simulation facilities layout materials handling production engineering computing programmable controllers

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Dynamic Real-time Simulator for Hydraulic Turbine Generating Unit Based on programmable Computer Controller

Dynamic Real-time Simulator for Hydraulic Turbine Generating...

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30th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Fang Hong-qing Shen Zu-yi Hohai Univ Coll Water Conservancy & Hydropower Engn Nanjing Peoples R China

ISBN: (纸本)9780780387300

A dynamic real-time simulator for hydraulic turbine generating unit based on programmable computer controller has been developed. The basic mathematical models of each component of the hydraulic turbine generating unit were analyzed. The hardware configuration and the software implementation of the dynamic real-time simulator were described in detail. With the simulator, the transients of the different Operating conditions of the hydraulic turbine generating unit could be calculated and simulated in real-time. The performance of the hydraulic turbine governor could be test and fine-tuned whether developed in the laboratory or installed in the field. The dynamic real-time simulator also can be operated as a training system for new workers of the hydro power plant Some simulations and field tests have been conduct with a prototype hydraulic turbine governor, and the results indicate that the dynamic real-time simulator has a good performance.

关键词： hydroelectric generators turbogenerators programmable controllers control engineering computing power engineering computing programmable computer controller hydraulic turbine generating unit dynamic real-time simulator software implementation hydro power plant hydraulic turbine governor

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Memory architecture exploration for programmable embedded systems 1

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2002年

作者： Peter Grun Nikil D. Dutt Nicolau Alexandru

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HUMIDITY AND TEMPERATURE CONTROL APPLIED TO A CONTROLLED ENVIRONMENT CHAMBER

HUMIDITY AND TEMPERATURE CONTROL APPLIED TO A CONTROLLED ENV...

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ASME International Mechanical Engineering Congress and Exposition (IMECE2015)

作者： Cardona Gil, Jorge A. Pazos Urrea, Juan P. Osorio, Marisol Hincapie, Carlos A. Univ Pontificia Bolivariana Escuela Ingn Grp Invest Automat & Diseno A D POB 56006 Medellin Colombia Univ Pontificia Bolivariana Escuela Ingn Grp Invest Agroind POB 56006 Medellin Colombia

ISBN: (纸本)9780791857427

The temperature, the relative humidity (RH) and the light are variables that influence and affect considerably the development of plants and mites. The study of the different stimulus's effect on plants and animals is possible under controlled conditions when the variables of interest are regulated. With this project we aim to obtain a suitable temperature and RH controller, property of the Grupo de Investigaciones Agroindustriales (GRAIN). Formerly, the chamber belonged to this research group and it was used as meat ripening facility, but it was necessary to ensure the proper environment for plants and mites for further research. In order to fulfill this new objective, a better control must be designed. As a final product we obtained a graphic interface in both the PLC (programmable Logic Controller) and the computer. In this way, the user can set certain conditions of temperature and RH inside the chamber, with and without the requirement of a computer to accomplish the control of these variables.

关键词： Temperature control Temperature Computers Control equipment programmable controllers

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