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7th IFIP WG 5.14 International Conference,CCTA 2013

作者： Wang Jianlun Wang Shuting Chen Jianshu Liu Hao Xu Dongbo College of Information and Electrical Engineering China Agricultural University

In order to realize efficient water-saving irrigation of strawberry greenhouse in precision agriculture,the paper proposed an automatic irrigation algorithm based on fuzzy comprehensive evaluation irrigation based on PLC and the configuration software,and build a remote control *** measuring the greenhouse soil parameters and strawberry soil moisture data to determine the upper and lower limits of irrigation and set buried position of moisture *** fuzzy comprehensive evaluation method to handle multi-sensor data,and develop an automatic irrigation control algorithm that depends on the strawberry irrigation *** up a C / S mode of automatic irrigation control system through the 3G network and the remote *** experimental results show that the algorithm is reasonable and reliable,and can be well adapted to the strawberry *** automatic irrigations meet the steady demands for real-time performance and high *** irrigation automation of strawberry greenhouse provides a theoretical and practical basis for intelligent irrigation of strawberry greenhouse.

关键词： Strawberry greenhouse Irrigation Control Fuzzy Comprehensive Evaluation programmable logic controller

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Didactic approach to multivariable control using IEC 61131 model-based design and programmable logic controllers

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IFAC Proceedings Volumes 2013年第17期46卷 220-225页

作者： Berno J.E. Misgeld Anake Pomprapa Steffen Leonhardt Philips Chair for Medical Information Technology (MedIT) Helmholtz-Institute for Biomedical Engineering RWTH Aachen University Germany

Recent advances in the programming standardisation and hardware development in the automation industry offer new possibilities for control engineering education. The IEC 61131 is nowadays widely used and there exist automatic code generators for high level simulation languages. The relatively cheap, but powerful hardware and the applicability of the programmable logic controller (PLC) to automation and complex control tasks make this combination a valuable tool for undergraduate and postgraduate control engineering classes. In this paper, the application of the model-based tool chain using Matlab/Simulink, IEC 61131 and a PLC is presented and applied to the well-known four-tank model as an experimental platform. Several educational examples used in linear and nonlinear control engineering classes are explained in detail and implemented in the hardware setup. Experimental results are shown and compared to simulation data.

关键词： programmable logic controller linear control IEC 61131 decoupling control

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Control level simulation of an automatic storage and retrieval system in the automotive industry

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CONCURRENT ENGINEERING-RESEARCH AND APPLICATIONS 2013年第1期21卷 13-25页

作者： Ko, Minsuk Park, Sang C. Chang, Minho Ajou Univ Dept Ind Informat & Syst Engn Suwon 441749 South Korea Korea Univ Dept Mech Engn Seoul 136701 South Korea

Conventional simulators have focused on the abstract aspects of an automatic storage and retrieval system, which mainly deals with design verification, alternative comparison, and system diagnosis. Although such simulators can provide overall system visibility by monitoring how well the process works, the simulation models are not sufficiently realistic for detailed design and implementation purposes. To address this problem, we propose a method of control level simulation of an automatic storage and retrieval system in an automobile plant. The proposed method involves four major steps: (1) designing the process and layout for effective storage and retrieval;(2) abstract simulation of the automatic storage and retrieval system;(3) preparing the mechanical design to obtain three-dimensional kinematic models and the electrical design to produce a control program and a plant model;and (4) control level simulation of the automatic storage and retrieval system, including both manual mode and automode simulations via a human-machine interface. The major benefit of the proposed method is the reduction of the construction time and effort required to validate the programmable logic controller program of a real automatic storage and retrieval system, since potential errors can be detected and fixed before actual implementation.

关键词： Automatic storage and retrieval system virtual manufacturing simulation programmable logic controller control level

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PC-based data acquisition system for PLC-controlled linear switched reluctance motor

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TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES 2013年第1期21卷 71-80页

作者： Dursun, Mahir Ozden, Semih Gazi Univ Dept Elect & Elect Engn Fac Technol Ankara Turkey Gazi Univ Dept Elect Vocat Sch Ankara Turkey

In this study, a linear switched reluctance motor (LSRM) with 250 W, 6/4 poles, 3 phases, and 24 V was controlled with a programmable logic controller (PLC). Some parameters of the LSRM were set, and for PC monitoring, software developed by the authors was used. A serial port was used for communication between the PC and the PLC. The software was developed with Visual C#.Net 2008 for monitoring and controlling. This user interference allows for controlling of the motor's travelling distance with a running strategy. The first and second destination can be defined and the system provides that the motor operates between these points continuously. The phase and velocity currents of the motor were shown and curved with the software. The existing position of the motor and the number of pulses were determined and displayed with a linear incremental encoder. The windings of the motor phases were energized depending on their position using a classical bridge converter. This PLC-controlled LSRM study leads industrial practices and the educational sector to highlight the importance of linear motion, which is used in many implementations. Furthermore, all types of LSRMs can be used in the developed system.

关键词： Linear motor position control linear switched reluctance motor LSRM monitoring software programmable logic controller PLC

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A concurrent design methodology of a production system for virtual commissioning

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CONCURRENT ENGINEERING-RESEARCH AND APPLICATIONS 2013年第2期21卷 129-140页

作者： Ko, Minsuk Ahn, Euikoog Park, Sang C. Ajou Univ Dept Ind & Informat Syst Engn Suwon 443749 South Korea

In this article, a concurrent design procedure of a production system is presented, which supports the virtual commissioning between a real controller and a virtual plant consisting of virtual devices. To achieve the concurrency, we split a virtual device model into two parts, a physical device model (a geometric model with kinematics for the motion programming of tasks) and a logical device model (a behavioral model to interact with a real controller). The whole design procedure consists of four major steps: (1) process design, (2) physical device modeling, (3) logical device modeling, and (4) system control modeling. First, the process design step identifies effective manufacturing processes and produces the sequence of operations. Once the sequence of operations is obtained at Step 1, then the other three steps can be performed concurrently without interfering each other. All the three concurrent steps start from the sequence of operations, and a detailed procedure for each of the step has been developed. The concurrent attribute of the proposed design procedure significantly contributes to the saving of the delays in time to market. The proposed design procedure has been implemented and tested for various examples.

关键词： Virtual commissioning simulation programmable logic controller virtual plant concurrent design

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A BEHAVIOR-PRESERVING TRANSLATION FROM FBD DESIGN TO C IMPLEMENTATION FOR REACTOR PROTECTION SYSTEM SOFTWARE

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NUCLEAR ENGINEERING AND TECHNOLOGY 2013年第4期45卷 489-504页

作者： Yoo, Junbeom Kim, Eui-Sub Lee, Jang-Soo Konkuk Univ Div Comp Sci & Engn Seoul 143701 South Korea Korea Atom Energy Res Inst Man Machine Interface Syst Team Taejon 305353 South Korea

Software safety for nuclear reactor protection systems (RPSs) is the most important requirement for the obtainment of permission for operation and export from government authorities, which is why it should be managed with well-experienced software development processes. The RPS software is typically modeled with function block diagrams (FBDs) in the design phase, and then mechanically translated into C programs in the implementation phase, which is finally compiled into executable machine codes and loaded on RPS hardware - PLC (programmable logic controller). Whereas C Compilers are fully-verified COTS (Commercial Off-The-Shelf) software, translators from FBDs to C programs are provided by PLC vendors. Long-term experience, experiments and simulations have validated their correctness and function safety. This paper proposes a behavior-preserving translation from FBD design to C implementation for RPS software. It includes two sets of translation algorithms and rules as well as a prototype translator. We used an example of RPS software in a Korean nuclear power plant to demonstrate the correctness and effectiveness of the proposed translation.

关键词： Behavior-Preserving Translation programmable logic controller Translator Function Block Diagram C Program

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PLC BASED ADAPTIVE FUZZY PID SPEED CONTROL OF DC BELT CONVEYOR SYSTEM

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INTERNATIONAL JOURNAL ON SMART SENSING AND INTELLIGENT SYSTEMS 2013年第3期6卷 1133-1152页

作者： Shah, Mohd Heidir Mohd Rahmat, Mohd Fua'ad Danapalasingam, Kumeresan A. Wahab, Norhaliza Abdul German Malaysian Inst Dept Ind Elect Kajang 43000 Selangor Malaysia Univ Teknol Malaysia Fac Elect Engn Dept Control & Mech Engn Utm Skudai 81310 Johor Malaysia

Conveyor belt system is one of the most common transfer systems used in industry to transfer goods from one point to another in a limited distance. It is used in industries such as the electro-mechanical/mechanical assembly manufacturing to transfer work piece from one station to another or one process to another in food industries. The belt conveyor system discussed in this paper is driven by a DC motor and two speed controllers. The PID speed controller is designed to provide comparison to the main controller which is the Adaptive Fuzzy PID Speed controller. Both controllers are implemented in a real hardware where the algorithm will be written in PLC using SCL language. The experimental result shows that Adaptive Fuzzy PID controller performs better and adapted to the changes in load much faster than the conventional PID controller. This project has also proved that PLC is capable of performing high level control system tasks.

关键词： DC belt conveyor system speed controller adaptive fuzzy PID programmable logic controller structured control language

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Formal component-based modeling and synthesis for PLC systems

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COMPUTERS IN INDUSTRY 2013年第8期64卷 1022-1034页

作者： Zhou, M. Wan, H. Wang, R. Song, X. Su, C. Gu, M. Sun, J. Tsinghua Univ Sch Software Beijing 100084 Peoples R China Minist Educ Key Lab Informat Syst Secur Beijing Peoples R China Guangxi Univ Nationalities Guangxi Key Lab Hybrid Computat & IC Design Anal Nanning 530006 Peoples R China Portland State Univ Portland OR 97207 USA Capital Normal Univ Sch Informat Engn Beijing Peoples R China

programmable logic controllers (PLCs) are widely used in industry. PLC systems are reactive systems which run cyclically. In each cycle, the system state is checked and the program is executed once to determine the system behavior for a single cycle. Development of PLC systems conventionally follows the V-model, but increasing demand for efficiency and reliability requires a new rigorous and rapid design flow. In this paper, we propose a component-based formal modeling and synthesis method for cyclic execution platforms and apply it to PLC. Our method consists of three main phases: modeling, verification and code synthesis. In the modeling phase, the BIP (Behavior-Interaction-Priority) framework which is flexible and expressive is used as the modeling language. Real-time behavior, which is intensely concerned in PLC systems, can be modeled as well. In the verification phase, the system model is translated to timed automata and checked by UPPAAL Verification helps to ensure correctness of the model and further increases reliability of the implementation. In the code synthesis phase, the software part of the system model is extracted and synthesized to cyclic code. Although the PLC software runs cyclically, the software model is not necessarily given in a cyclic manner. We propose an algorithm which can generate high-performance cyclic code from a model which describes the business work-flow. This feature significantly simplifies program development. A set of tools is implemented to support our design flow and they are applied to an industrial case study for a PLC system that controls dozens of physical devices in a huge palace. (C) 2013 Elsevier B.V. All rights reserved.

关键词： programmable logic controller Modeling Verification Code Synthesis

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Adaptive Control of a Non-Cylindrical Tank

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INTERNATIONAL JOURNAL OF ONLINE ENGINEERING 2013年第2期9卷 50-52页

作者： Nippert, C. R. Coburn, Rebecca Shea, Brendon Roth, Michael Harrell, Clinton Owusu, Edward Widener Univ Dept Chem Engn Chester PA 19013 USA

A conical tank in which the diameter changes with the tank height, allows the use of feedback control used in complex nonlinear systems, such as adaptive control. This project modified an existing system of two interacting tanks by inserting a removable solid cone into one of the tanks. This modification created two new nonlinear configurations, one of which had a discontinuity. Optimal controller settings at different depths of liquid were found by minimizing the integral of the absolute error (IAE). These settings were used by an adaptive PID controller at a different settings, comparing the results to a conventional PID tuned to that setting.

关键词： Adaptive control nonlinear systems process control programmable logic controller

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Design and Research on the Control System of Magnetic Plate-type Seeding Production Line

Design and Research on the Control System of Magnetic Plate-...

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4th International Conference on Manufacturing Science and Engineering (ICMSE 2013)

作者： Yan, Xiaoyue Hu, Jianping Lu, Chuantong Wang, Xun Minist Educ Res Lab Modern Agr Equipment & Technol Zhenjiang 212013 Peoples R China

ISBN: (纸本)9783037856932

A new magnetic plate-type precision seeding production line and its control system were designed based on the magnetic seed-metering principle. The control system is consisted of DVP-40ES programmable logic controller and LJD-51-XB+ Mico controller Unit. The PLC control system controls the working flow of the production line. The MCU control system controls turnover movement of the sowing board and up-and-down movement of the seed case for whole tray seed-filling and sowing. Seeding tests for the magnetic powder coated rape seeds showed that the rate of single-seeding, over-seeding and miss-seeding were 90.2778%, 4.6875% and 5.0347% respectively. The seeding speed was 257 trays per hour, an average of each tray with 14s. It meets the requirements of precision seeding. The system design is reasonable and reliable.

关键词： Magnetic Plate-type Seeder Seeding Production Line programmable logic controller Micro controller Unit Control System

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