Voltage sag is one of the most important power quality problems affecting sensitive industrial equipment. Control panels consist of one or several units of programmable logic controllers (PLC), Contactors and Adjustab...
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Contemporary digital systems must be based on the "System-on-Chip - SoC" concept. An interesting style for SoC design is the GALS paradigm (Globally Asynchronous, Locally Synchronous), which can be used to i...
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programmablelogic Controller (PLC) Kit for teaching and learning is developed based on the existing PLC Trainer that is not able to achieve the objective and learning outcome in enhancing the hands on skill aspect th...
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There are many off-the-shelf programmable logic controllers (PLC) available on the market - not only standard, but so-called safety PLCs as well. These are primarily designed to be used in industrial safety relevant a...
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Modern system-on-chip (SoC) design cycle strongly depends on secure exchange of intellectual properties (IPs) between core-authors, integrators, foundries etc. However the sharing of IP between authorities involves hi...
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The integration of robotics, conveyors, sensors, and programmable logic controllers into manufacturing and material handling processes requires engineers with technical skills and expertise in these systems. The coord...
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The integration of robotics, conveyors, sensors, and programmable logic controllers into manufacturing and material handling processes requires engineers with technical skills and expertise in these systems. The coordination of assembly operations and supervisory control demands familiarity with mechanical and electrical design, instrumentation, actuators, and computer programming for successful system development. This paper presents an educational mechatronics laboratory that encourages multi -disciplinary hands-on engineering discovery within team settings. Three focused progressive experiments are reviewed that allow students to program and operate a programmablelogic controller, a traditional conveyor system, and a distributed servo-motor based conveyor. The students also program and implement two robotic arms for material handling applications. The equipment, learning objectives, and experimental methodology for each laboratory are discussed to offer insight. A collaborative design project case study is presented in which student teams create a smart material handling system. Overall, engineering graduates have generally been required to learn material handling and other multidisciplinary concepts in the field, and therefore, a well-rounded engineering curriculum should incorporate mechatronics in both the classroom and laboratory. (C) 2007 Elsevier Ltd. All rights reserved.
In this paper, an example of the use of programmable logic controllers (PLC), computer programming, and computer interfacing, for teaching purposes and student projects implementation is presented. This is carried out...
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In this paper, an example of the use of programmable logic controllers (PLC), computer programming, and computer interfacing, for teaching purposes and student projects implementation is presented. This is carried out through the design and implementation of a mechanical ventilation system that can be used on respiratory patients and controlled by a PLC. The physical control and operation of the ventilator are accomplished by the PLC via analog input and output modules located within the PLC chassis. Operator adjustment, mode selection, and patient monitoring are accomplished using a personal computer running a visual basic application designed specifically for this project. The operator interface mimics the look of a traditional ventilator control chassis. A serial data connection provides the communication path between the PLC and the personal computer. Using a PLC and a computer interface (HMI) as the respirator control system has distinct advantages over traditional microprocessor control systems. These include: the operation and adjustment of the respirator can be accomplished at a location other than the location of the respirator, alarm conditions can also be determined and evaluated from a remote location, reprogramming of the system can be easily accomplished onsite should newer respiratory modes become available. Through the use of a PLC and a HMI many different applications, similar to the one presented here, can be designed and implemented. This senior capstone design project was designed and implemented by an electrical engineering technology student as part of graduation requirements.
This paper presents an approach to enable automatic identification and generation of operation strategies for field-level automation software of manufacturing systems. Contrary to the traditional way of implementing f...
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This paper presents an approach to enable automatic identification and generation of operation strategies for field-level automation software of manufacturing systems. Contrary to the traditional way of implementing field control software, we suggest the modelling and implementation of machine capabilities as basic operations. Driven by the idea to describe what a system is able to do in contrast to traditional formulation of processes in automation software engineering, it is possible to derive necessary sequences of control operations automatically. This results in a framework for automatic generation of such operation strategies to limit the re-engineering effort of field-level automation control software in case of changed requirements caused by modifications of the technical system.
This paper presents an original approach of safe control synthesis of manufacturing systems. This is an extension of the work that CReSTIC has led for several years on the definition and design of a logic filter (plac...
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This paper presents an original approach of safe control synthesis of manufacturing systems. This is an extension of the work that CReSTIC has led for several years on the definition and design of a logic filter (placed into a programmablelogic Controller (PLC)) robust to control errors, and formally verified using a model checker. The proposed approach, which separates the functional control part from the safety control part, is simple to implement and ensures that the designed controller is safe. The methodology is based on the use of safety constraints coming from the filter in order to get the most permissive safe controller. This controller is then constrained by functional constraints. The approach is illustrated by using an example of sorting boxes simulated using the ITS PLC software from the Real Games company ( *** ). The control algorithm is presented and allows to result in a safe control, may be simpler than a conventional approach based on a specification in GRAFCET (IEC 60848), that does not distinguish the functional aspect from the safety aspect. This approach presents interesting perspectives like the management of several operating modes.
This paper presents an original approach of safe control synthesis of manufacturing systems. This approach is based on the use of a logic filter (placed at the end of PLC (programmablelogic Controller)) robust to con...
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This paper presents an original approach of safe control synthesis of manufacturing systems. This approach is based on the use of a logic filter (placed at the end of PLC (programmablelogic Controller)) robust to control errors, and formally validated using a model checker. The proposed approach, which separates the functional control part from the safety control part, is simple to implement and ensures that the designed controller is safe. The methodology is based on the use of safety constraints coming from the filter in order to get the most permissive safe controller. This controller is then constrained by functional constraints. The approach is illustrated by using an example of sorting boxes simulated using the ITS PLC software from the Real Games company ( *** ). The control algorithm is presented and allows to result in a safe control, may be simpler than a conventional approach based on a specification in GRAFCET (IEC 60848), that does not distinguish the functional aspect from the safety aspect. This approach involves a new way to see the control of manufacturing systems and presents interesting perspectives like the management of several operating modes.
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