Model-Based Development Concept for Hybrid Systems to Support Process Engineers in Thermo-Mechanical Process Development

Bayrak, Gülden; Vogel‐Heuser, Birgit

doi:10.3182/20101006-2-pl-4019.00030

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…Simulink is most appropriate for the design and modeling of controllers and is an environment often used. We showed in [1,3] that the time behavior of the controller on PLC is equal to the time behavior of the corresponding Simulink model. In spite of this result external disturbing factors may occur during runtime, which may influence the time behavior in an unpredictable way.…”

Section: The Runtime Process Monitoring and Endconditionmentioning

confidence: 98%

“…In this case it is necessary to extend the controller in order to make it possible to be enabled. We simply take a controller imported from Simulink [1,3] and extend it with the condition enabled.…”

Section: Demonstration Example In Technologyeditormentioning

confidence: 99%

“…A manual transformation of the controller model to Programmable Logic Controller (PLC) is not necessary any more. Developed by the authors [1], [3] a code generator allows an automatic model transformation from a discrete control loop in Simulink into Continuous Function Chart (CFC) taking PLC properties into consideration. CFC is not part of IEC 61131-3 but it is supported by many tools such CoDeSys or STEP7.…”

Section: Introductionmentioning

confidence: 99%

“…control engineer, process engineer, software engineer and programmer), on the other hand the implementation and the time behavior of a hybrid system, which means the interaction between discrete and continuous behavior of the system, have to be correct. The selection of appropriate modeling languages and their coupling are shown in [1]. The process engineers' (forming technologists) requirements [2] in the field of forming technology was the selection criterion in favor of the activity diagram as modeling language for the superordinate process steps.…”

Section: Introductionmentioning

confidence: 99%

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Integration of control loops in an UML based engineering environment for PLC

2011

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This paper presents a UML-based engineering environment for the design and implementation of hybrid systems in forming technology. The discrete superordinate steps of forming technology are programmed as an activity diagram (UML). Some process steps include control loops which are modeled in Simulink. The control loops are automatically generated into Continuous Function Chart (CFC) in Programmable Logic Controller (PLC). The paper describes how the controllers can be distributed with different task cycle times and how the performance of these controllers can be ensured during runtime. In the process, the activity diagram is compared with the standard IEC 61499 considering the aspects usability and execution/implementation.

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Section: The Runtime Process Monitoring and Endconditionmentioning

confidence: 98%

Section: Demonstration Example In Technologyeditormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integration of control loops in an UML based engineering environment for PLC

2011

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“…In contrast, the number of products on a belt or in a switch is specified by noncontinuous values. Considering the connection of these characteristics, the system can be modeled as hybrid system [3].…”

Section: State Of the Artmentioning

confidence: 99%

Bridging the gap between discrete and continuous simulation of logistic systems in production based on the Modelica modeling language

Regulin

Krooss

Schütz

et al. 2015

2015 IEEE 20th Conference on Emerging Technologies &Amp; Factory Automation (ETFA)

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The demand for mass-customized products is increasing steadily. As a consequence, the requirements regarding flexibility and efficiency of automated production systems and their logistic parts are increasing as well. In order to evaluate different plant designs before the commissioning or due to necessary reconfigurations, model-based approaches in combination with simulation techniques can be applied. Therefore, the interaction of transported load and physical aspects of plant components, e.g. motor current, needs to be described and evaluated. To bridge the gap between the time-discrete behavior of manufactured products, i.e. their occurrence, and the continuous characteristics of a transportation system's modules, i.e. differential equations, in this work a model interface was developed and integrated into model classes of the Modelica modeling language. The correct behavior of the particular library items has been proven by tests of the logical behavior and the comparison to a real conveyor belt drive system.

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