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63rd IEEE Conference on Decision and control, CDC 2024

作者： Zahn, Frederik Kleinert, Tobias Hagenmeyer, Veit Karlsruhe Institute of Technology Institute for Automation and Applied Informatics Karlsruhe Germany Rwth Aachen University Chair of Process Control Engineering Aachen Germany

ISBN: (纸本)9798350316339

Differential flatness has been defined in the literature for continuous time dynamical systems and for discrete time systems. We define flatness of automata from the perspective of behavioral systems theory, and synthesize a flatness definition for hybrid automata. These new definitions allow for feedforward trajectory generation for flat hybrid automata. Additionally, we provide necessary and sufficient conditions of hybrid automaton flatness for different types of continuous state constraints and switching conditions, and how to compute whether a hybrid automaton is flat. We illustrate feedforward trajectory generation based on our findings for a robotic manipulator example. © 2024 IEEE.

关键词： Continuous time systems

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Feedforward control of flat hybrid automata: a behavioral systems theory approach

Feedforward control of flat hybrid automata: a behavioral sy...

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IEEE Conference on Decision and control

作者： Frederik Zahn Tobias Kleinert Veit Hagenmeyer Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Karlsruhe Germany Chair of Process Control Engineering RWTH Aachen University Aachen Germany

ISBN: (数字)9798350316339

ISBN: (纸本)9798350316346

关键词： Discrete-time systems Sufficient conditions Automata Switches Manipulators control systems Hybrid power systems Trajectory Feedforward systems Dynamical systems

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Mapping of Standardized State Machines to Utilize Machine Learning Models in process control Environments 1

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Workshop on Impact and Opportunities of Artificial Intelligence in the Steel Industry, 2020

作者： Grothoff, Julian Kleinert, Tobias RWTH Aachen University Chair of Process Control Engineering Turmstr. 46 Aachen52064 Germany

ISBN: (数字)9783030693671

ISBN: (纸本)9783030693664

Digitalization is a driving force for new applications of artificial intelligence in the industrial context. In the last decade new and optimized machine learning methods, tools and corresponding Hardware became available. But their utilization in industrial applications is very challenging, due to different requirements and conditions. In order to bridge that gap, trained machine learning algorithms need to be integrated in current control system environments, which implies a setup of the application program based on components of similar interfaces and a standardized behavior. Hence, a mapping of well-known and broadly applied state machines, such as the ANSI/ISA-88 (also known as PackML) states and modes for batch control, to generic interactions of reinforcement learning algorithms is presented in this contribution. Additionally, a simplistic proof of concept using reinforcement learning in a simulation of a coil transport system for cold rolling steel mills is shown. Moreover, the interaction of a reinforcement learning agent with its standardized state machines is described for learning and interference phases. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Reinforcement learning

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Cross-industry state of the art analysis of modular automation 21st

Cross-industry state of the art analysis of modular automati...

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21st International Congress of Measurement and Automation Technology, AUTOMATION 2020

作者： Grüner, Sten Hoernicke, Mario Fachinger, Gerrit Grothoff, Julian Cordes, Sophia Fay, Alexander ABB Corporate Research Center Ladenburg Germany Chair of Process Control Engineering RWTH Aachen Aachen Germany Professur für Automatisierungstechnik Helmut-Schmidt-Universität Hamburg Germany

ISBN: (纸本)9783180923765

Modular production is a persistent trend in both manufacturing and process industry. For process industry, the adoption of NAMUR Module Type Package (MTP) progresses rapidly including first commercial products. In the manufacturing industry, one prominent representative of modular production in factory automation is the PackML standard for packaging machines. Despite similar concepts and business advantages, requirements and current technical realization of module description and process orchestration differ across the industries. This paper is a state-of-the-art analysis of modular automation concepts. Along with MTP and PackML we also discuss the process control approach developed in scope of publicly funded BaSys 4.2 project and validated in a demonstrator. Our results bring advantages for manufacturers, integrators and operators of modular automation plants, especially in mixed discrete/process applications. We open a perspective for long-term convergence of the standards’ aspects and help to define mid-term coexistence strategies especially for mixed applications. © 2020, VDI Verlag GMBH. All rights reserved.

关键词： Factory automation

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On Optimal control of Flat Hybrid Automata

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IFAC-PapersOnLine 2020年第2期53卷 6800-6805页

Recently, Flat Hybrid Automata (FHA) were introduced as a new model class of hybrid systems. In order to answer the evident question of an optimal operation of the new class of FHA, a well-posed optimization problem definition for FHA is presented. This problem formulation also includes costs on discrete–state transitions and switching actions. We present a solution for a reduced problem: FHA with autonomous switching. For these, a new algorithm is introduced which solves the optimal control problem. The application of this optimization algorithm is shown with an electrical network example.

关键词： Flat hybrid automata differential flatness hybrid switched systems modeling optimal control of hybrid systems

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A Secure Gateway for the Cooperation of Information Technologies and Industrial Automation Systems

A Secure Gateway for the Cooperation of Information Technolo...

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Annual Conference of Industrial Electronics Society

作者： Mahyar Azarmipour Christian von Trotha Caspar Gries Tobias Kleinert Ulrich Epple Chair of Process Control Engineering RWTH Aachen University Aachen Germany SYSGO GmbH Office Mainz Klein-Winternheim Germany

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154152

Promoting digitalization in industrial automation drives usage of new technologies, communication and information models. Thereby providing a platform for industrial automation to interact cooperatively with information technologies plays a crucial role to increase its digitalization and intelligence. An important factor in this interaction is security. The current automation systems do not cooperate in a high interconnected environment but offer a high security level. In contrast to the current automation systems, the future automation systems in context of Industry 4.0 offer high interconnectedness but require a security solution. The interaction deals with retrieving and processing data from the process control system and sending feedback to it. For retrieving data from automation systems different concepts are discussed such as the NAMUR Information diode. The goal of this paper is to develop a realization of a secure gateway for the interaction of information technology and automation systems. Furthermore, an approach to integrate feedback of information technology into process control is discussed.

关键词： Security process control Automation Virtualization Logic gates Containers Virtual machine monitors

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Model Transformation for Asset Administration Shells

Model Transformation for Asset Administration Shells

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Annual Conference of Industrial Electronics Society

作者： Torben Miny Michael Thies Ulrich Epple Christian Diedrich Chair of Process Control RWTH Aachen University Aachen Germany Institute for Automation Engineering (IFAT) Otto-von-Guericke Universitat Magdeburg Magdeburg Germany

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154152

In the scope of Industry 4.0 (I40), one goal is the standardized access to asset information and asset services using standardized submodels (submodel templates) in the Asset Administration Shell. Since submodel templates are modeled by different groups of people, the same asset information will be contained in several submodel templates. For automatic generation of new submodels based on existing information from other submodels, model transformation can be a solution. Therefore, in this contribution, we present a guideline on how to develop a new model transformation language for a given use case and apply this guideline to the concrete use case (model transformation for Asset Administration Shells). As a result, we define of the abstract syntax of a customized model transformation language called AASMTL.

关键词： Unified modeling language Object oriented modeling Syntactics Guidelines Semantics Tools Industries

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Recipe Based Skill Matching

Recipe Based Skill Matching

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IEEE International Conference on Industrial Informatics (INDIN)

作者： Haitham Elfaham Julian Grothoff Torben Deppe Mahyar Azarmipour Ulrich Epple Chair of Process Control Engineering RWTH Aachen University Aachen Germany

Capability matching is an important objective in automating industrial production. Prior attempts to perform capability matching require the introduction of various new tools rendering them to be hard to achieve or integrate. We propose a capability matching concept that relies fundamentally on the standardized recipes offering a seamless integration into the available infrastructure.

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PLC 4.0: A control System for Industry 4.0

PLC 4.0: A Control System for Industry 4.0

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Annual Conference of the IEEE Industrial Electronics Society

作者： Mahyar Azarmipour Haitham Elfaham Caspar Gries Ulrich Epple Chair of Process Control Engineering RWTH Aachen University Aachen Germany SYSGO GmbH Klein-Winterheim Germany

Industry 4.0 follows the goal of promoting digitalization of manufacturing. Thereby converging information technologies and automation play a crucial role. These goals do not only require new softwares and information models but also require hardwares that offer more intelligence and bring more agility in production systems. The current developments in field of sensors introducing sensor 4.0 is an example of adapting the hardwares to industry 4.0 requirements. This is also necessary for other participating hardwares such as control devices. The control devices must be also designed to act more intelligent and provide interfaces to the other technologies like cloud computing and Cyber Physical Systems. In this paper, a new architecture for control devices will be introduced that operates as a bridge between industrial automation applications and IT technologies and provides a virtual platform for tests and simulations that run parallel to the control procedure. We refer to this architecture as "PLC 4.0".

关键词： Automation Hardware Cloud computing Virtualization Virtual machine monitors Containers Computer architecture

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An Educational Framework for process control Theory and engineering Tools

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IFAC-PapersOnLine 2016年第6期49卷 46-51页

作者： Wagner, Constantin Schüller, Andreas Fleischacker, Christopher Epple, Ulrich Chair of Process Control Engineering RWTH Aachen University Aachen Germany

The student's education conducted by the chair of process control engineering at rwth Aachen University involves the two elements lecture and laboratory course. Due to the continuously rising number of students and the resulting variety of student's technical backgrounds, it is no longer possible to offer laboratory sessions to all registered students. As a result, we established a framework that allows the students to experiment by using the theoretical principles from the lecture without having to participate in the laboratory courses. That means, the framework has to cover a whole range of different aspects involving the planning and engineering of a plant by means of Piping and Instrumentation Diagrams, the physical simulation and the eventual implementation of the automation application. Our framework concept, while not originally part of the Blended Learning project, represents a teaching program that well aligns with the Blended Learning approach supported by rwth Aachen University. © 2016

关键词： process control control engineering control theory Education computing Students Teaching Technical presentations Automation applications Instrumentation diagrams Laboratory sessions Lecture and laboratories Model based controls Physical simulation Sequence control Technical background

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