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Web-based solutions for monitoring and operating of technical processes may be characterized by a relatively short life time compared to automation applications. Thus, the GUI language XVCML has been developed to gain the continuance of visualization systems. XVCML provides generic graphical elements for modeling visualization solutions in a technology neutral way. However, conventional visualization...
Power consumption and thermal problems limit the single-core processors to be faster. Processor architects are therefore moving toward multi-core processors. Developers of embedded real-time systems however hesitates a shift to multi-core processors, especially for existing ldquolegacyrdquo systems which have been developed with single-core processor assumptions. These systems have been developed...
Technological advancements in communication and embedded computing lead to the increasing application of decentralized structures in automation and control. The decentralization adds new behavior in the form of - often non-deterministic - delays to the resulting networked control systems (NCS). To analyze a closed loop control system including network communication, simulation is a viable approach...
In typical manufacturing information systems often the vertical integration and the inter-process communication are achieved by separate technologies. Though many standards like OPC and PROFINET simplify these tasks even with integration of standard PC hard- and software, they need at some points specific equipment. The system described in this paper implements Web service functionality to distributed...
While ontologies are becoming an accepted measure for computational information mapping, the definition of ontologies can lead to dead ends when integration of information is to be facilitated. Specialized ontologies tend to be impossible for the use in different contexts than the one they were defined for. In order to make the interoperation of different ontologies with different specializations...
Scheduling analysis for simplified distributed real-time systems, where the worst case execution time (WCET) of each task is fixed, is well understood. However, often the simplified assumption of fixed WCETs lacks accuracy, e.g. it may have a high variance depending of internal task states. Even if the transition relation of taskpsilas internal states is known, traditionally applied scalable analysis...
This paper shows a model-based design trajectory for the development of real-time embedded control software using virtual prototyping. As a test case, a Cartesian plotter is designed. Functional correctness of the plotter software has been ensured by means of co-simulation using a virtual prototype before deploying it on target. Except for the interface implementation, the software that is used in...
Frequent changes in the production requirements demand for improvement of adaptation and modification ability of production systems. To address these requirements we propose a concept and system architecture in order to provide the reconfigurability of machine tool systems in assembly shop floor. This approach allows machines and plants to flexibly adapt themselves to changing demands and interact...
Microshrinkages are known as probably the most difficult defects to avoid in high-precission foundry. Depending on the magnitude of this defect, the piece in which it appears must be rejected with the subsequent cost increment. Modelling this environment as a probabilistic constellation of interrelated variables allows Bayesian networks to infer causal relationships. In other words, they may guess...
The introduction of FlexRay in the automotive industry as well as the standardization efforts for the hardware and software architecture rise different challenges: How to efficiently integrate the new services in the system, how to validate the communication architecture with respect to the effects influencing the network? The research project TEODACS aims at answering these questions. We present...
This work describes a flexible gateway platform for automotive networks which is currently developed at the University of Applied Sciences Technikum Wien. In contrast to most available gateways the platform described herein can be configured and expanded to a high degree concerning both hardware and software by using a programmable system-on-chip architecture. The proposed solution is not limited...
Programmable logic controllers (PLCs) play a significant role in the control of production systems and sequential function chart (SFC) is one of the main programming languages. The reaction time of a PLC is a fundamental matter in discrete event control systems. We show that the reaction time of PLC depends greatly on the SFC structure, on the events sequence and also on the algorithm that executes...
In a research project the transportation of objects in production systems is realized by throwing and capturing. At the current state of the work, objects with masses up to 100 g are thrown over distances of 3 m. In the current approach the positions of the flying objects are measured on their trajectories by a camera system and a robot is directed to a variable capturing point. In this paper a new...
In recent years, there has been a significant emphasis on developing control methodologies to handle network delays in networked control systems (NCS) using different approaches. Nevertheless, there are not many practical control methodologies to deal with data dropouts. In many applications the assumption of small dropout rates does not hold. In this paper, a new strategy is developed to deal with...
While current manufacturing systems are built to avoid uncertainty, the increase of setup reconfiguration frequency and ever higher numbers of variants produced on the same systems motivate the exploration of new approaches to manufacturing and manufacturing control. In this paper we discuss the application of plan based controllers and transformational planning in manufacturing. Autonomous control...
Several interpretations and implementations of the IEC 61499 standard have been published. The interpretations have been made with a certain desired run-time behavior in mind. One group of interpretations focuses on providing a well analyzable behavior whereas the others have been proposed to increase runtime performance. However, there has not been an interpretation of the standard having usability...
This paper seeks to establish within a formal framework for modeling the robust control laws of manufacturing systems to temporal and non-temporal constraints. The goal is to conclude the type from the production system robustness. A methodology of robust control construction generating the margins of passive and active robustness is elaborated. The redundancy of the robustness of the elementary parameters...
Industrialized production and IT have being severely penetrating in food industry sector since the first industrial era. Hence, production has followed automation enhancements throughout the years, becoming more efficient, closer connected and interacting to higher manufacturing levels, and advanced both in quantity and quality. This paper introduces an integrated system applying to the aquaculture...
Current industrial applications demand the design of more and more complex, safe and trustworthy control systems which exhibit a high degree of flexibility and reutilization. To achieve this, the engineering process has to be improved through the integration of the tools involved in the development process. To achieve this goal the definition of Markup Languages for factory automation has been proposed...
The paper presents study about the Product Service System, digital signal processing and IEC 61499 Standard. Product Service System talks about the importance of providing after sales service and some of its key concepts. Digital signal processing involves signal processing using various algorithms that can perform condition monitoring for oil and gas pipelines and IEC 61499 Standard is used to model...
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