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The IEC 61499 gives developers considerable freedom and offers several features that support reuse. Although this can help the adoption of the standard into an organization's development process, the range of design decisions can also harm the reusability of software, if components are developed with incompatible design principles. Guidelines are needed, but the unique backgrounds and market positions...
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In this paper an embedded system for the pollution control in automobiles is described. In particular, the focus is on the description of the control algorithm, which receives, as an input, a signal from a MEMS accelerometer and uses it to control the fuel injection rate, in order to reduce the toxic emissions from the exhaust gases. A DSP implementation and simulation results of the same are detailed
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In this paper, MASCONTROL, a multiagent system (MAS) for system identification and process control, is presented. This MAS implements a self-tuning regulator (STR) scheme. In this work, an ontology agent (OA) is included, using DAML+OIL as ontology language. From their experience, the authors consider this architecture highly useful for identification and control processes
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We propose an effective construction technology of the beef traceability system that conforms to the law relating to special BSE countermeasures to trace, track and indicate the history of beef products. This system makes it possible to share background information on beef between enterprises from producers to retailers by using Web EDI technology. The beef traceability system was implemented in September...
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Electronic coding of products and documents using RFID backed by the ubiquitous computing brings new business and secure life styles. The world smallest wireless silicon IC "mu-chip" storing a unique 128 bits ROM ID code number has been developed for a reliable automatic authentication through a network based secure ID management. Its extremely small size chip (0.4 mmtimes0.4 mm) with 50...
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Miniaturized thermal flow sensors based on thin film technology and Si-micromachining offer air-flow sensitivities in the cm/s range and respond within milliseconds. The descending slope of the sensor characteristic gives sufficient dynamic compression to extend the flow measurement range over five orders of magnitude. With a novel design approach advanced transduction principles become feasible,...
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The main objective of this paper is to present an innovative equipment for practical teaching in control engineering, paying special attention to its conceptualisation and its possibilities for the theoretical-practical training. The role of the control and automation issues applied to this prototype is discussed. A distributed control system (DCS) applied to this prototype and its possibilities will...
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Fabry-Perot interferometry (FPI) originally invented for spectroscopy is now evolving as a basic technology for ultra-fine dimensional stabilization and measurement. To this end, the light path length of an optical cavity and the wavelength of a laser source injected into the cavity have to be each other tuned through a set of frequency and/or displacement actuators driven by a sharp and narrow signal...
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This article summarizes the requirements for communication redundancy in the different market sectors for industrial automation. It reviews the different solutions for using standard Ethernet to fulfill requirements and proposes more special extensions to Ethernet to obtain this. The path forward is sketched. Focus is on ideas and concerns that must be taken when the standardization work of IEC in...
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Information system security for industrial plants is a topic of increasing importance. Effective and cost-efficient security solutions require some kind of industry consensus or standardization. This paper examines the interests of the various stakeholders in the industrial security field (e.g. society, plant owners, service providers, automation vendors, and consultants) and evaluates some of the...
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The move towards Ethernet based communication solutions in automation is accompanied by a need for determinism and real-time performance. The subject of this paper is the measured real-time performance across a switched Ethernet segment. Performance at 100 Mbps and 1 Gbps network speed was measured using UDP on Windows and Linux. Output stack times in the 8-16 mus range were measured with low processor...
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The specifics of process manufacturing have a great influence on a production management and the focus of production scheduling is to maintain stable production within given constraints. The paper presents a dedicated online algorithm that has been developed with the intention of predicting the adequate starting time for a single new batch in a system consisting of two chemical reactors sharing a...
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Each fieldbus device contains an internal set of data relevant mainly for automation and control tasks, but also suitable for maintenance purpose. In addition, other device-related data are available outside the device, like descriptions, instructions, or even pictures and multimedia files. Thus, the device can be treated as central part of a complex information set. This information set is used by...
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In today's production and assembly processes, conventional PLC-based architectures are state-of-the-art for control engineering and application design. These kinds of architectures cause high costs for engineering and maintenance, especially adaptation of applications and hardware modifications create intolerable overhead. Distributed automation systems built of mechatronic components help coping...
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We introduce a new methodology for the specification and the design of the control logic of automated manufacturing systems. Our aim is to make specification express just what is necessary earlier in the design process. This permits to produce an optimized work cycle for the system and makes both production recovery calculation and code generation easier. The methodology is based on a modular modeling...
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An increasing number of companies want to improve product traceability for several reasons: to meet stricter government regulations about food and medical safety, to cope with ever-stronger consumer demands to know exactly what they are buying, and to improve and protect the company's brand value through more transparent business operations. Two aspects of traceability are technically important: (1)...
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This paper presents the architecture, the system implementation and the performance evaluation of an innovative Internet-based service for object position tracing and tracking (T&T). It supports "full" T&T, as tracking data are not limited only to warehouse check-ins/checkouts, but are extended to the whole transport process, i.e., even when the traced item is on the road, taking...
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Recently companies focus on traceability in the factory to control the risk to the products. It is an important task to collect many IDs marked on the items and sections to realize traceability; much equipment for IDs collection is required in the factory. This paper discusses the application to traceability of the information-connection unit of the programmable logic controller (PLC). This unit has...
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Although power-line communication (PLC) is not a new technology, its use to support data communication with timing requirements is still the focus of ongoing research. A new infrastructure intended for communication using power lines from a central location to dispersed nodes using inexpensive devices was presented recently. This new infrastructure uses a two-level hierarchical power-line system,...
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Needless to say, an effective teaching approach plays a significant part in the dynamics of the educational process. Yet, there is not a ready made recipe that can be ideally suited to teach all courses. Thus, since the beginning of the educational process, many endeavors have been made to find that magic/optimal teaching method that suits everyone, everywhere at optimal time and cost. The material...
