Emerging Technologies and Factory Automation, 1999. Proceedings. ETFA '99. 1999 7th IEEE International Conference on

18-21 Oct. 1999

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  • 1999 7/sup th/ IEEE International Conference on Emerging Technologies and Factory Automation [front matter]

    Publication Year: 1999, Page(s):i - xviii
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  • Modeling, simulation and perturbation analysis of continuous flow models

    Publication Year: 1999, Page(s):1529 - 1530 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (115 KB)

    Summary form only given. A generic approach to modeling, simulation and sensitivity analysis of continuous flow processes is described. Based on a single-server device, it can serve as a building block in various network configurations, and its application can result in fast simulation and unbiased sensitivity analysis estimators. View full abstract»

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  • Author's index

    Publication Year: 1999, Page(s):1567 - 1573
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    Freely Available from IEEE
  • Cycle time computation in deterministically timed weighted marked graphs

    Publication Year: 1999, Page(s):1037 - 1046 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    This paper considers the minimum cycle time (MCT) computation in deterministically timed weighted marked graphs (WMGs) under infinite server semantics. A transformation from a live and bounded WMG system into a live and bounded MG system is proposed in which the untimed behavior (represented by the Petri net language) and the minimum cycle time are preserved. By applying the well known LPP to the ... View full abstract»

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  • SICODI: a configurable real-time distributed control system

    Publication Year: 1999, Page(s):1265 - 1274 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (956 KB)

    Distributed control systems (DCS) have been, in the last years, the focus of some proposed and de facto standardizations. The paper describes the configuration aspects of continuous and discrete event control in a DCS implementation called SICODI, and the degree of integration between them. The communication properties when SICODI takes part in a training simulator are presented, and the communica... View full abstract»

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  • Identification and control of a generic-type plant using genetic algorithms

    Publication Year: 1999, Page(s):953 - 954 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    This work deals with the automatic control of a system without the intervention of an operator. It consists of the identification of the equations that define the behaviour of the plant by means of a genetic algorithm, and the calculation of a regulator using the identification results. Genetic algorithms are useful for system identification because of their power in searching for an optimal solut... View full abstract»

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  • Including object-oriented properties in the PLC's programming languages

    Publication Year: 1999, Page(s):1029 - 1034 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    The PLC programming is designed for a medium user of this equipment. Hence, object-oriented qualities can not be created in the same way established for higher languages like the C++, Java, Eiffel. However, they should fulfil the theoretical principles that govern them. In ALS 4.0 programming language a hierarchy of classes is set in three big trees which include the areas of application of this e... View full abstract»

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  • Design of real time software for industrial process control

    Publication Year: 1999, Page(s):1259 - 1263 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    The paper describes the details of, and the experiences gained from, a case study undertaken by the authors on the design and implementation of a complex control system for a dosage industrial process used in a manufacturing industry. The goal was to demonstrate that industrial real time control systems could be implemented using a high level programming language and some suitable operating system... View full abstract»

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  • Open control architecture for discrete manufacturing automation

    Publication Year: 1999, Page(s):1213 - 1224 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    This paper presents results of the European ESPRIT project 8823 DCC (discrete cell control), aimed to define the reference architecture of a cell controller, describing the required communication and information infrastructure, applications and engineering support. Based on this architecture, an engineering methodology and a set of supporting tools (called DCC-Core) have been developed and validat... View full abstract»

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  • A specific communication study for wide irrigation systems with integrated power transmission

    Publication Year: 1999, Page(s):841 - 847 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    Water volumes for agriculture copes with the water scarcity (drought), which is a big problem for this sector. Agrarian Exploitations are introducing new Irrigation Systems with high technologies to prevent this problem, especially in the Mediterranean Region. An Irrigation System consists of several elements: aquifers, water pumps, a hydraulic network (pipes) and a great number of electro-values,... View full abstract»

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  • System inductive modeling using genetic programming with a genetic algorithm for parameter adjustment

    Publication Year: 1999, Page(s):949 - 952 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    System modeling is highly relevant in the automation and simulation processes. Until now, there have been two main ways to deal with the problem. The first is to collect the equations, normally differential, which direct the dynamics of the system and to solve them mainly by the S transform. The other way is to collect enough data from the process and, based on a predefined structure of the model,... View full abstract»

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  • Constrained MIMO self-tuning composition control in cement industry

    Publication Year: 1999, Page(s):1021 - 1028 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The main goal of the raw meal blending control in cement industry is to maintain near the reference moduli values and to decrease the variation of the chemical composition rejecting the disturbances. In this paper, the proposed constrained self-tuning controller deals with not only the quality control but quantity control as well. This is accomplished by inserting a energy term into the quadratic ... View full abstract»

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  • Design and development of an industrial monitoring system using Windows NT as a real-time operating system

    Publication Year: 1999, Page(s):1249 - 1257 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    There has been increasing interest in the industry for the development of new technologies where real time systems could improve the quality of products and provide cost savings. Hence, a monitoring system is needed with real time constraints. Manufacturing is one of the fields in which more technological improvements have emerged during the last few years, with special interest in integrated manu... View full abstract»

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  • Using objects collaboration to model the control of an industrial system

    Publication Year: 1999, Page(s):1207 - 1212 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    Our aim is to define a structured approach and language elements in order to produce a software to simulate an autonomous industrial control system at first time and then to extract the sub-part of this software that will be implemented in the target material used for control. We propose a strong work hypothesis on the generic hybrid dynamic system modeled. We use an object approach and especially... View full abstract»

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  • Smart reconfigurable miniature vision system for mobile robots

    Publication Year: 1999, Page(s):1495 - 1499 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The robot vision system presented consists of a PCB with a hardware-reconfigurable image processor, and a PCB with a standard commercial microprocessor. The microprocessor board interfaces with the host robot, configures the hardware of the image processor and runs the high-level image algorithms. Both boards occupy a volume of 10×10×3 cm3 and consume less than 1A View full abstract»

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  • Performance evaluation of four field buses

    Publication Year: 1999, Page(s):881 - 890 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    In this article, a comparative study of the performance of the CAN, the Profibus-DP, the Profibus-FMS and the Modbus Plus field buses is carried out. An analytical approach is adopted to evaluate the performance of the networks in an event-driven system in terms of throughput and responsiveness. Cyclic data exchanges are analysed in a deterministic way in terms of the bandwidth consumed. Finally, ... View full abstract»

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  • Guaranteeing DCCS timing requirements using P-NET fieldbus networks

    Publication Year: 1999, Page(s):831 - 840 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    In this paper, we analyse the ability of the P-NET fieldbus network to cope with the timing requirements of a Distributed Computer Control System (DCCS), where messages associated to discrete events should be made available to a distributed application within a maximum bound time. The major contribution of this paper is the integration of a pre-run-time schedulability analysis of the P-NET protoco... View full abstract»

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  • Optimal design of irrigation networks using a genetic algorithm

    Publication Year: 1999, Page(s):941 - 947 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    Irrigation installations consist of a water distribution network and a computer system to control it. In the design of water distribution network several requirements have to be met. The problem of designing the irrigation network has been solved using different heuristic methods which do not assure that the network design is optimum. This paper describes a genetic algorithm for designing an optim... View full abstract»

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  • Framework for managing intranet-based applications

    Publication Year: 1999, Page(s):1011 - 1019 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    This paper focuses on the intranet technology as a solution to the organizing of the information system within companies in order to coordinate the activities of the various actors involved efficiently. The functional and organizational structure of companies guides the informational structure of their information system. The methodological basis underlying the design of information systems are pr... View full abstract»

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  • Programmable logic design for an encoder-based velocity sensor in a DSP-controlled motion system

    Publication Year: 1999, Page(s):1243 - 1247 vol.2
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The paper presents a dedicated hardware interfacing an optical incremental encoder and DSP-controlled motion system. Different velocity sensing techniques and methods are discussed. One of them is chosen and implemented, fulfilling the main objectives proposed. The first objective is to reserve the computational power of the DSP for control tasks, avoiding the processor's use for sensing tasks lik... View full abstract»

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  • Low cost adjustable speed sensorless 12/8 switched reluctance drive for low power and low voltage applications

    Publication Year: 1999, Page(s):1201 - 1206 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    This paper is devoted to sensorless control of 12/8 switched reluctance motor drives for low power and low voltage applications, which require adjustable speed. For simplicity, fault tolerant features, size reduction, better adaptation to harsh environments and economy a sensorless control implemented in a cheap and well known 8-bit microcontroller using two different clock frequencies are conside... View full abstract»

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  • Optimizing costs and processing times under variable external processing constraints

    Publication Year: 1999, Page(s):1107 - 1115 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    A technique is presented for analyzing complex production systems incorporating task durations, cost, and the impact of external factors. Processes are modeled as a network of dependent tasks, in which the processing time for each task varies based upon external conditions such as product quality, weather, work stoppages, etc. Analysis and optimization techniques are provided to give greater accur... View full abstract»

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  • Ensuring safe obstacle avoidance in a shared-control system

    Publication Year: 1999, Page(s):1405 - 1414 vol.2
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (940 KB)

    This paper describes the Bremen Autonomous Wheelchair project. It shows that common static fire strategies for ultrasonic sensors are inherently unsafe and proposes a new adaptive fire strategy which delivers a complete coverage of the environment of the robot. Furthermore, a new obstacle avoidance approach for shared-control robotic systems is described in detail View full abstract»

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  • HITO-a tool for hierarchical control

    Publication Year: 1999, Page(s):1177 - 1183 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    This paper introduces the HITO software tool, an integrated control system oriented to implement hierarchical control in the process industry. HITO is dedicated to control multivariable processes using model predictive control technology connected with distributed control systems running in different operating characteristics. HITO is not only limited to some particular environments, manufacturers... View full abstract»

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  • Predicates and predicate transformers for the supervisory control of timed discrete event system

    Publication Year: 1999, Page(s):1081 - 1090 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    We approach the problem of controlling the behavior of a given real time discrete event system (RTDES) described in terms of its state trajectories by using predicates and predicate transformers. The timed supervisory predicate control problem (TSPCP) is introduced as the problem of synthesizing a supervisor for a given RTDES. So that, the set of legal predicates corresponds to the weakest predica... View full abstract»

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