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检索条件"任意字段=5th IFAC Symposium on Modelling and Control in Biomedical Systems"

共 781 条记录，以下是411-420 订阅

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Development of plant DiD Risk Monitor system for NPPs by utilizing UML modelling technology

Development of plant DiD Risk Monitor system for NPPs by uti...

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13th ifac/IFIP/IFORS/IEA symposium on Analysis, Design, and Evaluation of Human-Machine systems (HMS)

作者： Yoshikawa, Hidekazu Nakagawa, Takashi Symbio Community Forum Kyoto Japan Prime Syst Lab Co Ltd Kawanishi Japan

A new risk monitor system is under development which can be applied not only to prevent severe accident in daily operation but also to serve as to mitigate the radiological hazard just after severe accident happens. the system simulates these applied situations, by generating interactions among all actors such as the plant and related people coping with the accident. In this paper, the plant DiD risk monitor is developed utilizing Unified Modeling Language (UML) to model actors' knowledge and express the interactions. Case study to confirm functionality and ability of DiD risk monitor is also introduced by showing examples for Station blackout accident in conventional PWR plant in Japan. (C) 2016, ifac (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： defense-in depth risk monitor system object oriented program unified modeling language state chart diagram sequence diagram

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Perpetual Learning Framework based on Type-2 Fuzzy Logic System for a Complex Manufacturing Process

Perpetual Learning Framework based on Type-2 Fuzzy Logic Sys...

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Baraka, Ali Panoutsos, George Cater, Stephen Univ Sheffield Dept Automat Control & Syst Engn Mappin St Sheffield S1 3JD S Yorkshire England TWI Ltd Welding Inst Wallis Way Rotherham S60 5TZ S Yorkshire England

this paper introduces a perpetual type-2 Nemo-Fuzzy modelling structure for continuous learning and its application to the complex thermo-mechanical metal process of steel Friction Stir Welding (FSW). the 'perpetual' property refers to the capability of the proposed system to continuously learn from new process data, in an incremental learning fashion. this is particularly important in industrial/manufacturing processes, as it eliminates the need to retrain the model in the presence of new data, or in the case of any process drift. the proposed structure evolves through incremental, hybrid (supervised/unsupervised) learning, and accommodates new sample data in a continuous fashion. the human-like information capture paradigm of granular computing is used along with an interval type-2 neural-fuzzy system to develop a modelling structure that is tolerant to the uncertainty in the manufacturing data (common challenge in industrial/manufacturing data). the proposed method relies on the creation of new fuzzy rules which are updated and optimised during the incremental learning process. An iterative pruning strategy in the model is then employed to remove any redundant rules, as a result of the incremental learning process. the rule growing/pruning strategy is used to guarantee that the proposed structure can be used in a perpetual learning mode. It is demonstrated that the proposed structure can effectively learn complex dynamics of input-output data in an adaptive way and maintain good predictive performance in the metal processing case study of steel FSW using real manufacturing data. (C) 2016, ifac (International Federation control) Hosting By Elsevier Ltd. All rights reserverd.

关键词： perpetual learning incremental learning fuzzy neural networks granular computing type-2 fuzzy systems friction stir welding metal processing

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Dynamic reallocation and rescheduling of steel products using agents with strategical anticipation and virtual marketstructures

Dynamic reallocation and rescheduling of steel products usin...

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Neuer, Marcus J. Marchiori, Francesca Ebel, Alexander Matskanis, Nikolaos Piedimonti, Luca Wolff, Andreas Mathis, Gael VDEH Betriebsforschungsinst BFI Sohnstr 65 D-40237 Dusseldorf Germany Ctr Sviluppo Mat Castel Romano RM Italy CETIC Charleroi Belgium

A multi-agent system for the steel production is presented. It re-allocates off-spec products to existing alternative orders. the system consists of three main Industry 4.0 components: agents, service-oriented architecture (SOA) and a semantic modelling of the process chain. Using economic principles like virtual marketplaces, the solution of the reallocation is reached by means of auctions, where product agents act as sellers and order agents act as bidders. A virtual price defines the key for the matching process between order and product. To incorporate postprocessing, product agents anticipate their possibly reachable future states with first-principle models. the matching between order and product characteristics is then based on the predicted product future and the order specification. As the post-processing comes at a cost, logistics costs, administrative costs and transformation costs are also considered for constructing the virtual price. the presented system runs as online open-loop prototype at a steel plant of ArcelorMittal and shows promising results for the reallocation task. (C) 2016, ifac (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： multi-agent systems factory wide control steel industry service oriented architecture

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Dynamic Model for estimating the Macroscopic Fundamental Diagram

Dynamic Model for estimating the Macroscopic Fundamental Dia...

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14th ifac symposium on control in Transportation systems (CTS)

作者： Hoai-Nam Nguyen Fishbain, Barak Bitar, Eilyan Mahalel, David Gutman, Per-Olof IFP Energies Nouvelles Rond Point Echangeur Solaize BP 3 F-69360 Solaize France Technion Israel Inst Technol Fac Civil & Environm Engn IL-32000 Haifa Israel Cornell Univ Dept Elect & Comp Engn Ithaca NY USA Technion Israel Inst Technol Fac Civil & Environm Engn IL-32000 Haifa Israel

the Macroscopic Fundamental Diagram (MFD) relates the number of circulating vehicles (or accumulation) to a neighbourhoods average speed or flow. In theory the MFD has a well-defined maximum which remains invariant over time. Recent studies, however, suggest that in practice this is not the case, and the MFD does present a variations over time. these variations in the MFD render traffic simulations, modelling and control schemes inaccurate, as these tools do not capture the dynamic nature of the MFD. this paper presents a dynamic model for estimating the MFD, so it does capture the MFDs time varying nature. A mathematical Kalman-filter based framework for solving the model and estimating the MFD are also presented. the application of the method on a small scale example shows the potential of the method. (C) 2016, ifac (International Federation of Antomatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Macroscopic Fundamental Diagram (MFD) Traffic Network State Dynamic Estimation Traffic control Kalman-Filter

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Predictive Expert control System of a Hybrid Pilot Rougher Flotation Circuit

Predictive Expert Control System of a Hybrid Pilot Rougher F...

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Bergh, Luis Yianatos, Juan Olivares, Juan Duran, Juan Santa Maria Univ CASIM Automat & Supervis Ctr Mineral Ind Chem Engn Dept Valparaiso Chile

In the last decades heuristic approaches based on logic rules have been one favored tool to control flotation units and plants on top of distributed control systems. the lack of fundamental knowledge on flotation processes, expressed in reliable models, and programs to assure the quality of the information, contained in available measurements, have limited the developing of robust predictive control strategies. In this paper we explore the idea of using simplified models jointly with measured disturbances to modify the set points of froth depth and air flow rate controllers. Since these target predictions are only approximate, a conventional feedback expert system, based on logic rules, continues the task of calculating new set points of the distributed controllers, in order to decrease the gap between actual and desirable metallurgical targets. this combined actions permitted a fast response of the process to change the operation of the circuit when a measured disturbance change is detected. this control system was implemented and experimentally evaluated in a pilot rougher flotation circuit, with three pneumatic cells, with froth depth and air flow rate controllers in each cell. Since the circuit is operated for the air-water system, a phenomenological model, with parameters estimated from industrial data, is fed on-line with real operating variables and Virtual values, characterizing the feed (grades, solids%, particle size distribution), in order to predict the metallurgical targets (recovery and concentrate grade). Several cases are discussed showing the benefits of this control system and the possible improvements to work on. Copyright (C) 2016 ifac (C) 2016, ifac (International Federation control) Hosting By Elsevier Ltd. All rights reserverd.

关键词： control flotation expert systems fuzzy logic supervision

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modelling and Compensation of thermally Induced Positioning Errors in a High Precision Positioning Application

Modelling and Compensation of Thermally Induced Positioning ...

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7th ifac symposium on Mechatronic systems (MECHATRONICS)

作者： Zuest, Simon Paul, Philip Weiss, Lukas Wegener, Konrad Swiss Fed Inst Technol Inst Machine Tools & Mfg IWF Zurich Switzerland Swiss Litho AG Technoparkstr 1 Zurich Switzerland Inspire AG Technoparkstr 1 Zurich Switzerland

thermal scanning probe lithography (t-SPL) is a promising technology to create patterns at the nanometre scale. So far, a commercially available t-SPL tool only exists for small, centimetre scale work pieces typically used in the university research environment. Scaling this technology to work with industry standard wafers requires much larger mechanical positioning units. these are subject to thermally induced deformations and consequently positioning errors. this work suggests a model based compensation of a mechanical positioning unit in combination with a direct position measurement enabled by the t-SPL patterning tool. Based on a linear model of the positioning unit, a Kalman based filter is designed, to estimate thermal errors during the patterning process and use position measurements between patterning phases for re-calibration. the presented filter does not require additional measurement equipment for the compensation. An application of the presented algorithm on an experimental set-up shows a significant reduction of thermally induced position errors. (C) 2016, ifac (International Federation of Automatic control) Hosting Elsevier Ltd. All rights reseirved.

关键词： State-space model Position estimation Position error Kalman filter Active compensation

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Optimal Regulation for Dynamic Hybrid systems Based on Dynamic Programming in the Case of an Intelligent Vehicle Drive Assistant

Optimal Regulation for Dynamic Hybrid Systems Based on Dynam...

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9th ifac symposium on Intelligent Autonomous Vehicles (IAV)

作者： Schmidt, Simon Mercorelli, Paolo Leuphana Univ Lueneburg Inst Prod & Proc Innovat Volgershall 1 D-21339 Luneburg Germany

this contribution proposes an application of an optimisation algorithm to be implemented in an intelligent drive assistant. A vehicle dynamic model is introduced and after the characterisation of its considered nonlinearities some elements of the background concerning "Dynamic Programming' are given together with the proposed algorithm. A two-point boundary value optimization problem in term of velocity is proposed with its solution using the well-known "Dynamic Programming" method. the novelties of this approach consists of a technique which leads to a global optimum. In fact, this technique searches throughout the whole state-space for it. Because of the nonlinearity of the considered problem, using numerical methods seems to be the only way solving it. Using "Dynamic programming" such kind of a complex problem is solved by dividing it into a collection of simpler subproblems. At the end, an optimal feedback controller for the angular position of the throttle valve of the engine is proposed. Simulation results are discussed together with possible application aspects such as "Curse of Dimensionality" and an explicit analysis concerning the calculation effort. (C) 2016, ifac (International Federation of Automatic control) Hosting, by Elsevier Ltd. All rights reserved.

关键词： Optimal control Autonomous vehicles Hybrid models modelling

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Optimal Steady-State Temperature Field in an Experimental Annealing Furnace

Optimal Steady-State Temperature Field in an Experimental An...

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Jadachowski, L. Steinboeck, A. Kugi, A. Vienna Univ Technol Automat & Control Inst Christian Doppler Lab Model Based Control Steel I Gusshausstr 27-29 A-1040 Vienna Austria Vienna Univ Technol Automat & Control Inst Gusshausstr 27-29 A-1040 Vienna Austria

the computation of an optimal steady-state operating point in an experimental annealing furnace is considered. In particular, the optimum spatial distribution of electric power supplied to IR-lamps is computed to ensure the temperature uniformity in the specimen fillet. A control-oriented reduced-order model of the steady-state 2D temperature distribution is derived and compared with the full-order model. Saturation functions are used to consider input constraints in a tailored optimization problem. the evaluation of the optimal control input is carried out with the full-order model. Uniqueness of the solution of the optimization problem is investigated numerically. the temperature field in the specimen fillet deviates less than 0.4% of the setpoint value if sufficient heating power is available. (C) 2016, ifac (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Optimal operating point Distributed-parameter systems Elliptic quasilinear PDE Model reduction FE method Non-equidistant grid

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Real-Time Simulation and control of a SAG Mill

Real-Time Simulation and Control of a SAG Mill

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Guerrero, F. Bouchard, J. Poulin, E. Sbarbaro, D. Univ Concepcion Dept Elect Engn Concepcion Chile Univ Laval Dept Min Met & Mat Engn Quebec City PQ Canada Univ Laval Dept Elect & Comp Engn Quebec City PQ Canada

Real-time simulation plays an important role not only in the design and commissioning of new control strategies, but also in training the operators before the actual system is installed. there are in the market several simulation environments for carrying out these tasks. However, there is still a need of having more flexible environments that can be easily integrated with other systems and tools such as real-time optimization and advanced data analysis. In this work, several standard tools such as Simulink (R) Simulink (R) OPC toolbox, RSLogix 5000, and FactoryTalk (R) are integrated to simulate a control strategy for a SAG mill designed to keep the mill operating in the stable region by manipulating the fresh ore feed. the implementation of this strategy is based on standard control blocks available in the controlLogix Programmable Logic controllers (PLCs). Experimental results show the effectiveness of the proposed approach to integrate standard tools, and open new possibilities for further developments in the design of advanced monitoring and control strategies for industrial processes. (C) 2016, ifac (International Federation of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Simulink

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Curvature control in radial-axial ring rolling

Curvature control in radial-axial ring rolling

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17th ifac symposium on control, Optimization and Automation in Mining, Mineral and Metal Processing (MMM)

作者： Arthington, Matthew R. Cleaver, Christopher J. Huang, Jianglin Duncan, Stephen R. Dept Engn Sci 17 Parks Rd Oxford OX1 3JP England Dept Engn Cambridge CB2 1PZ England

Radial-axial ring rolling (HARR) is an industrial process that produces seamless metal rings with uniform cross-section using one radial and one axial rolling stage. Conventionally, the ring products are circular and the process is tightly constrained using guide rolls for stability, and to ensure the circularity and uniformity of the ring. Recent work has shown that, when guide rolls are omitted, stability can be maintained using differential speed control of the roll pairs. However, achieving uniform curvature in this unconstrained configuration was not always possible When the controller only centred the ring wit I In I. the rolling [Rill. In addition to the regulation of constant curvature in circular rings, differential speed control in unconstrained rolling;offers an opportunity to bend the ring about the mandrel to create shapes wall. 11011 uniform curvature, for example: squares, hexagons, rings with flat sections, etc. We describe a control technique for creating non-circular rings using the rolling hardware of a conventional RARR mill, machine-vision sensing and differential speed control of the rolling stages. the technique has been validated for an industrial material in numerical simulations using the finite element, method and also demonstrated on a desktop-scale RARR mill using modelling clay to simulate metal at elevated process temperatures. (C) 2016,ifac (lnternational anon of Automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Process automation process control sensor systems image processing industrial control forging rolling

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