检索结果-内蒙古大学图书馆

International Conference on Emerging Technologies and Factory automation (ETFA)

作者： J. Muller U. Epple M. Wollschlaeger C. Diedrich Department of Process Control Engineering RWTH Aachen Aachen Germany Ifak-Institut für Automation und Kommunikation e.V. Magdeburg Barleben Germany

In already installed fieldbus instrumentations, a configuration-free and manufacturer-independent access to field device information sets is still missing. Due to the lack of suitable and simple models, as well as of interaction patterns of field devices in various information worlds of process control engineering, the practical use made of device novelties is rather complex. This affects high investments for engineering this information in various applications of process control engineering. Modern field devices contain embedded information sets that are ever-increasing, and provide great opportunity for innovative asset management functionality. In this paper we present an information server, serving as an additional information channel between field and plant level in process industry. We show that this so-called asset management box provides the configuration-free analysis of fieldbus segments, the open access to installed field devices and the automatically updated, structured and self-descriptive presentation of their embedded information sets. Its basic functionality fulfills one prerequisite of an efficient asset management system: the analysis of the actual state of a fieldbus installation, without prior knowledge about the installed field devices and enhanced investments in engineering. We discuss several asset management applications, implemented on the asset management box. To prevent excessive investments for engineering of asset management applications themselves, widest flexibility and extensibility of the management systems' functionality is required. The box's structure permits easy extensibility of plant and client-specific applications as well as the easy integration of specific fieldbus hardware, the box provides a universal fieldbus interface.

关键词： Asset management Field buses Investments process control Instruments Manufacturing Electrical equipment industry Information analysis Knowledge engineering engineering management

来源：评论

学校读者我要写书评

暂无评论

Optimal Choice of Horizons for Predictive control by Using Genetic Algorithms

引用

IFAC Proceedings Volumes 2003年第18期36卷 507-512页

作者： R. Haber U. Schmitz R. Bars Department of Plant and Process Engineering Laboratory of Process Control University of Applied Science Cologne D-50679 Köln Betzdorfer Str. 2 Germany fax: +49-221-8275-2836 Department of Automation and Applied Informatics Budapest University of Technology and Economics H-1111 Budapest Goldmann Gy. tér 3. Hungary fax : +36-1-463-2871

For predictive control in industry often very long horizons for control error and manipulated signal are used because of the slow processes which take place in the petrochemical industry. In order to reduce the computational effort some commercial predictive control program packages offer the ability to reduce the number of points in both horizons but do not recommend how to select the points which have to be considered in the horizon of the control error and manipulated variable. In this work the authors introduce an optimal choice not only of the horizon lengths itself but also for the strategy of reducing the number of points in the horizons. A genetic optimization algorithm was used both for the search for the optimal length of the horizons and for the best allocation of the points in the horizons. The results of the optimization process where used to deduct a simple rule.

关键词： Predictive control long horizons blocking coincidence points compaction points optimal choice of horizons

来源：评论

学校读者我要写书评

暂无评论

Nonlinear process Identification and Predictive control by the Weighted Sum of Multi-Model Outputs

引用

IFAC Proceedings Volumes 2003年第18期36卷 129-134页

作者： U. Schmitz R. Haber R. Bars Department of Plant and Process Engineering Laboratory of Process Control University of Applied Science Cologne D-50679 Köln Betzdorfer Str. 2 Germany fax: +49-221-8275-2836 Department of Automation and Applied Informatics Budapest University of Technology and Economics H-1111 Budapest Goldmann Gy. tér 3. Hungary fax : +36-1-463-287l

Most industrial processes are nonlinear. In such a case only a nonlinear model valid for the whole working area can ensure a good controller design. The nonlinear process is approximated by a multi-model consisting of the intelligent combination of some linear sub-models. As a very practical way the following identification strategy was used: independent model parameter estimation in the different working points and the calculation of the global valid model output as the weighted sum of the sub-models. As a weighting function the Gaussian function is used. The parameters of the Gaussian function were chosen either without or with optimization of the identification cost function. The global valid nonlinear model was used for model based predictive control. A heat exchanger example illustrates the method.

关键词： process identification nonlinear models predictive control multi-model heat exchanger

来源：评论

学校读者我要写书评

暂无评论

Hybrid IMC Dead-Beat controller Design in Delta Domain

引用

IFAC Proceedings Volumes 2003年第18期36卷 381-386页

作者： Zs. Preitl R. Bars I. Vajk R. Haber Department of Automation and Applied Informatics Budapest University of Technology and Economics. MTA-BME Control Research Group H-1111 Budapest Goldmann Gy. tér 3. Hungary: fax : + 36-1-463-2871 Department of Plant and Process Engineering University of Applied Science Cologne Germany

The paper presents a control system design technique in delta domain for IMC (Internal Model control) structure. Also a generalised form for delta domain Dead-beat control algorithm is given, a hybrid implementation of the controller (Z-domain combined with delta domain) is presented and its architecture is compared with the pure deltadomain implementation. The effect of placing the limitations in the IMC structure is also studied. The hybrid control structure is compared with a similar Dead-beat controller in Z-domain for second and third order plants (benchmarks). An illustrative sensitivity analysis between the hybrid control system and the Z-domain system has been performed.

关键词： controller design delta domain generalised hybrid Dead-beat controller sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

On the application of multimedia in control and automation

On the application of multimedia in control and automation

引用

4th IEEE International Caracas Conference on Devices, Circuits and Systems, ICCDCS 2002

作者： Moller, R. Automation and Process Control Engineering University of Wuppertal Dept. of Electrical Engineering Germany

ISBN: (纸本)0780373804

The degree of machine automation is continuously increasing, because computer technology, control software, telecommunication technology and visualization systems are also continuously improved. This makes the use of new multimedia techniques for reading, communication and presentation of machine or process data possible, even over far distances. Multimedia communication is becoming a technology of growing importance for user interfaces in automation and process control. Think of acoustic and visual data obtained from microphones or cameras applied to a certain automated system. They can be simply used and understood as a new brand of sensors or actuators that are part of a process control unit. Supervising and monitoring of certain process states is simplified, if the operator can "see" and "hear" the real process. Technical aspects concerning types, quality and speed of multimedia data communication will be discussed and especially viewed for an implementation in automated systems. © 2002 IEEE.

关键词： automation

来源：评论

学校读者我要写书评

暂无评论

Synthesis of plantwide quality prediction system for a sintering plant 15th

Synthesis of plantwide quality prediction system for a sinte...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Langer, Michael Vogel, Birgit University Wuppertal Automation and Process Control Engineering Fuhlrottstraße 10 Wuppertal42119 Germany

ISBN: (纸本)9783902661746

To substantially improve operational control of complex industrial plants, it is important to be able to predict the influences which process variables have on quality-relevant target variables. The determination of influencing relationship and also the delay-time behaviour of various industrial processes makes it difficult to synthesis a quality prediction system. A hybrid modeling method combined with a suitable classification of process characteristics ensures a widespread model synthesis for quality prediction. Copyright © 2002 IFAC.

关键词： process control

来源：评论

学校读者我要写书评

暂无评论

Data fusion for precise dead-reckoning of passenger cars 15th

Data fusion for precise dead-reckoning of passenger cars

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Kochem, M. Wagner, N. Hamann, C.-D. Isermann, R. University of Technology Darmstadt Institute of Automatic Control Laboratory for Control Engineering and Process Automation Germany Adam Opel AG Rüsselsheim Germany

ISBN: (纸本)9783902661746

This paper investigates the possibility of computing the actual position of a passenger car based on different independent internal signals available in a production car. A new front wheel based dead reckoning approach is compared to a model based approach as well as to an Extended Kalman Filter. Depending on the method the input signals are the wheel revolutions of the front wheels, the steering angle and the yaw rate. Experimental results show the quality of all three algorithms compared to position data obtained by a DGPS system and also to the well known rear wheel based dead reckoning approach. Copyright © 2002 IFAC.

关键词： Sensor data fusion

来源：评论

学校读者我要写书评

暂无评论

Semi-physical modelling of nonlinear processes by means of local model approaches 15th

Semi-physical modelling of nonlinear processes by means of l...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Töpfer, Susanne Wolfram, Armin Isermann, Rolf Darmstadt University of Technology Institute of Automatic Control Laboratory for Control Engineering and Process Automation Landgraf-Georg-Strasse 4 DarmstadtD-64283 Germany

ISBN: (纸本)9783902661746

For many practical applications, a combination of theoretical and experimental modelling appears feasible. Qualitative knowledge about the most significant effects are often known or easily accessible. This contribution suggests a semi-physical modelling approach based on the special architecture of local models. Due to their inherent transparency, these models are very well suited for the incorporation of mainly qualitative process knowledge. The integration of prior knowledge is realised by an adaptation of the model structure to that one of the process. As a result, the final process-specific models are characterised by high generalisation performance also in situations with only few measurement data. Copyright © 2002 IFAC.

关键词： Fuzzy neural networks

来源：评论

学校读者我要写书评

暂无评论

A model based supervision system for the hydraulics of passenger car braking systems 15th

A model based supervision system for the hydraulics of passe...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Straky, Harald Münchhof, Marco Isermann, Rolf Institute of Automatic Control Laboratory of Control Engineering and Process Automation Darmstadt University of Technology Landgraf-Georg-Str. 4 DarmstadtD-64283 Germany

ISBN: (纸本)9783902661746

This paper presents the design of a model-based supervision and diagnosis system for hydraulic and future electro-hydraulic passenger car braking systems. A state space model of the braking system has been derived, which allows calculation of the individual wheel brake cylinder pressures as well as the amount of brake fluid consumed due to faults in the braking system. Based on this model, a real-time supervision system has been developed, which allows early detection and diagnosis of leakages and air entrapments in the hydraulic subsystem. This supervision system only requires data of sensors which are already available in modern passenger cars. Copyright © 2002 IFAC.

关键词： Fault detection

来源：评论

学校读者我要写书评

暂无评论

SYNTHESIS OF PLANTWIDE QUALITY PREDICTION SYSTEM FOR A SINTERING PLANT

引用

IFAC Proceedings Volumes 2002年第1期35卷 71-76页

作者： Michael Langer Birgit Vogel University Wuppertal automation and process control engineering Fuhlrottstraße 10 42119 Wuppertal Germany

关键词： process control Neuro-Fuzzy modeling design simulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：