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International Carpathian control Conference (ICCC)

作者： Carmen Ho Zi-qiang Lang Stephen A. Billings Bogdan Sapinski Department of Automatic Control Systems Engineering University of Sheffield Sheffield UK Department of Process Control AGH University of Science and Technology Cracow Poland

ISBN: (纸本)9781467344883

The main problem of using a conventional linear damper on a vibration isolation system is that the reduction of the resonant peak inevitably results in the degradation of the high-frequency transmissibility. Instead of using semi-active or active control methods which normally depend on the quality of measured signals and may have stability concerns, recent studies have revealed that optimal vibration isolation over a wide frequency range can be achieved by using nonlinear damping. The present study is concerned with the realisation of the ideal nonlinear damping characteristic using a feedback controlled MR damper. Simulation studies are conducted to demonstrate the advantages of a simple but effective control strategy. This research work has signilicant implications for the design of MR dampers and the design of vibration control in a range of engineering applications.

关键词： Shock absorbers Damping Abstracts Adaptive control Current measurement

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On the way to autonomous model predictive control: A distillation column simulation study

On the way to autonomous model predictive control: A distill...

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10th IFAC Symposium on Dynamics and control of process systems, DYCOPS 2013

作者： Annergren, M. Kauven, D. Larsson, C.A. Potters, M.G. Tran, Q. Özkan, L. Automatic Control Lab. and ACCESS School of Electrical Engineering KTH SE-100 44 Stockholm Sweden RWTH Aachen University AVT - Process Systems Engineering Turmstr. 46 52064 Aachen Germany Delft Center for Systems and Control Delft University of Technology Mekelweg 2 2628 CD Delft Netherlands Department of Electrical Engineering Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven Netherlands

ISBN: (纸本)9783902823595

Model Predictive control (MPC) is a powerful tool in the control of large scale chemical processes and has become the standard method for constrained multivariable control problems. Hence, the number of MPC applications is increasing steadily and it is being used in application domains other than petrochemical industries. A common observation by the industrial practitioners is that success of any MPC application requires not only efficient initial deployment but also maintenance of initial effectiveness. To this end, we propose a novel high level automated support strategy for MPC systems. Such a strategy consists of components such as performance monitoring, performance diagnosis, least costly closed loop experiment design, re-identification and autotuning. This work presents the novel technological developments in each component and demonstrates them on a distillation column case study. We show that automated support strategy restores nominal performance after a performance drop is detected and takes the right course of action depending on its cause. © IFAC.

关键词： Model predictive control

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control Lyapunov function based feedback design for quasi-polynomial systems

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IFAC Proceedings Volumes 2013年第23期46卷 128-133页

作者： Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

The aim of this work is to present an entropy-like Lyapunov function based dynamic feedback design technique for quasi-polynomial and Lotka-Volterra systems. It is shown, that the dynamic feedback design problem is equivalent to the feasibility of a bilinear matrix inequality. The problem is also formulated as a control Lyapunov function based feedback design when the Lyapunov function parameters are given, the solution of this problem can be obtained by solving a linear matrix inequality. The developed method is illustrated on a simple numerical example.

关键词： Lyapunov stability nonlinear systems stabilizing feedback dynamic feedback optimization problems

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Tools to manage the decision-making process in operating rooms

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BMC Health Services Research 2014年第2期14卷 1-1页

作者： Liliana Neriz Daniela Silva Alicia Núñez Francisco Ramis Department of Management Control and Information Systems School of Economics and Business Universidad de Chile Santiago Chile Department of Industrial Engineering Center of Advanced Studies in Process Simulation Universidad del Bío-Bío Concepción Chile

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ComVantage: Mobile enterprise collaboration reference framework and enablers for future internet information interoperability

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2013 Annual Future Internet Assembly, FIA 2013

作者： Salmen, Angelika Munch, Tobias Buzin, Steffen Hladik, Jan Altmann, Werner Weber, Conny Karagiannis, Dimitris Buchmann, Robert Ziegler, Jens Pfeffer, Johannes Graube, Markus Carnerero, Manuel Loṕez, Oscar Uriarte, Mikel Oŕtiz, Patricia Laźaro, Oscar SAP Research SAP AG Germany Kölsch and Altmann Software Management and Consulting GmbH Germany ISN - Innovation Service Network GmbH Austria University of Wien Austria Technische Universitt Dresden Department of Process Control Systems Engineering Germany NEXTEL S.A Spain Innovalia Association Spain

ISBN: (纸本)9783642380815

Future Internet Networked Enterprise systems demand enhanced collaboration and mobility support. FI technologies are fundamental for increased service differentiation and cost optimisation in manufacturing environments. However, such ICT-based capabilities are not easy to introduce, in particular to SMEs, due to high costs and complexity. To progress in more effective development of value added services based on Web 2.0 principles within a mobile enterprise collaboration context, the complexity of collaboration in terms of information management needs to be leveraged from the end-users. Linked Data (LD) provides a universal and lightweight approach for the collaboration network. However, the elaboration of collaborative business processes based on LD still needs to be properly formulated for FI systems. The aim of this paper is to present a reference architecture for mobile enterprise collaboration based on LD interoperability. Moreover, security, semantic data lifting, business process modelling interoperability and mobile app orchestration enablers are presented to facilitate trustful and effective inter-organisational collaboration. © The Author(s).

关键词： Interoperability

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A moving horizon approach to multivariable input design in general linear systems with constraints

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IFAC Proceedings Volumes 2013年第32期46卷 577-582页

作者： R.S. Patwardhan R.B. Gopaluni Process and Control Systems Department Saudi Aramco Dhahran Saudi Arabia 31311 Department of Chemical and Biological Engineering University of British Columbia Vancouver BC Canada V6T 1Z4

The quality of a model determines the closed loop performance of model predictive controllers. However, identification of high quality multivariable models is a time and energy intensive exercise. The industrial model predictive controllers are designed using large dimensional multivariable models and they are often identified using ad-hoc single input bump tests. A novel multivariable input design approach is developed using a modified model predictive control objective function. It is shown that the proposed input design approach is trace optimal with respect to the covariance of model parameters. The approach is shown to work well in closed loop on both well and ill-conditioned processes even under model-plant mismatch while meeting input and output constraints.

关键词： Input design closed loop systems model predictive control

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Fuzzy Logic based control of the single phase induction motor without start-capacitor

Fuzzy Logic based control of the single phase induction moto...

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International Conference on Power engineering, Energy and Electrical Drives, POWERENG

作者： Kenza Bouhoune Krim Yazid Mohamed Seghir Boucherit Power and Industrial Systems Laboratory Faculty of Electronics and Informatics University of the Sciences and Technology Algiers Algeria Process Control Laboratory Department of Electrical Engineering Polytechnic National School Algiers Algeria

This paper investigates the performance of a single-phase induction motor (SPIM) drive operated as two-phase motor (TPIM) and controlled basing on fuzzy logic (FL). Because of coupling behavior between fluxes in motor, it is still necessary to advance in controller tuning. The applied control strategy proposed in this paper is the vector control based on fuzzy controllers. The application of this control strategy to the single-phase motor operating as two-phase motor increases its dynamic performance and constitutes a contribution to the study of this machine. Indeed, this type of machine has not yet taken its whole share from various works present until now, compared to the three-phase induction machine. The performances of the proposed control; applied to the single-phase induction motor supplied by voltage source inverter; are investigated by simulations under different operating conditions. The obtained results; compared to the traditional control method based on conventional controllers (CC); show the effectiveness and stronger robustness of the control system.

关键词： Induction motors Windings Torque Fuzzy logic Rotors

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On The Way To Autonomous Model Predictive control: A distillation column simulation study 1

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IFAC Proceedings Volumes 2013年第32期46卷 713-720页

作者： M. Annergren D. Kauven C.A. Larsson M.G. Potters Q. Tran L. Ozkan Automatic Control Lab and ACCESS School of Electrical Engineering KTH SE-100 44 Stockholm Sweden RWTH Aachen University AVT - Process Systems Engineering Turmstr. 46 52064 Aachen Germany Delft Center for Systems and Control Delft University of Technology Mekelweg 2 2628 CD Delft The Netherlands Department of Electrical Engineering Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands

Model Predictive control (MPC) is a powerful tool in the control of large scale chemical processes and has become the standard method for constrained multivariable control problems. Hence, the number of MPC applications is increasing steadily and it is being used in application domains other than petrochemical industries. A common observation by the industrial practitioners is that success of any MPC application requires not only encient initial deployment but also maintenance of initial effectiveness. To this end, we propose a novel high level automated support strategy for MPC systems. Such a strategy consists of components such as performance monitoring, performance diagnosis, least costly closed loop experiment design, re-identification and autotuning. This work presents the novel technological developments in each component and demonstrates them on a distillation column case study. We show that automated support strategy restores nominal performance after a performance drop is detected and takes the right course of action depending on its cause.

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Autonomous dynamic hand gesture recognition in industrial settings

Autonomous dynamic hand gesture recognition in industrial se...

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IADIS International Conference ICT, Society and Human Beings 2012, IADIS International Conference e-Commerce 2012, Part of the IADIS Multi Conference on Computer Science and Information systems 2012, MCCSIS 2012

作者： Ziegler, Jens Döring, Randy Pfeffer, Johannes Urbas, Leon Department of Process Control Systems Engineering Institute of Automation Dresden University of Technology Dresden Germany

ISBN: (纸本)9789728939755

In this paper we present a robust and reliable system for interaction with mobile devices using dynamic hand gestures. While other approaches rely on remote computation our system is wearable, lightweight and unobtrusive. It is usable in industrial settings where touch-based interaction is inconvenient and resource efficiency is important. The recognition algorithm is based on Hidden-Markov-Models and optimized for fixed-point arithmetic available in low-cost embedded controllers. The system is highly reliable providing recognition rates significantly higher than the design target of 90 % for an alphabet of 10 gestures. The evaluation of the resulting solution has yielded an effectiveness of 97 % and mean execution times of less than one second. These performance figures are sufficient to consider the presented system an effective and energy efficient alternative to systems that depend on remote computation. It provides autonomous and reliable interaction for single-handed operation of mobile devices in rough industrial settings. © 2012 IADIS.

关键词： Hidden Markov models

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Realizability of n-port resistive networks with 2n terminals

Realizability of n-port resistive networks with 2n terminals

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Asian control Conference

作者： Michael Z. Q. Chen Chanying Li Kai Wang Zhiqiang Zuo Minghui Yin Guanrong Chen Department of Mechanical Engineering University of Hong Kong Hong Kong China School of Automation Nanjing University of Science and Technology Nanjing China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China Department of Electronic Engineering City University of Hong Kong Hong Kong China

In this paper, we consider the realizability problem of n-port resistive networks containing 2n terminals. A necessary and sufficient condition for any real symmetric matrix to be realizable as the admittance of an n-port resistive network containing 2n terminals is obtained. The condition is based on the existence of a parameter matrix. We then focus on a three-port resistive network containing six terminals. A necessary and sufficient condition is derived for any real symmetric matrix to be realizable as the admittance of a three-port resistive network containing six terminals and at most five positive elements, whose topological structure is properly restricted.

关键词： Symmetric matrices Ports (Computers) Admittance Educational institutions Resistors Joining processes Passive networks

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