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ℋ∞Filter Design with Minimum Entropy for Continuous-Time Linear Systems

Mathematical Problems in engineering 2013年第1期2013卷

作者： Jie Zhang Hamid Reza Karimi Zhong Zheng Ming Lyu Yuming Bo School of Automation Nanjing University of Science and Technology Nanjing 210094 *** Department of Engineering Faculty of Engineering and Science University of Agder 4898 Grimstad Norwayuia.no Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 *** Information Overall Department North Information Control Group Co. Ltd. Nanjing 211153 China

We deal with the design problem of minimum entropy ℋ ∞ filter in terms of linear matrix inequality (LMI) approach for linear continuous-time systems with a state-space model subject to parameter uncertainty that belongs to a given convex bounded polyhedral domain. Given a stable uncertain linear system, our attention is focused on the design of full-order and reduced-order robust minimum entropy ℋ ∞ filters, which guarantee the filtering error system to be asymptotically stable and are required to minimize the filtering error system entropy (at s 0 = ∞ ) and to satisfy a prescribed ℋ ∞ disturbance attenuation performance. Sufficient conditions for the existence of desired full-order and reduced-order filters are established in terms of LMIs, respectively, and the corresponding filter synthesis is cast into a convex optimization problem which can be efficiently handled by using standard numerical software. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method.

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Exploring possibilities of predictive self-programming thermostats for energy savings

Exploring possibilities of predictive self-programming therm...

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ELEKTRO

作者： Tomas Miklušcak Andrej Kapjor Aleš Janota Ondrej Biroš Department of Control and Information Systems Faculty of Electrical Engineering ž½ilina Slovakia Faculty of Mechanical Engineering Department of Control and Information Systems University of Žilina Zilina Slovakia Faculty of Electrical Engineering Department of Control and Information Systems University of Žilina Zilina Slovakia Faculty of Mechanical Engineering Department of Automation Control and Human Machine Interaction Technical University of Košice Kosice Slovakia Department of Automation Control and Human Machine Interaction Košice Slovakia

In this paper we present predictive self-programming thermostat which controls the heating of a smart environment based on occupancy prediction. We present results of 290 days-long simulation as well as limits of simi... 详细信息

关键词： Thermostats Heating Buildings Schedules Sensors Temperature distribution

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Development of fuzzy logic water bath temperature controller using MATLAB

Development of fuzzy logic water bath temperature controller...

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2012 IEEE International Conference on control System, Computing and engineering, ICCSCE 2012

作者： Hasim, Norhaslinda Aras, Mohd Shahrieel Mohd Rashid, Mohd Zamzuri Ab Kassim, Anuar Mohamed Abdullah, Shahrum Shah Department of Control and Automation Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia Department of Mechatronics Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia Department of Electric and Electronics Malaysia-Japan International Institute of Technology Universiti Teknologi Malaysia 54100 Kuala Lumpur Malaysia

ISBN: (纸本)9781467331432

In this paper, the development of a water bath temperature system to control the liquid's temperature in the water bath will be presented. In order to develop the water bath temperature control system, MATLAB fuzzy logic toolbox will be utilized. The Fuzzy Logic controller (FLC) is designed to control water temperature based on the input acquired from the thermal transducer sensor. The inference engines that are used are;Max-min (Mamdani) method and centre of gravity technique for defuzzification. The 4 × 4 matrix rules for the controller will be used in this project. In addition, the USB NI-DAQ card will be used as xPC target to link the MATLAB software and real time application. The real time output temperature is validated based on the simulation's temperature which is initially set by user. It can be concluded the performance of real time study is in par with the simulation result. © 2012 IEEE.

关键词： MATLAB

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Fault tolerant direct torque control of three-phase permanent magnet synchronous motors

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WSEAS Transactions on Systems 2012年第8期11卷 465-476页

作者： Teng, Qingfang Zhu, Jianguo Wang, Tianshi Lei, Gang Department of Automation and Electrical Engineering Lanzhou Jiaotong University Lanzhou Gansu 730070 China Faculty of Engineering and Information Technology University of Technology Sydney Sydney NSW 2007 Australia

The model of three-phase permanent magnet synchronous motor (PMSM) with loss of one phase or loss of one transistor is built and its fault tolerant direct torque control (DTC) is investigated. Extra-leg extraswitch inverter is put to use in the post-fault operation. Two different flux estimators are employed in order to calculate stator flux linkage & their corresponding torque and switching table is kept the same as the case of DTC for the healthy motor. The parameters of PI controller and hysteresis controller are determined by differential evolution algorithm. Dynamic responses of both healthy and unhealthy PMSM DTC system adopting aforementioned two flux estimators are given to compare their performance via simulation and some discussion is presented. The simulation results show the proposed fault tolerant DTC yields satisfactory torque and speed control no matter which one of two flux estimators provided in the paper is employed.

关键词： Torque control

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Gradient Method Optimization of Penicillin Production

Gradient Method Optimization of Penicillin Production

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第24届中国控制与决策会议

作者： Matej Polka Sergej elikovsky Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in PragueCzech Republic Institute of Information Theory and Automation Prague Czech Republic

A fermentation process is generally defined as a biological process containing the growth of the biomass (bacteria, yeasts) resulting from the consumption of essential substrate supplies (source of carbon, nitrogen, oxygen, etc.). The biomass growth is usually followed by the production of various products from which especially the variety of antibiotics makes the fermentation processes attractive for the industrial utilization. However, the complicated dynamics, high level of uncertainty and nonlinearity and difficult online measurement of the process variables come hand in hand with the attractivity and turn the attempts on optimal control of the fermentation process into a very delicate challenge. To tackle it, the theory of the gradient projection method has been partially adapted and fully implemented by the authors of this paper. Numerical experiments show its significantly better performance than for other known methods. Moreover, these experiments reveal an interesting "superprofile" visible for long cultivation times.

关键词： Fermentation process, penicillin, gradient method, optimization

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Gradient method optimization of penicillin production

Gradient method optimization of penicillin production

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Chinese control and Decision Conference, CCDC

作者： Matej Pčolka Sergej Čelikovský Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Prague Czech Republic Institute of Information Theory and Automation AS CR Prague Czech Republic

关键词： Substrates Gradient methods Mathematical model Biomass Production Biological system modeling

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Designing and tuning a brake assistant for omnidirectional wheels

Periodica Polytechnica Electrical Engineering and Computer S...

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Periodica Polytechnica electrical engineering and Computer Science 2012年第4期56卷 105-111页

作者： Kálmán, Viktor Vajta, László Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatics Budapest University of Technology and Economics Magyar Tudósok körútja 2. H-1117 Budapest Hungary Department of Control Engineering and Information Technology Faculty of Electrical Engineering and Informatic Budapest University of Technology and Economics Magyar Tudósok körútja 2. H-1117 Budapest Hungary

Although the invention of the special wheels that move omnidirectional vehicles dates back to the seventies, advances in mechatronics, and control technology keep them constantly on the drawing table of engineers working with mobile robots. The need for eliminating human error becomes ever so obvious when human operators are managing expensive and/or powerful machinery, as the cost of failure can be very high. Omnidirectional platforms are not immune to human error either, however due to their unique working principle they require customized methods. This article presents a trajectory controller for omnidirectional transport robots that is able to correct their trajectory during braking even when high disturbances are present. A method for tuning the controller to achieve a desired behavior is presented. The results are demonstrated by simulation, in Modelica -Dymola environment.

关键词： Brakes

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A LabVIEW-Based Simulator for the Activated Sludge Process

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IFAC Proceedings Volumes 2012年第2期45卷 942-947页

作者： Norhaliza Abdul Wahab Muhammad Sani Gaya Yahaya Md Sam Ulf Jeppsson Reza Katebi Control and Instrumentation Department Faculty of Electrical Engineering Universiti Teknologi MalaysiaUTM Skudai 81310 Johor Malaysia (Tel:+607-5535418) Div of Industrial Electrical Engineering and Automation (IEA) Dept of Measurement Technology and Industrial Electrical Engineering (MIE) Lund University Industrial Control Centre Dept of Electronic and Electrical Engineering University of Strathclyde Glasgow UK

Abstract The activated sludge process is the main process in most urban wastewater treatment systems. It is considered complex in nature, and building its mathematical model in practice becomes difficult. A simple and easy way to build the simulation models for the system is needed. In this paper, a LabVIEW based simulator for the system is presented. LabVIEW offers a highly efficient, simple and flexible platform for simulation and control. Building applications in LabVIEW require less coding, and debugging is easy and fast. The proposed simulator utilizes the Benchmark Simulation Model no.1 (BSM 1) for the biochemical reactor and clarification processes. The operation of the simulator is via a graphical user interface (GUI) built in the LabVIEW environment. The simulation results can be displayed in digital and graphical forms. Simulation results obtained were compared with the results from other software simulation packages in which the COST/IWA Simulation Benchmark has been implemented. The developed simulator is very useful due to its efficiency and accuracy in simulating the wastewater process model. The simulator can serve as a training tool for plant operators/students to provide them with better knowledge and understanding of the process.

关键词： Simulator LabVIEW Activated Sludge Process Wastewater Treatment Plant Simulation Benchmark

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Feature selection of frequency spectrum for modeling difficulty to measure process parameters 1

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9th International Symposium on Neural Networks, ISNN 2012

作者： Tang, Jian Zhao, Li-Jie Li, Yi-Miao Chai, Tian-You Qin, S. Joe Unit 92941 PLA Huludao China College of Information Engineering Shenyang University of Chemical Technology Shenyang China Control Engineering of China Northeastern University Shenyang China Research Center of Automation Northeastern University Shenyang China Work Family Department of Chemical Engineering and Materials Science Ming Hsieh Department of Electrical Engineering University of Southern California Los Angeles CA United States

ISBN: (数字)9783642313622

ISBN: (纸本)9783642313615

Some difficulty to measure process parameters can be obtained using the vibration and acoustical frequency spectra. The dimension of the frequency spectrum is very large. This poses a difficulty in selecting effective frequency band for modeling. In this paper, the partial least squares (PLS) algorithm is used to analyze the sensitivity of the frequency spectrum to these parameters. A sphere criterion is used to select different frequency bands from vibration and acoustical spectrum. The soft sensor model is constructed using the selected vibration and acoustical frequency band. The results show that the proposed approach has higher accuracy and better predictive performance than existing approaches. © 2012 Springer-Verlag.

关键词： Spectroscopy

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MATLAB case-based reasoning GUI application for control engineering education

MATLAB case-based reasoning GUI application for control engi...

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International Conference on information technology Based Higher Education and Training, ITHET

作者： Engin Yesil Cihan Ozturk Berk Cosardemir Leon Urbas Faculty of Electrical and Electronics Engineering Control Engineering Department Istanbul Technical University Maslak Istanbul Turkey Chair of Distributed Control Systems Engineering Institute of Automation Dresden University of Technology Dresden Germany

This paper represents using Case-Based Reasoning (CBR) in order to support undergraduate control engineering students for learning nonlinear systems and control applications. CBR is an experience-based problem solving methodology; thus, it is used for helping control engineering students to design conventional PID controllers for nonlinear systems. For this purpose, GUNT pH neutralization process is used as the experimental setup and a GUI is designed for cased-based reasoning in MATLAB. It is observed that undergraduate students can learn and increase their experience on nonlinear systems using the proposed new CBR-GUI.

关键词： Process control control engineering Cognition MATLAB Databases Libraries

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