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Chinese Control Conference (CCC)

作者： Shuping Wang Guoshan Zhang Zhiqiang Zuo Wanquan Liu School of Electrical Engineering and Automation Tianjin University 300072 China Department of Computing Curtin University WA 6102 Australia

In this paper a new type of proportional-integral-derivative (PID) controllers is designed to make the closed-loop linear system asymptotically stable and strictly quadratic dissipative. First, we give a state-space realization for such PID controller and then derive the state-space realization of closed-loop system. Second, a necessary and sufficient condition ensuring the closed-loop system to be asymptotically stable and quadratic dissipative is derived in terms of linear matrix inequality (LMI). Based on this result, the explicit expression for the PID controller gains is presented. Finally, an illustrative example is given to demonstrate the effectiveness of the proposed design approach.

关键词： Symmetric matrices Matrices Linear systems Control systems Tuning Transfer functions Aerospace electronics

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Expected and measured values of luminance sensors in dualaxis photovoltaic positioning system

Expected and measured values of luminance sensors in dualaxi...

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Joint IMEKO TC11-TC19-TC20 International Symposium Metrological Infrastructure, Environmental and Energy Measurement and International Symposium of Energy Agencies of Mediterranean Countries, IMEKO-MI 2011

作者： Gasparac, I. Vrazic, M. Petrovic, I. Department of Electrical Machines and Automation Faculty of Electrical Engineering and Computing University of Zagreb Unska 3 HR-10000 Zagreb Croatia Office of Certified Electrical Engineer Igor Petrovic Pitomaca Croatia Ured Ovlastenog Inzenjera Elektrotehnike Igor Petrovic Pitomaca Croatia

ISBN: (纸本)9781618391186

A dual-axis photovoltaic positioning system has a primary task of directing a PV module towards the optimal light source when placed on electric vehicle. The idea of a positioning loop requires proper information on the PV module direction in order to get more irradiance, i.e. more energy. The assumption of a proper luminance sensor distribution is described in this paper. With this kind of distribution every angle position is described by a unique combination of luminance sensor readings. This paper compares expected readings and measured readings of a real model.

关键词： Luminance

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Bus rapid transit (BRT) parallel system based on ACP approach

Bus rapid transit (BRT) parallel system based on ACP approac...

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World Congress on Intelligent Control and automation (WCICA)

作者： X.-S. Dong Gang Xiong Dong Fan F.-H. Zhu Li Xie Dongguan Research Institute of CASIA Cloud Computing Industrial Technology Innovation and Incubation Center Chinese Academy of Sciences Beijing China Dongguan Research Institute of CASIA Cloud Computing Industrial Technology Innovation and Incubation Center Chinese Academy of Sciences Dongguan China Dongguan Research Institute of CASIA Cloud Computing Industrial Technology Innovation and Incubation Center Chinese Academy of Sciences 523808 China Institute of Automation Chinese Academy of Sciences Beijing Beijing CN Zhejiang Provincial Key Laboratory of Information Network Technology Department of information Science and Electronic Engineering University of Zhejiang Hangzhou China

ISBN: (纸本)9781467313971

Bus Rapid Transit (BRT) is an effective way to improve urban traffic status. But, because of its complexity, it is difficult in its operation management and scheduling. In this article, based on ACP approach, Parallel BRT System is constructed, which can detect real-time passenger flow at stations, traffic flow at stations and intersections and queuing length of vehicles on the road; to provide short-term passenger and traffic saturation prediction in order to timely arrange transportation management and relieve congestion; to assess, improve and optimize the emergency management of holidays, events, accidents and other emergencies; to improve the quality of real-time scheduling functions based on the measurement results detected from videos, and so on. This system has been applied in Guangzhou Zhongshan Avenue BRT, which was applied for BRT's monitoring, warning, forecasting, emergency management, real-time scheduling and other needs, to guarantee BRT's smooth, safety, efficiency and reliability.

关键词： Job shop scheduling Real-time systems Global Positioning System automation Transportation Intelligent control Laboratories

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Analysis of Concept Similarity Methods Applied to an LSH Function

Analysis of Concept Similarity Methods Applied to an LSH Fun...

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IEEE Annual International Computer Software and Applications Conference (COMPSAC)

作者： Luciano B. de Paula Rodolfo S. Villaca Mauricio F. Magalhaes Department of Computer Engineering and Industrial Automation School of Electrical and Computer Engineering State University of Campinas Brazil Department of Engineering and Computing (DECOM/CEUNES) Federal University of Espírito Santo Brazil

In literature, there are several methods to measure similarity between concepts in structures like simple ontologies, concept hierarchies, taxonomies, etc. These measures are used to search for similar concepts. In the Semantic Web, such structures are commonly used to classify data which opens the possibility of reasoning upon them and helps in conceptual searches. Besides that, the Locality Sensitive Hash (LSH) functions are used to store similar data close to each other in an index space. Each family of LSH functions is tied to a specific similarity function. In this paper we propose a method for combining the idea of conceptual similarity with LSH functions. This method permits the data classified as similar concepts be indexed close to each other respecting some metric. The main idea is to facilitate the conceptual searching for data semantically classified. This paper evaluates several methods of measuring the similarity between concepts in a simple ontology and discusses how they can be applied to an LSH function.

关键词： Ontologies Measurement Distributed databases Correlation Semantics Hamming distance Indexing

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Global robust output regulation for a class of multivariable systems and its application to a motor drive system

Global robust output regulation for a class of multivariable...

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2011 American Control Conference (ACC)

作者： Zhaowu Ping Jie Huang Applied Control and Computing Laboratory Department of Mechanical and Automation Engineering Chinese University of Hong Kong Sha Tin Hong Kong China

In this paper, we study the global robust output regulation problem for a class of multivariable nonlinear systems. The problem is first converted into a stabilization problem of an augmented system composed of the original plant and an internal model. The augmented system is a two-input system containing both dynamic uncertainty and time-varying static uncertainty. By decomposing the two-input control problem into two single-input control problems, we can solve the problem via a recursive approach utilizing the changing supply function technique. Finally, the theoretical result is applied to the speed tracking control and load torque disturbance rejection problem of a surface-mounted PM synchronous motor.

关键词： Robustness Synchronous motors Mathematical model State feedback Equations Trajectory Uncertainty

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Assessing the performance of a swarm-based biclustering technique for data imputation

Assessing the performance of a swarm-based biclustering tech...

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Congress on Evolutionary Computation

作者： Rosana Veroneze Fabrício O. de França Fernando J. Von Zuben Laboratory of Bioinformatics and Bioinspired Computing (LBiC) Department of Computer Engineering and Industrial Automation (DCA) State University of Campinas-UNICAMP Sao Paulo Brazil

Although the missing data problem has been studied for many years, it is still a relevant and challenging problem nowadays. Data can be missing for a variety of reasons, and there are several techniques capable of processing missing data. A parcel of them tries to estimate the missing values. This technique is called imputation. Recently, it was proposed a biclustering algorithm, based on Swarm Intelligence, named SwarmBCluster, to impute missing data. As it is a novel and promising algorithm, this paper intends to investigate the influence of its parameters on the performance. To achieve this objective, this paper will compare SwarmBCluster with other two imputation algorithms and, after that, it will perform a sensitivity analysis. The quality of the imputations is measured with the Root Mean Squared Error (RMSE). The experiments showed that SwarmBCluster presents good results concerning the RMSE metric and that the proper choice of parameters can considerably improve the performance of the algorithm.

关键词： Algorithm design and analysis Data models Measurement Coherence Databases Mathematical model Filtering

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Motion vehicles tracking in intelligent transportation visual surveillance systems

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Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology 2012年第SUPPL.2期36卷 216-222页

作者： Wu, Lin-Feng Xiong, Gang Qian, Shou-Yi Xie, Li Zhejiang Provincial Key Lab. of Information Network Technology Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 China Cloud Computing Industrial Technology Innovation and Incubation Center Dongguan Research Institute of CASIA Chinese Academy of Sciences Dongguan 523808 China Wenzhou Research Institute of Electronics and Information Wenzhou 325003 China

In terms of the difficulty of vehicle tracking in complex environment of the visual surveillance system, an object tracking algorithm is proposed for the applications in practical visual surveillance systems for intelligent traffic. A block-based Gaussian mixture background modeling method for object detection is presented to reduce the computational complexity of moving vehicle object abstraction. An adaptive tracking algorithm fused with color features and texture features is described to better adapt the traffic scene variation. The experimental results show that the proposed algorithm can effectively deal with the complex urban traffic conditions and the tracking performance is better than the conventional particle filter method and single feature based non-adaptive object tracking method.

关键词： Tracking (position)

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A neural architecture to address Reinforcement Learning problems

A neural architecture to address Reinforcement Learning prob...

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International Joint Conference on Neural Networks (IJCNN)

作者： Rodrigo L. S. de Arruda Fernando J. Von Zuben Laboratory of Bioinformatics and Bioinspired Computing (LBiC) Department of Computer Engineering and Industrial Automation (DCA) School of Electrical and Computer Engineering (FEEC) University of Campinas Campinas Sao Paulo Brazil

In this paper, the Reinforcement Learning problem is formulated equivalently to a Markov Decision Process. We address the solution of such problem using a novel Adaptive Dynamic Programming algorithm which is based on a Multilayer Perceptron Neural Network composed of a parameterized function approximator called Wire-Fitting. Extending such established model, this work makes use of concepts of eligibility to conceive faster learning algorithms. The advantage of the proposed approach is founded on the capability to handle continuous environments and to learn a better policy while following another. Simulation results involving the automatic control of an inverted pendulum are presented to indicate the effectiveness of the proposed algorithm.

关键词： Mathematical model Equations Monte Carlo methods Heuristic algorithms Markov processes Approximation methods Dynamic programming

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Extracting additive and multiplicative coherent biclusters with swarm intelligence

Extracting additive and multiplicative coherent biclusters w...

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Congress on Evolutionary Computation

作者： Fabrício O. de França Fernando J. Von Zuben Laboratory of Bioinformatics and Bioinspired Computing (LBiC) Department of Computer Engineering and Industrial Automation (DCA) School of Electrical and Computer Engineering (FEEC) State University of Campinas-UNICAMP Sao Paulo Brazil

Biclustering is usually referred to as the process of finding subsets of rows and columns from a given dataset expressing a relationship. Each subset is a bicluster and corresponds to a sub-matrix whose elements tend to present a high degree of coherence with each other, that may lead to novel discoveries regarding the objects in the dataset. This coherence leads to the possibility of obtaining representative values for rows (subset of objects) and columns (subset of attributes) of each bicluster. In the literature, it is usually studied the additive coherence among elements, i.e. each element is represented by the sum of its respective representative values. But in a given dataset, it is also possible to find multiplicative relations, i.e. each element being represented by the multiplication of its respective representative values, and that may reveal distinct knowledge contained in the objects of the dataset. So, in this paper, a swarm based approach, named SwarmBcluster, is adapted to find both additive and multiplicative coherent biclusters from a dataset, in an attempt to enrich the amount of information provided by the biclusters. Experiments are performed considering two well known datasets and it is found that the multiplicative coherence biclusters improve the quality of the data analysis and may contribute to reduce the influence of noise.

关键词： Coherence Additives Data mining Humans Data analysis Indexes

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User P-Q diagram as a tool in reactive power trade

User P-Q diagram as a tool in reactive power trade

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International Conference on European Electricity Market, EEM

作者： Ivan Ilic Alfredo Viskovic Mario Vrazic Department of Electric Machines Drives and Automation Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia HEP d. d. Zagreb Croatia

Trading with reactive power will soon become a very important part of electric energy trade. However, while trading, voltage regulation in portable and distribution systems must not be neglected. In order to balance the technical and economic aspects it is necessary to be familiar with the electric power system, the source of electric energy most of all, meaning the synchronous generator and its possibilities. These possibilities are shown in the synchronous generator P-Q diagram. We nowadays use static P-Q diagrams, provided by generator producers, which in most cases refer only to generators. This article presents a dynamic user P-Q diagram containing changeable parameters and showing a real availability of a synchronous aggregate.

关键词： Current measurement Generators Voltage measurement Temperature measurement Aggregates Probes Load modeling

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