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作者： Zhang, Gexiang Gheorghe, Marian Pan, Linqiang Pérez-Jiménez, Mario J. School of Electrical Engineering Southwest Jiaotong University Chengdu 610031 China Department of Computer Science University of Sheffield Regent Court Portobello Street Sheffield S1 4DP United Kingdom Key Laboratory of Image Processing and Intelligent Control Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Department of Computer Science and Artificial Intelligence University of Sevilla Avda. Reina Mercedes s/n Sevilla 41012 Spain

Evolutionary membrane computing is an important research direction of membrane computing that aims to explore the complex interactions between membrane computing and evolutionary computation. These disciplines are receiving increasing attention. In this paper, an overview of the evolutionary membrane computing state-of-the-art and new results on two established topics in well defined scopes (membrane-inspired evolutionary algorithms and automated design of membrane computing models) are presented. We survey their theoretical developments and applications, sketch the differences between them, and compare the advantages and limitations. © 2014 Elsevier Inc. All rights reserved.

关键词： Surveys

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A GPU-based Parallel Simulation Platform for Large-scale Wind Farm Integration

A GPU-based Parallel Simulation Platform for Large-scale Win...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： Haixiang Gao Ying Chen Yin Xu Zhitong Yu Laijun Chen State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University School of Electrical Engineering and Computer Science Washington State University

ISBN: (纸本)9781479936571

Due to the energy crisis of the next fifty years, an increasing number of large-scale wind farms are integrating into power systems. Parallel simulation platforms are indispensable to evaluate the effects of wind farm integration. A GPU-based parallel simulation platform is constructed in this paper to test the feasibility of simulating integration systems on GPU. By adopting previous research work such as averaged model and improved EMTP algorithm, models and algorithm of the platform are firstly introduced. Then the hardware and software architecture of the platform are put forward, which combine CPU configuration and GPU computing. Finally, a wind farm with different numbers of DFIGs are used to test the performance of the platform. Results show that the platform has excellent accuracy, efficiency and scalability. The work of this paper proves the feasibility to simulate wind farm integrating dynamics adopting GPU and its potential to reach tremendous efficiency and scalability.

关键词： Power system simulation Power system modelling

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Finite abstractions of networked control systems 53

Finite abstractions of networked control systems

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2014 53rd IEEE Annual Conference on Decision and control, CDC 2014

作者： Zamani, Majid Mazo, Manuel Abate, Alessandro Department of Electrical Engineering and Information Technology Technische Universität München MunichD-80290 Germany Delft Center for Systems and Control Delft University of Technology Delft CD2628 Netherlands Department of Computer Science University of Oxford OxfordOX1 3QD United Kingdom

ISBN: (纸本)9781479977468

In networked control systems (NCS), the communication between sensors, controllers, and actuators is supported by a shared communication channel that is subject to variable communication delays, limited bandwidth, packet losses, quantization errors, and other practical non-idealities. This work investigates the problem of constructively deriving symbolic models of NCS by simultaneously considering the mentioned network non-idealities. By employing the obtained symbolic models, one can completely automate the design of controllers enforcing rich logical specifications, e.g. formulae in linear temporal logic, over NCS. © 2014 IEEE.

关键词： Networked control systems

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Semidefinite relaxations for optimization problems over rotation matrices

Semidefinite relaxations for optimization problems over rota...

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IEEE Annual Conference on Decision and control

作者： James Saunderson Pablo A. Parrilo Alan S. Willsky Laboratory for Information and Decision Systems Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 USA

ISBN: (纸本)9781467360890

Optimization problems with variables constrained to be in SO(d)--orthogonal matrices with determinant one--arise in attitude estimation, molecular imaging, and computer vision applications, among others. Recently it has been shown that the convex hull of SO(d) can be described in terms of linear matrix inequalities. This allows us to devise new semidefinite programming-based reformulations and relaxations of problems involving rotation matrices. In this paper we illustrate the use of these techniques for two different types of optimization problems over SO(d). The first type of problem arises in jointly estimating the attitude and spin-rate of a spin-stabilized satellite. We show how to exactly reformulate such problems as semidefinite programs. The second type of problem arises when estimating the orientations of a network of objects (such as cameras, satellites or molecules) from noisy relative orientation measurements. For this class of problems we formulate new semidefinite relaxations that are tighter than those existing in the literature, and show that they are exact when the underlying graph is a tree.

关键词： Optimization Estimation Satellites Joints Symmetric matrices Yttrium Noise measurement

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Middleware solutions for service-oriented remote laboratories: A review

Middleware solutions for service-oriented remote laboratorie...

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IEEE Education engineering (EDUCON)

作者： Mohamed Tawfik Elio Sancristobal Salva Ros Roberto Hernandez Antonio Robles Agustín Caminero Llanos Tobarra Miguel Latorre Felix Garcia-Loro German Carro Gabriel Diaz Manuel Castro Electrical & Computer Engineering Department (DIEEC) Madrid Spain Control and Communication Systems Department (SCC) Spanish University for Distance Education (UNED) Madrid Spain Electrical & Computer Engineering Department (DIEEC) Spanish University for Distance Education (UNED) Madrid Spain

The evolution of Web 3.0 and consequently eLearning 3.0 have demanded a major change of the way learning objects are provided and implemented. It is foreseen that learning objects in eLearning 3.0 should be interoperable and easily discovered, and will represent any kind of virtual or physical object. Several approaches attempted to implement remote Laboratories as a Service (LaaS) in order to achieve such interoperability and to allow their integration into heterogeneous educational systems for pedagogical purposes and for more convenience, as well as, their coupling and mashing up with other learning objects in order to yield a scaffold and rich educational environment. This paper provides a broad study on the available middleware solutions for service-oriented remote laboratories implementation, emphasizing the pros and cons of each and the upcoming challenges in developing service-oriented remote laboratories.

关键词： Remote laboratories Web services Interoperability Java Standards

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A Novel Approach to Design EV Battery Chargers Using SEPIC PFC Stage and Optimal Operating Point Tracking Technique for LLC Converter

A Novel Approach to Design EV Battery Chargers Using SEPIC P...

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Annual IEEE Applied Power Electronics Conference and Exposition

作者： Haoyu Wang Serkan Dusmez Alireza Khaligh Power Electronics Energy Harvesting and Renewable Energies Laboratory Electrical and Computer Engineering Department and Institute for Systems Research University of Maryland

ISBN: (纸本)9781479923250

In this paper, a plug-in electric vehicle battery charger is proposed based on SEPIC PFC and LLC topologies. In addition, a new approach in introduced to actively control the dc link voltage and track the maximum efficiency point of a LLC converter over the wide voltage range of the high voltage battery pack Comprehensive circuit modeling and loss analysis at maximum efficiency point of LLC converter are carried out. A 3.3 kW charger, charging the Li-ion battery with an output voltage range of 100 V to 420 V from variable dc link voltage, is designed and simulated. In comparison to conventional approaches, the LLC stage demonstrates 4.4% efficiency improvement at the heaviest load condition and 16.5% efficiency improvement in the lightest load condition.

关键词： BATTERY CHARGERS DC link voltage maximum efficiency load condition output voltage range Converters Electric vehicles Power factor correction Tracking Techniques Workstations lithium ion battery

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A Novel control Method for Neutral Point Clamped Inverters with a Single Z-Source Network

A Novel Control Method for Neutral Point Clamped Inverters w...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Xiangyang Xing Alian Chen Weisheng Wang Chenghui Zhang Vahid Najmi School of Control Science and Engineering Shandong University Center for Power Electronics Systems The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University

ISBN: (纸本)9781479940318

The Z-source neutral point clamped (NPC) inverters can realize buck-boost energy conversion with all satisfying advantages of the three-level inverters. A significant problem related to this topology is the fluctuation of the neutral-point potential (NP). However, the previous modulation techniques for this topology cannot achieve the considerate stable voltage. In this paper, based on the analysis of the relationship among the shoot-through duty cycle and the NP voltage, the average NP current, switching frequency capacitor value, a new feed-forward compensator by modifying the shoot-through duty cycle which can improve to balance the NP voltage balancing is proposed. Meanwhile, in consideration of a low voltage gain caused by the NP voltage balance method, a new control method based on a maximum constant boost control method is proposed, which brings the benefits in both high voltage gain and low-frequency ripple. The considerate stable NP voltage and the high voltage gain have been proven in simulation and through experimental results from a prototype converter.

关键词： Z-source neutral point clamped (NPC) inverter High voltage gain Balance the neutral-point potential (NP) voltage

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Aircraft-on-ground path following control by dynamical adaptive backstepping

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Chinese Journal of Aeronautics 2013年第3期26卷 668-675页

作者： Chen Bihua Jiao Zongxia Shuzhi Sam Ge Science and Technology on Aircraft Control Laboratory Beihang University Department of Electrical & Computer Engineering National University of Singapore

The necessity of improving the air traffic and reducing the aviation emissions drives to investigate automatic steering for aircraft to effectively roll on the ground. This paper addresses the path following control problem of aircraft-on-ground and focuses on the task that the aircraft is required to follow the desired path on the runway by nose wheel automatic steering. The proposed approach is based on dynamical adaptive backstepping so that the system model does not have to be transformed into a canonical triangular form which is necessary in conventional backstepping design. This adaptive controller performs well despite the lack of information on the aerodynamic load and the tire cornering stiffness parameters. Simulation results clearly demonstrate the advantages and effectiveness of the proposed approach.

关键词： Adaptive control Aircraft-on-ground Backstepping Nonlinear dynamical systems Path following

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Optimal scheduling of single-arm multi-cluster tools with two-space buffering modules

Optimal scheduling of single-arm multi-cluster tools with tw...

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2014 IEEE International Conference on Automation Science and engineering, CASE 2014

作者： Yang, Fajun Wu, Naiqi Qiao, Yan Zhou, Mengchu Department of Industrial Engineering School of Electro-Mechanical Engineering Guangdong University of Technology Guangzhou510006 China Institute of Systems Engineering Macau University of Science and Technology China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai201804 China Department of Electrical and Computer Engineering New Jersey Institute of Technology NewarkNJ07102-1982 United States

A multi-cluster tool is composed of a number of single-cluster tools linked by buffering modules. The capacity of a buffering module can be one or two. Aiming at finding an optimal one-wafer cyclic schedule, this work explores the effect of two-space buffering modules on the performance of a multi-cluster tool. The tool is modeled by a kind of Petri nets. The dynamic behavior of robot waiting and tasks, process modules, and buffers is well captured by the net model. With the model, this work shows that there is always a one-wafer cyclic schedule that reaches the lower bound of the cycle time of a process-dominant tool. Furthermore, a constant-time algorithm is revealed to find such a schedule for the first time for such multi-cluster tools. An illustrative example is given to show the application and power of this new method. © 2014 IEEE.

关键词： Petri nets

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Fast Distributed Power Regulation Method via Networked Thermostatically controlled Loads

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IFAC Proceedings Volumes 2014年第3期47卷 5439-5444页

作者： Hao Xing Yuting Mou Zhiyun Lin Minyue Fu Department of Control Science and Engineering Zhejiang University China State Key Laboratory of Industrial Control Technology College of Electrical Engineering Zhejiang University 38 Zheda Road Hangzhou 310027 P. R. China School of Electrical Engineering and Computer Science University of Newcastle NSW 2308 Australia

This paper studies the problem of countering the fluctuations of renewable power supply in smart grid. A fully distributed algorithm to control a network of thermostatically controlled loads (TCLs) is proposed to match, in real time, the aggregated power consumption of the TCLs and the forecast power supply. The algorithm is developed by converting the control problem into a consensus problem of individual utility functions. We then show that the problem is equivalent to a convex optimization problem and an algorithm based on distributed bisection method is presented to solve the problem. The proposed algorithm converges fast and is fully distributed, requiring only local information for each TCL and limited communication with neighboring TCLs, yet the available power supply is fairly dispatched among different TCLs. A numerical example is given to illustrate the effectiveness of the algorithm when applied to a network of variable-frequency air-conditioners (VFACs).

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