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13th European Control Conference (ECC)

作者： Petrovic, Vlaho Jelavic, Mate Baotic, Mato Univ Zagreb Fac Elect Engn & Computat Zagreb 41000 Croatia Koncar Elect Engn Inst Zagreb Croatia

ISBN: (纸本)9783952426913

To enable further growth of wind turbine dimensions and rated power, it is essential to decrease structural loads that wind turbines experience. Therefore a great portion of research is focused on control algorithms for reduction of structural loads, but typically wind turbine rotor is considered to be perfectly symmetrical, and therefore such control algorithms cannot reduce structural loads caused by rotor asymmetries. In this paper, the reduction of wind turbine structural loads caused by rotor asymmetries is discussed. To this aim, suitable transformation of structural loads and control algorithm based on such transformation are proposed. Simulation results show that proposed control algorithm is capable of reducing structural loads caused by rotor asymmetries.

关键词： Blades Delays Harmonic analysis Oscillators Rotors Standards Wind turbines Structural loads Wind Energy Conversion Systems computer algorithms Rotors Blades Fourier analysis Oscillators delay

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Neural Networks and Neuroscience-Inspired computer Vision

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CURRENT BIOLOGY 2014年第18期24卷 R921-R929页

作者： Cox, David Daniel Dean, Thomas Harvard Univ Ctr Brain Sci Cambridge MA 02138 USA Harvard Univ Dept Mol & Cellular Biol Cambridge MA 02138 USA Harvard Univ Sch Engn & Appl Sci Cambridge MA 02138 USA Google Res Mountain View CA 94043 USA Brown Univ Dept Comp Sci Providence RI USA

Brains are, at a fundamental level, biological computing machines. They transform a torrent of complex and ambiguous sensory information into coherent thought and action, allowing an organism to perceive and model its environment, synthesize and make decisions from disparate streams of information, and adapt to a changing environment. Against this backdrop, it is perhaps not surprising that computer science, the science of building artificial computational systems, has long looked to biology for inspiration. However, while the opportunities for cross-pollination between neuroscience and computer science are great, the road to achieving brain-like algorithms has been long and rocky. Here, we review the historical connections between neuroscience and computer science, and we look forward to a new era of potential collaboration, enabled by recent rapid advances in both biologically-inspired computer vision and in experimental neuroscience methods. In particular, we explore where neuroscience-inspired algorithms have succeeded, where they still fail, and we identify areas where deeper connections are likely to be fruitful.

关键词： NEURAL circuitry NEUROSCIENCES computer vision DECISION making ARTIFICIAL intelligence computer science computer algorithms

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Interleaved Luo Converter for The Residential PV Grid Connected Systems

Interleaved Luo Converter for The Residential PV Grid Connec...

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Asian Control Conference

作者： Mary Helna Muttath P. Baburaj Depatment of Electrical and Electronics Engineering Govt. College of Engineering

ISBN: (纸本)9781479978632

The new research trend in the residential solar generation systems, is to employ the parallel connected PV configuration rather than the series-connected configuration to satisfy the safety requirements and to make full use of the PV generated power. A novel interleaved Luo converter is proposed for the high voltage gain DC-DC conversion which integrates the merits of interleaved topologies and switched capacitor based topologies. The Super Lift (SL) Luo converter is becoming very popular in the DC-DC conversion processes due to high voltage gain, and simple circuitry. By using the interleaving technique, the input current ripple and output voltage ripple of the elementary SL Luo converter is reduced. Hence the proposed topology is suitable for the DC-DC conversion at the output of parallel/series-parallel connected PV modules, since the low ripple current at the output of PV module will improve the life span of the same. Incremental conductance based MPPT control algorithm, along with a PI controller is implemented in this paper. The disadvantage of the interleaved topology is the large component count. However, component ratings of the Interleaved SL Luo converter are reduced to half of that of a SL Luo converter. Hence the cost of the interleaved circuit can be justified.

关键词： DC conversion Converters Pv modules safety requirements Polydnaviridae PI control Voltage gain Longevity Life span capacitor switching computer algorithms Domestic architecture

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Flame extinguishment by cooperation of two aerial extinguishers

Flame extinguishment by cooperation of two aerial extinguish...

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IEEE/SICE International Symposium on System Integration

作者： Yasushi Iwatani Hiroyuki Torikai Department of Science and Technology Hirosaki University

ISBN: (纸本)9781467372435

Fire extinguishment approaches with inert gas such as carbon dioxide (CO_2) or nitrogen (N_2) have several advantages compared with ones with water. On the other hand, they have low extinguishment performance and put lives at risk. To enhance the extinguishment performance and to reduce risk to life, the authors have proposed a robotic fire extinguishment approach with massive aerial extinguishers with inert gas. This paper proposes a control algorithm for multiple aerial extinguishers without any markers, while a single extinguisher with an easily extracted marker has been controlled in our previous work. This paper also demonstrates flight control of two extinguishers and flame extinguishment by cooperation with two extinguishers. The cooperative behavior in the flame extinguishment experiment is not explicitly programmed, and the two extinguishers are simply controlled by trajectory tracking using PID controllers.

关键词： EXTINGUISHERS(FIRE) Fire suppression computer algorithms Carbon Dioxide rare gases At-risk Aircraft control trajectory tracking Proportional Integral Derivative Control nitrogen fixation

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Implementation of an Asymmetric Relay Autotuner in a Sequential Control Language

Implementation of an Asymmetric Relay Autotuner in a Sequent...

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IEEE International Conference on Automation Science and Engineering

作者： Alfred Theorin Josefin Berner Department of Automatic Control Lund University

ISBN: (纸本)9781467381840

Control applications contain both logic, sequencing, and control algorithms. A holistic view of this is seldom presented in teaching and papers. One reason is the separation of communities - automation groups typically come from the Programmable Logic Controller (PLC) world while control engineers primarily come from the Distributed Control System (DCS) world. Both logic, sequencing, and control algorithms are, however, well integrated in today's control systems since DCS systems now contain logic and sequencing and PLCs now contain control algorithms. This paper shows that both logic, sequencing, and control algorithms can be integrated seamlessly in a sequential control language. The particular application considered is a PID controller with a relay autotuner. The presented autotuner implementation yields good controller parameters and is freely available.

关键词： computer algorithms sequential control Formal logic Proportional Integral Derivative Control relay Analyses, Sequence COMMAND AND CONTROL LANGUAGES Programmable logic controllers control engineering Language DC SYSTEMS Sequencing

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Programmable Logic Controller based Embedded Quadratic Programming for input-constrained Internal Model Control

Programmable Logic Controller based Embedded Quadratic Progr...

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European Control Conference

作者： Ambrose. A. Adegbege Eric Mauro Department of Electrical and Computer Engineering The College of New Jersey

ISBN: (纸本)9781467371605

Advanced control algorithms such as optimization-based controls are known to offer superior performance as well as systematic constraints handling when compared to classical control strategies. However, the complexity of such advanced control methods makes their implementations difficult, especially on controllers with limited computational capacity such as the programmable logic controllers (PLC). This paper presents the capability of a low-cost low-end PLC for online computation of advanced control. In particular, an online quadratic program within the framework of input-constrained internal model control is implemented, and the effectiveness is illustrated using a hardware-in-the-loop experiment.

关键词： Programmable logic controllers logic controller quadratic programming Advanced controls Model control internal model control computer algorithms Control Methods PROGRAMMABLE Controllers

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A Hardware-In-the-Loop Setup for Rapid Control Prototyping of Mechatronic Systems

A Hardware-In-the-Loop Setup for Rapid Control Prototyping o...

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IEEE Conference on Emerging Technologies and Factory Automation

作者： Luca Simoni Manuel Beschi Davide Colombo Antonio Visioli Riccardo Adamini Dipartimento di Ingegneria Meccanica e Industriale University of Brescia Istituto di Tecnologie Industriali e Automazione National Research Council Gefran SpA

ISBN: (纸本)9781467379304

In this paper we present a Hardware-In-the-Loop setup for the simulation of complex mechatronic systems. The setup consists of two coupled brushless motors. One of them is the motor under test, which is used to design the control algorithm and to test the control software, while the other one simulates the device to be controlled. Libraries of mechanical and hydraulic components have been implemented in an IEC61131-3 language so that a complex system can be simulated in a relatively easy way and this allows for a rapid control prototyping. Practical issues are discussed and an illustrative example is shown to confirm the effectiveness of the setup.

关键词： HARDWARE IN THE LOOP computer algorithms Microelectromechanical devices hydraulic cells Complex systems PROTOTYPE simulating computer hardware Brushless motors Motor Standing Orders

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Synthetic Tracking Controller for Robot Manipulator with Flexible Joints, Dynamics of Executive Motors and Affect of Disturbance Based on Radial Basic Function (RBF) Neural Network

Synthetic Tracking Controller for Robot Manipulator with Fle...

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2014 IEEE International Conference on Robotics and Biomimetics (ROBIO)

作者： Tien Thanh Nguyen Hai Van Nguyen Tien Vu Hoa Le Quy Don Univ Hanoi Vietnam Dept Control Engn Hanoi Vietnam Phu Tho Vocat Coll Technol & Agroforestry Phu Ninh Phu Tho Town Ph Vietnam

ISBN: (纸本)9781479973972

This paper presents synthetic checking controller for robot manipulator with flexible joints, dynamics of executive motors and affect of disturbance based on radial basic function (RBF) neural network. A control algorithm is synthesized basing on the combination of backsteppping and RBF neural network in order to approximate the unknown functions. Finally, simulation results of a manipulator robot with single flexible joints based on Matlab-Simulink are presented to demonstrate the effectiveness of the proposed control algorithms

关键词： Robot Manipulator computer algorithms manipulator robot disturbance basis functions Neural network Motor Joints Joints Engines tracking controller Top Level Managers FLEXIBLE disturbances

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Implementing influence diagram concepts to optimize border patrol operations using unmanned aerial vehicles

Implementing influence diagram concepts to optimize border p...

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作者： Karki, Ashish University of Nevada Las Vegas

学位级别：M.S.

The most common approach for border patrol operations is the use of human personnel and manned ground vehicles, which is expensive, at times inefficient and sometimes even hazardous to people involved. The length of the US border, mostly covering unpopulated areas, with harsh atmospheric conditions makes it more susceptible to illegal human activities. Automated border surveillance by unattended, fixed, ground sensors forming an electronic fence has proven expensive, inefficient and was prone to unacceptable rate of false alarms. A better approach would be using Unmanned Aerial Vehicles (UAVs) in combination with such ground sensors. This would help improve the overall effectiveness of the surveillance system as a UAV could first scan the alert area before sending in personnel and vehicles, if deemed necessary. In this thesis, we are proposing border surveillance using multiple Unmanned Aerial Vehicles (UAVs) in combination with alert stations consisting of Unattended Ground Sensors (UGSs) along the border line or fence. Upon detecting an event, an alert would be triggered by any UGS. We simulate this process by reading probability data for different timestamps from a text file. And, based on utility values of each stations, two UAVs decide on which alert stations to service.

关键词： Aerial surveillance Border patrols computer algorithms Drone aircraft U.S. Border Patrol

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Métodos de otimização aplicados no ajuste de ESPS e controladores de amortecimento inseridos no FACTS TCSC em sistemas elétricos de potência

Métodos de otimização aplicados no ajuste de ESPS e contr...

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作者： Menezes, Maxwell Martins de Universidade Estadual Paulista

O trabalho tem como propósito principal a análise da estabilidade a pequenas perturbações em Sistemas Elétricos de Potência, que é representado pelo Modelo Sensibilidade de Potência. São analisados três sistemas teste, conhecidos na literatura como Sul-Brasileiro, simétrico de duas áreas e New England. A princípio os sistemas teste foram submetidos a um ponto de operação de modo a serem instáveis. É proposta a utilização dos Estabilizadores de Sistema de Potência e do dispositivo Thyristor Controlled Series Capacitor em conjunto com o controlador Power Oscillation Damping. Estes controladores possuem a função de inserir amortecimento adicional às oscilações de baixa frequência do Sistema Elétrico de Potência. Neste caso é necessário alocar e ajustar os parâmetros dos respectivos controladores de forma correta. As localizações dos controladores são determinadas pelos fatores de participação (Estabilizadores de Sistema de Potência) e a distância entre polo de interesse e zero da função de transferência de malha aberta do controlador Power Oscillation Damping (conjunto Thyristor Controlled Series Capacitor-Power Oscillation Damping). Para o ajuste de parâmetros dos controladores (Estabilizadores de Sistema de Potência e Power Oscillation Damping) são utilizados dois algoritmos de otimização baseados em enxame de partículas, sendo eles o Particle Swarm Optimization e de Bacterial Foraging Optimization orientado pelas formas de movimentação do Particle Swarm Optimization. A atuação dos controladores alocados e ajustados de acordo com os métodos propostos aumenta o amortecimento dos modos oscilatórios de baixa frequência dos sistemas teste. Este fato é verificado pela análise dos resultados obtidosThis work aims to analyze small signal stability in power systems represented by the power sensitivity model. Three test systems known in the literature, such as South Brazilian, Two Symmetrical Areas and New England are analyzed. At first, the systems were submitted to an opera

关键词： Sistemas de energia eletrica - Estabilidade Algoritmos de computador Controle por tiristores Controle automatico - Sensibilidade computer algorithms Tese de doutorado

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