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IEEE International Symposium on Power Electronics for Distributed Generation systems (PEDG)

作者： Shlomo Gadelovits Visakan Kadirkamanathan Qing-Chang Zhong Alon Kuperman Dept of Automatic Control and Systems Engineering The University of Sheffield UK Dept of Automatic Control and Systems Engineering Illinois Institute of Technology USA Dept of Electrical and Electronics Engineering Ariel University Israel

This paper proposes a new decentralized control strategy for parallel inverters operating in an islanded Microgrid. The proposed technique uses the Uncertainty and Disturbance Estimation (UDE) strategy in order to generate a virtual output impedance while keeping the voltage of the internal Elctro-Motive Force (EMF) source equal for all the inverters in the system. The system achieves accurate current sharing over a broad spectrum, which is proportional to the inverter capacity. Simulation results are provided to illustrate the performance of this method 1 .

关键词： Inverters Impedance Voltage control Harmonic analysis Mathematical model Microgrids Load modeling

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Online Prediction of Activities with Structure: Exploiting Contextual Associations and Sequences

Online Prediction of Activities with Structure: Exploiting C...

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IEEE-RAS International Conference on Humanoid Robots

作者： Nicholas H. Kirk Karinne Ramirez-Amaro Emmanuel Dean-Leon Matteo Saveriano Gordon Cheng Department of Electrical and Computer Engineering Institute of Automatic Control Engineering Technical University of Munich Department of Electrical and Computer Engineering Institute for Cognitive Systems Technical University of Munich

ISBN: (纸本)9781479968862

Many human activities, given their intrinsic modularity, present structural information which can be exploited by classification algorithms: this enhances the capability of robots to predict activities. We introduce a semantic reasoning paradigm in which, via logical and statistical learning, we discriminate between actions on the basis of contextual associations. An example of this is considering the co-occurrence of scenario objects when predicting an action. We also combine such probabilistic reasoning with traditional sequence likelihood modeling. The system, given partial execution evidence of a task (e.g. assembling a car), first reasons in logical terms over qualitative primitives to constrain the space of possibilities, and then predicts the most sequentially likely action (e.g. 'PickAnd-PutScrew'). A further claim is also the representation of actions in tractable logic, enabling online-capable recognition. Our evaluation, adopting annotated primitives of motion and tool usage, proves that simple sequence-only prediction methods (i.e. bigram sequence information, 59.80%) are outperformed by the proposed polynomial-time context- and sequence- aware inference (i.e. with 8 primitives, various degrees of partial evidence and bigram sequence information, 78.43%), proving the effectiveness of the combined approach.

关键词： Contextual Associations Soft computing logical Bigram Statistical learning Action Prediction methods Human Activities Robot

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A backstepping control method for a nonlinear process-two coupled-tanks

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: electrical engineering and Computer Science 2015年第3 3期77 77卷 67-76页

作者： Calofir, Vasile Tʇnasʇ, Valentin Fʇgʇrʇşan, Ioana Stamatescu, Iulia Arghira, Nicoleta Stamatescu, Grigore Department of Automatic Control and Industrial Informatics University POLITEHNICA of Bucharest Romania Automatic Control and Systems Engineering Department University POLITEHNICA of Bucharest Romania

The aim of this work is to compute a level backstepping control strategy for a coupled tanks system. The coupled tanks plant is a component included in the water treatment system of power plants. The nonlinear-model of the process was designed and implemented in Matlab-Simulink. The advantages of the control method proposed is that it takes into consideration the nonlinearity which can be useful for stabilization and a larger operating point with specified performances. The backstepping control method is computed using the nonlinear model of the system and the performance was validated on the physical plant.

关键词： Backstepping

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Design of a flexure-based XY positioning stage with balanced axial forces on decoupling modules

Design of a flexure-based XY positioning stage with balanced...

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International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO)

作者： Zhen Zhang Zhiqing Liu Peng Yan Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control Tsinghua University Beijing China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University Hangzhou China Department of Mechanical Engineering Beijing China School of Automation Science and Electrical Engineering Beihang University Beijing China School of Mechanical Engineering Shandong University Jinan China

ISBN: (纸本)9781509029464

This paper presents a novel beam flexure-based XY positioning stage with an axial force balanced design of double parallelogram decoupling modules. By mean of connecting two decoupling modules along the same actuation axis, the axial forces are evenly applied to each side of the motion stage. Therefore the in-plane rotation can be significantly restricted. Also a redundant constraint is proposed to the guidance module to restrict its rotational motions. The monolithical fabrication of the spatial configuration of the proposed mechanism can be resorted to additive manufactured technology. Numerical simulation results validate the effectiveness of the proposed XY positioning stage.

关键词： Force Actuators Joining processes Numerical simulation Nanopositioning Kinematics Stress

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Stability analysis and PI control synthesis under event-triggered communication

Stability analysis and PI control synthesis under event-trig...

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European control Conference, ECC 2015

作者： Reimann, Sven Van, Duc Hai Al-Areqi, Sanad Liu, Steven Institute of Control Systems Department of Electrical and Computer Engineering University of Kaiserslautern Erwin-Schroedinger-Str. 12 Kaiserslautern67663 Germany

ISBN: (纸本)9783952426937

Although setpoint tracking problems are common in practice, they are still widely unexplored in the event-triggered control framework. Therefore, an event-triggered PI control design strategy with guaranteed performance for networked control systems is proposed in this paper. The integral state of the proposed PI controller is updated at every sampling instant. The update is done by the proposed event generator and sent with new measurements to the PI controller when necessary. Based on a discretized system model and a quadratic cost function, the event-triggered PI control design problem is introduced and formulated as an LMI optimization problem. The effectiveness of the proposed strategy is then experimentally evaluated and compared with other existing strategies in the literature for a case study. © 2015 EUCA.

关键词： Networked control systems

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A Kriging algorithm for location fingerprinting based on received signal strength

A Kriging algorithm for location fingerprinting based on rec...

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Workshop on Sensor Data Fusion: Trends, Solutions, Applications (SDF)

作者： Chao Liu Aroland Kiring Naveed Salman Lyudmila Mihaylova Inaki Esnaola Department of Automatic Control and Systems Engineering University of Sheffield UK

Received signal strength (RSS) based location fingerprinting is a powerful wireless positioning technique. It estimates the target location by consulting a preliminary database and searching for the best matched RSS fingerprints. The construction and maintenance of a sufficient fingerprint database could be laborious and problematic. This paper proposes a new approach that utilizes the Kriging spatial interpolation algorithm to build complete fingerprint databases from sparsely collected measurements. The interpolation performance is analyzed over various extents of sparsity and number of measurements. The constructed fingerprint databases are utilized to locate a static target and the localization performances are analyzed. It is shown that the Kriging algorithm can be used to build RSS fingerprint databases of good accuracy based on sparsely collected measurements.

关键词： Interpolation Loss measurement Mathematical model Spatial databases Computational modeling Wireless communication

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Modeling and torque control for a 4-wheel-drive electric vehicle

Modeling and torque control for a 4-wheel-drive electric veh...

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IEEE International Conference on Industrial Technology (ICIT)

作者： Carlos Montero David Marcos Carlos Bordons Miguel A. Ridao E.F. Camacho Elena González Alejandro Oliva Department of Systems Engineering and Automatic Control University of Seville Spain

ISBN: (纸本)9781479978014

Recent developments in control systems have made it possible to manipulate wheel torques independently in order to improve vehicle handling characteristics of electric vehicles. These vehicles usually employ in-wheel motors which can be independently controlled. This paper presents a 4-wheel-drive electric vehicle for research purposes. A dynamic model based on the connection of the mechanical devices in the vehicle is implemented as a CAD model and as a simulator using Simmechanics in the MATLAB/Simulink framework. This model is validated using data from real experiments and it can be used to test new torque controllers before their implementation. The vehicle has a real-time control system that integrates the torque controller for the 4 motors. This control system fulfils the driver's demand computing the torque that must be supplied by each of the 4 motors. Experimental results are presented, that show that this vehicle seems to be a good test bench that can be used for testing advanced torque distribution controllers.

关键词： Wheels Vehicles Torque Solid modeling Mathematical model Sensors Vehicle dynamics

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Genetic Decision Mechanism for Reasoning and Behaviour Generation in Adaptive Intelligent Agents

Genetic Decision Mechanism for Reasoning and Behaviour Gener...

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IEEE International Conference on Evolving and Adaptive Intelligent systems

作者： Andreea Ion Monica Patrascu Vlad Constantinescu Department of Automatic Control and Systems Engineering University Politehnica of Bucharest

ISBN: (纸本)9781467366991

The intelligent adaptive agent designed in this paper focuses on finding the best configuration of a robot that needs to make a decision in order to fulfil a task, using a genetic algorithm for reasoning and behaviour generation. This intelligent control system can run locally, on the robot's platform, or globally, if the agent is a supervisor that assigns tasks to robots under its control. The robot's configuration contains parameters that define its internal model, first in the decision making process, and then to construct its behaviour. The novelty of this paper consist in the heterogeneous encoding including fuzzy model inside the chromosome and specialized mechanisms for selection, mutation and crossover. An implementation of the algorithm is provided for download.

关键词： Agent Intelligent systems Decision making Genetic algorithms Adaptive systems Behaviour generation Fuzzy model fuzzy modeling Adaptive systems Intelligent systems Genetic Algorithm (GA) Agents Reasoning Intelligent agents Robot Artificial Intelligence decision making Downloading decision making process Supervisors

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A Mobius Transformation for Algebraic Dynamical systems

A Mobius Transformation for Algebraic Dynamical Systems

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International Conference on control systems and Computer Science (CSCS)

作者： Sebastian F. Tudor Cristian Oara Department of Automatic Control and Systems Engineering “Politehnica” University of Bucharest

ISBN: (纸本)9781479917815

A particular Mobius transformation mapping a completely general discrete-time algebraic dynamical system into a standard (proper) continuous-time one is introduced and studied. The freedom in choosing ab ante the exclusion point (in which the transformation is not defined) different from any point of interest makes this transformation a powerful universal tool for solving virtually any optimal/robust control problem for this class of systems by an elegant, yet simple reduction to known results. We show the effectiveness of our approach on two keystone problems: the normalized co prime factorization and the parametrization of all stabilizing controllers.

关键词： Mathematical model Polynomials Eigenvalues and eigenfunctions Standards Linear systems control systems Biological system modeling

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Comprehensive power-supply planning for active distribution system considering cooling,heating and power load balance

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Journal of Modern Power systems and Clean Energy 2015年第4期3卷 485-493页

作者： Xinwei SHEN Yingduo HAN Shouzhen ZHU Jinghong ZHENG Qingsheng LI Jing NONG State Key Lab of Control and Simulation of Power Systems and Generation Equipments Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Grid Planning&Research Center Guizhou Power Grid CooporationCSGGuiyang 550002China

An active distribution system power-supply planning model considering cooling,heating and power load balance is proposed in this paper.A regional energy service company is assumed to be in charge of the investment and operation for the system in the *** expansion of substations,building up distributed combined cooling,heating and power(CCHP),gas heating boiler(GHB)and air conditioner(AC)are included as investment planning *** terms of operation,the load scenarios are divided into heating,cooling and transition ***,the extreme load scene is included to assure the power supply reliability of the *** results demonstrate the effectiveness of the proposed model and illustrate the economic benefits of applying distributed CCHP in regional power supply on investment and operation.

关键词： Active distribution system Combined cooling heating and power(CCHP) Power-supply planning Load balance

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