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检索条件"主题词=Computer algorithms"

共 3297 条记录，以下是1721-1730 订阅

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Closed loop D-Q Control of High-Voltage High-Power Three-Phase Dual Active Bridge Converter in Presence of Real Transformer Parasitic Parameters

Closed loop D-Q Control of High-Voltage High-Power Three-Pha...

引用

IEEE Energy Conversion Congress and Exposition

作者： Awneesh K. Tripathi Krishna Mainali Dhaval Patel Subhashish Bhattacharya Kamalesh Hatua Department of Electrical and Computer Engineering North Carolina State University Raleigh NC 27606 Department of Electrical Engineering IIT Madras Chennai INDIA

ISBN: (纸本)9781479903375

Three-phase Dual Active Bridge (DAB) Y : Y/Δ composite topology offers advantage of nearly sinusoidal converter-currents without pulse-width modulation, which can be utilized for D-Q mode control implementation. D-Q control is smooth and regulates power-factor of DAB which ensures zero voltage switching (ZVS) operation of the DAB converter at wide-range loading conditions. A practical DAB high-frequency transformer has certain limitations like small leakage-inductance, limited magnetizing-inductance and unwanted parasitic-capacitance's which distort the primary-side currents at the rated high-voltage because primary inter-turn capacitance is high in per-unit for a real 100kW transformer-design. This problem can be solved by using secondary currents and estimated magnetizing current to emulate primary-currents for D-Q control. Parasitic are introduced in the LV TIPS set-up by adding lumped elements to emulate real HV-transformer with objective to test the controls in worst case scenario. This paper proposes the solutions for some of the practical implementation problems of the control algorithm for the DAB.

关键词： Parasites computer algorithms High Voltage Converters Q-control Real number

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Multi-Agent Testbed for Emerging Power Systems

Multi-Agent Testbed for Emerging Power Systems

引用

IEEE Power and Energy Society General Meeting

作者： Mark J. Stanovich Sanjeev K. Srivastava David A. Cartes Troy L. Bevis Center for Advanced Power Systems Florida State University Tallahassee FL USA

ISBN: (纸本)9781479913022

Controls in power systems such as national utility grids, microgrids, and shipboard electrical infrastructures are evolving and conventional testbeds are inadequately outfitted for effective design, development, and testing. In particular, conventional power system control testbeds typically lack appropriate computational and data communication tools to quickly and accurately represent advanced control architectures. In this paper, we discuss experiences with a distributed control testbed by incorporating general purpose computational platforms and a more extensive data communications infrastructure. These components enhance the testbed by providing access to key technologies expected to be prevalent in emerging power systems and also simplify the implementation of sophisticated control architectures. Evaluation of the improved capabilities of the testbed is provided through two studies. The first explores the control capabilities for a shipboard power system through the use of hierarchical and distributed control structures. The second investigates the effect of data communication latencies on a control algorithm through a test case involving synchronization of multiple generators.

关键词： multi-agent distributed control testbed decentralised control power systems data communication CASING INSPECTION computer algorithms Key technology

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Modular architecture of the multi-robot system for teleoperation and formation control purposes

Modular architecture of the multi-robot system for teleopera...

引用

Workshop on Robot Motion and Control

作者： Krzysztof Kozlowski Wojciech Kowalczyk Bartlomiej Krysiak Marcin Kielczewski Tomasz Jedwabny Control and Systems Engineering Faculty of Computing Poznan University of Technology

ISBN: (纸本)9781467355094

In this paper architecture of the control system for the multiple mobile robots is presented. It was designed for teleoperation and multiagent algorithm tests. Subsystems are connected with wired or wireless links depending on their mobility and distance. The modules, their software and hardware interfaces were designed to make the system easily modifiable as different algorithms require less or more sensors, interaction, communication and computing power. The goal was to design a system on which a large number of control algorithms can run.

关键词： remote operation computer algorithms control systems ARCHITECTURE Building construction SUB-SYSTEM multi-robot systems Mobile robots Modularity Robot System computational power

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PMSM for high demands on low torque ripple using optimized stator phase currents controlled by an iterative learning control algorithm

PMSM for high demands on low torque ripple using optimized s...

引用

Annual Conference of the IEEE Industrial Electronics Society

作者： G. Bramerdorfer W. Amrhein S. Lanser Institute for Electrical Drives and Power Electronics Johannes Kepler University

ISBN: (纸本)9781479902255

Brushless permanent magnet machines (BPMMs) gained more importance due to the high power density ensured by permanent magnets with high energy densities. Therefore, a more compact design can be achieved compared to other types of electrical machines. However, the ferromagnetic components are typically driven near or above the saturation flux density at least at nominal load operation. This leads to non-sinusoidal linked fluxes in the stator coils and, hence, creates disruptive torque ripple during operation when the motor is fed with sinusoidal currents. Additionally, BPMMs often show a considerable cogging torque and, hence, torque ripple can even be noticed at no-load operation. In this article, a motor design with a certain number of significant flux harmonics is presented. Non-sinusoidal current waveforms were optimized in order to fulfill the operating performance requirements of the electric drive regarding efficiency and torque ripple. For impressing the desired current waveforms including higher harmonics related to the electrical frequency of the motor, the specification of the used power electronics has to be taken into account. Furthermore, the structure and design of the current control has a big impact on the possibility to impress specific current waveforms even at higher rotor speeds. This article is about a current control structure using an iterative learning control algorithm (ilc). In the introduction, different current control strategies are given that were published in the past. This will be followed by the presentation of the considered motor design. The control structure and the hardware used for experimental results are subsequently described. This will be followed by measurement results of the achieved currents and load torques and finally a conclusion is derived.

关键词： Brushless permanent magnet machines Iterative learning control Flux harmonic Current harmonic Torque ripple Cogging torque Current control torque ripple Current control cogging torque Control Architecture Permanent magnet synchronous machines Phase current stator coils saturation flux density Iterative learning control ELECTRIC MACHINES(BY DESIGN) Power electronics computer algorithms

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Hybrid Control of the Boost Converter: Robust Global Stabilization

Hybrid Control of the Boost Converter: Robust Global Stabili...

引用

IEEE Annual Conference on Decision and Control

作者： Thomas A.F. Theunisse Jun Chai Ricardo G. Sanfelice W.P. Maurice H. Heemels Department of Mechanical Engineering Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands Department of Aerospace and Mechanical Engineering University of Arizona 1130 N. Mountain Ave AZ 85721

ISBN: (纸本)9781467357159

In this paper we consider the modeling and (robust) control of a DC-DC boost converter. In particular, we derive a mathematical model consisting of a constrained switched differential inclusion that includes all possible modes of operation of the converter. The obtained model is carefully selected to be amenable for the study of various important robustness properties. By exploiting this model we design a control algorithm that induces robust, global asymptotic stability of a desired output voltage value. The guaranteed robustness properties ensure proper operation of the converter in the presence of spatial regularization to reduce the high rate of switching. The establishment of these properties is enabled by recent tools for the study of robust stability in hybrid systems. Simulations illustrating the main results are included.

关键词： boost converters hybrid control Converters computer algorithms normal operation Robust stability Robust control Robustness

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Optimization of Driving Based on Currently Measured Data

Optimization of Driving Based on Currently Measured Data

引用

International IEEE Conference on Intelligent Transportation Systems

作者： Ivan Nagy Evgenia Suzdaleva Tereza Mlynarova Faculty of Transportation Sciences Czech Technical University Department of Adaptive Systems Institute of Information Theory and Automation of the ASCR

ISBN: (纸本)9781479929153

The paper deals with fuel consumption optimization under condition of keeping the recommended speed. The presented approach is based on data currently measured on a driven vehicle and on external observations. Using adaptive optimal control algorithms under Bayesian methodology, a compromise between fuel consumption minimization and keeping the recommended speed is reached. Research is performed in collaboration with Skoda Auto ().

关键词： Automobile driving Fuel consumption motivation adaptive optimal control observational data vehicle computer algorithms

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A Greedy Policy for Fleet-Level Radar Resource Management

A Greedy Policy for Fleet-Level Radar Resource Management

引用

IEEE Annual Conference on Decision and Control

作者： Jinxin Zhao Jinwoo Seok Jhanani Selvakumar Ricardo Bencatel Pierre Kabamba Anouck Girard Department of Aerospace Engineering University of Michigan Ann Arbor Michigan 48109-2140

ISBN: (纸本)9781467357159

A model for a phased-array radar in the context of a defensive Naval system has been developed using hierarchical finite state machines. This model is used to study resource management for a fleet of ships equipped with one radar unit each. This fleet is under attack from aerial enemy agents. A control algorithm formulated on this specific model is used to dynamically generate a greedy policy for radar operation. The defense system is evaluated in its capability to acquire and track those aerial threats, in two configurations -centralized and decentralized (independent). The performance is quantified on the basis of time taken to establish the threat trajectory, time to compute the policy and the number of threats the system fails to track. A comparison of performance in the two configurations is provided.

关键词： management of resources radar phased array radar Policies greedy method Defense systems Ships computer algorithms array radar Fleet time bases

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FVMS: A Novel SiL Approach on the Evaluation of Controllers for Autonomous MAV

FVMS: A Novel SiL Approach on the Evaluation of Controllers ...

引用

IEEE Aerospace Conference

作者： Rafael C. B. Sampaio Marcelo Becker Adriano A. G. Siqueira Leonardo W. Freschi Marcelo P. Montanher University of S?o Paulo - EESC - Mechatronics Group - Mobile Robotics - Aerial Robots Team (ART) S?o Carlos/SP Brazil -13566-590

ISBN: (纸本)9781467318129

The originality of this work is to propose a novel SiL (Software-in-the-Loop) platform using Microsoft Flight Simulator (MSFS) to assist control design regarding the stabilization problem found in AscTec Pelican platform. Aerial Robots Team (USP/EESC/LabRoM/ART) has developed a custom C++/C# software named FVMS (Flight Variables Management System) that interfaces the communication between the virtual Pelican and the control algorithms allowing the control designer to perform fast full closed loop real time algorithms. Emulation of embedded sensors as well as the possibility to integrate OpenCV Optical Flow algorithms to a virtual downward camera makes the SiL even more reliable. More than a strictly numeric analysis, the proposed SiL platform offers an unique experience, simultaneously offering both dynamic and graphical responses. Performance of SiL algorithms is presented and discussed.

关键词： MSFS Software-in-the-Loop MAV KLHL2 gene Controllers computer algorithms Embedded sensor Creativity pelicans

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Mathematical Description of AC Resistance Spot Welding Control Problem and Limits of its Controller Design

Mathematical Description of AC Resistance Spot Welding Contr...

引用

American Control Conference

作者： Zuogong Yue Kang Zhou Lilong Cai Department of Mechanical Engineering The Hong Kong University of Science and Technology Hong Kong S.A.R. China

ISBN: (纸本)9781479901777

Resistance spot welding (RSW) is widely used in sheet metal fabrication industries even though the medium frequency type has appeared. Since there are lots of demands to significantly improve its performances depending on better control schemes, it is valuable to answer the question: how much of the performance it might improve if more advanced control strategies could be used. In addition, various modeling work has been done in the past twenty years. However, there are few new papers showing controller design based on these models and improving its performances effectively. This paper presented the complete mathematical description of the control problem firstly and revealed the critical points in the model of the whole process which significantly affect the control strategy design. Then it explained why most feedback strategies ordinarily used lose their theoretical foundations and few existing control algorithms can be directly used for this control problem with RMS valued current as the output and input constraints. Moreover, a practical control strategy with solid theoretical support was proposed, which seems to be simple but actually with lots of complicated theoretical issues concerned and is one of the few reasonable control algorithms considering the unique properties of RSW's "single phase AC model, input constraints and nonlinearity of the output". In the end, this paper verified the proposed scheme against the experimental results, and introduced a new interesting general control problem for later researches.

关键词： Controller Design RSW medium frequency type controller design control strategy computer algorithms AC resistance Spot welding

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Optimal Control for a Polynomial System with a Quadratic Criterion over Infinite Horizon

Optimal Control for a Polynomial System with a Quadratic Cri...

引用

American Control Conference

作者： Michael Basin Manuel Jimenez-Lizarraga Pablo Rodriguez-Ramirez Celeste Rodriguez-Carreon Department of Physical and Mathematical Sciences Autonomous University of Nuevo Leon San Nicolas de los Garza Nuevo Leon Mexico

ISBN: (纸本)9781479901777

This paper proposes an optimal control algorithm for a polynomial system with a quadratic criterion over infinite horizon. The designed regulator gives a closed form solution to the infinite horizon optimal control problem for a polynomial system with a quadratic criterion. The obtained solution consists in a feedback control law obtained by solving a Riccati algebraic equation dependent on the state. Numerical simulations in the example show advantages of the developed algorithm.

关键词： Quadratic Criterion over Infinite Horizon quadratic criterion developed algorithm infinite horizon Optimal control Quadratic Polynomial Closed-form solutions computer algorithms control law

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