检索结果-内蒙古大学图书馆

Universite Libre de Bruxelles

作者： Chen, Tianshi Zhao, Yanlong Ljung, Lennart Division of Automatic Control Department of Electrical Engineering Linköping University Linköping Sweden Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and System Science Chinese Academy of Sciences Beijing China

ISBN: (纸本)9783902823069

FIR (finite impulse response) model is widely used in tackling the problem of the impulse response estimation with quantized measurements. Its use is, however, limited, in the case when a high order FIR model is required to capture a slowly decaying impulse response. This is because the high variance for high order FIR models would override the low bias and thus lead to large MSE (mean square error). In this contribution, we apply the recently introduced regularized FIR model approach to the problem of the impulse response estimation with binary measurements. We show by Monte Carlo simulations that the proposed approach can yield both better accuracy and better robustness than a recently introduced FIR model based approach. © 2012 IFAC.

关键词： Impulse response

来源：评论

学校读者我要写书评

暂无评论

Optimal allocation of distributed generators in a distribution network using adaptive multi-objective particle swarm optimization

Optimal allocation of distributed generators in a distributi...

引用

2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： Cheng, Shan Chen, Min-You Fleming, Peter J. Li, Xia State Key Laboratory of Power Transmission Equipment and System Security and New Technology School of Electrical Engineering Chongqing University Chongqing China Department of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781447124665

This study presents the optimal allocation of distributed generators (DGs) in distribution network based on an adaptive multi-objective particle swarm optimization (AMPSO). In order to enable the DGs to make the best contribution to the distribution network, a multi-objective optimization model addressing power loss and a voltage stability index (VSI) is constructed, in which the capacity factor of DGs is taken into consideration. In the AMPSO, some adaptive techniques including the use of dynamically changing inertia weight, time-varying acceleration coefficients, mutation operation and circular crowding sorting have been integrated to improve the convergence and the diversity performance of the algorithm. The proposed algorithm has been used to determine the optimal allocation of DGs in a IEEE 33-bus distribution network. Simulation results show that the proposed method can identify the optimal solutions with a good tradeoff between the power loss and the VSI. © 2012 Springer-Verlag London Limited.

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

control of Solar Energy systems 1

引用

IFAC Proceedings Volumes 2012年第15期45卷 848-855页

作者： Eduardo F. Camacho Manuel Berenguel Department of System Engineering and Automatic Control of the Escuela Superior de Ingenieros of the University of Sevilla Spain Department of Languages and Computation of the University of Almeria Spain

This work deals with the main control problems found in solar power systems and the solutions proposed in literature. The paper first describes the main solar power technologies, its development status and then describes the main challenges encountered when controlling solar power systems. While in other power generating processes, the main source of energy can be manipulated, in solar energy systems, the main source of power which is solar radiation cannot be manipulated and furthermore it changes in a seasonal and on a daily base acting as a disturbance when considering it from a control point of view. Solar plants have all the characteristics needed for using industrial electronics and advanced control strategies able to cope with changing dynamics, nonlinearities and uncertainties.

关键词： control of solar energy systems model predictive control control of thermo solar plants control of parabolic troughs

来源：评论

学校读者我要写书评

暂无评论

Supervised multi-agent control of leather manufacturing processes by using the fuzzy logic

Leather and Footwear Journal

引用

Leather and Footwear Journal 2012年第2期12卷 101-112页

作者： Hanchevici, Arian-Bogdan Guta, Sergiu-Adrian Faculty of Automatic Control and Computers Department of Automatic Control and System Engineering Politehnica University of Bucharest Romania INCDTP Division: Leather and Footwear Research Institute 93 Ion Minulescu Bucharest Romania

In this paper we propose a supervised multi-agent control strategy for leather manufacturing processes. In a tannery numerous processes are performed and in order to control them we use an agent for each process. Due to the control from distance, the systems are affected by varying communication delays which can affect the quality of the final product. The supervisor is used to adjust, by using the fuzzy logic, the command provided by each agent. Simulation results are presented. The results show performance improvement when our control strategy is used.

关键词： Fuzzy logic

来源：评论

学校读者我要写书评

暂无评论

Lithium-ion battery remaining useful life estimation based on nonlinear AR model combined with degradation feature

Lithium-ion battery remaining useful life estimation based o...

引用

2012 Annual Conference of the Prognostics and Health Management Society, PHM 2012

作者： Liu, Datong Luo, Yue Peng, Yu Peng, Xiyuan Pecht, Michael Department of Automatic Test and Control Harbin Institute of Technology Harbin Beijing150080 China System Design Institute of Electro-Mechanic Engineering Beijing100854 China CALCE University of Maryland College ParkMD20742 United States

ISBN: (纸本)9781936263059

Long term prediction such as multi-step time series prediction is a challenging prognostics problem. This paper proposes an improved AR time series model called ND-AR model (Nonlinear Degradation AutoRegression) for Remaining Useful Life (RUL) estimation of lithium-ion batteries. The nonlinear degradation feature of the lithiumion battery capacity degradation is analyzed and then the non-linear accelerated degradation factor is extracted to improve the linear AR model. In this model, the nonlinear degradation factor can be obtained with curve fitting, and then the ND-AR model can be applied as an adaptive datadriven prognostics method to monitor degradation time series data. Experimental results with CALCE battery data set show that the proposed nonlinear degradation AR model can realize satisfied prognostics for various lithium-ion batteries with low computing complexity.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Robust vector control strategy for variable speed wind turbines

引用

International Journal of Power Electronics 2012年第4期4卷 321-339页

作者： Barambones, Oscar Automatic Control and System Engineering Department University of the Basque Country EUI de Vitoria Nieves cano 12 1006 Vitoria Spain

The efficiency of the wind power conversions systems can be greatly improved using an appropriate control algorithm. In this work, a robust control for variable speed wind power generation that incorporates a doubly feed induction generator is described. The electrical systems incorporate a wound rotor induction machine with back-to-back three phase power converter bridges between its rotor and the grid. In the presented design, it is applied the so called vector control theory. The proposed control scheme uses stator flux-oriented vector control for the rotor-side converter bridge control and grid voltage vector control for the grid-side converter bridge control. The proposed robust control law is based on a sliding mode control theory that, as it is well-known, presents a good performance under system uncertainties. The stability analysis of the proposed controller under disturbances and parameter uncertainties is provided using the Lyapunov stability theory. Finally, simulated results show, on the one hand, that the proposed controller provides high-performance dynamic characteristics, and on the other hand, that this scheme is robust with respect to the uncertainties that usually appear in the real systems. Copyright © 2012 Inderscience Enterprises Ltd.

关键词： Wind power

来源：评论

学校读者我要写书评

暂无评论

Reference governor design with guarantees of detection for delay variation

Reference governor design with guarantees of detection for d...

引用

10th IFAC Workshop on Time Delay systems, TDS-2012

作者： Stanković, Nikola Stoican, Florin Olaru, Sorin Niculescu, Silviu-Iulian SUPELEC System Sciences E3S - Automatic Control Department Gif-sur-Yvette France Norwegian University of Science and Technology Department of Engineering Cybernetics Trondheim Norway SUPELEC CNRS LSS - Laboratory of Signals and Systems Gif-sur-Yvette France

ISBN: (纸本)9783902823045

The present paper deals with fault tolerant control for linear dynamics with additive disturbances. The control action is generated based on information collected from a redundant, multi-sensors network. Delays that may appear during plant measurements transmission through real communication channels are considered as faults. Depending on presence of delay in feedback loop, different invariant sets can be computed. We show that fault tolerant control can be achieved through invariant sets separation with respect to different delay values. Sets separation is accomplished for specific values of the reference signal. Therefore, we introduce in the loop a reference governor which is designed by a receding horizon technique. Thus, we provide reference signals which practically guarantee fault detection and identification in real time. © 2012 IFAC.

关键词： Fault tolerance

来源：评论

学校读者我要写书评

暂无评论

Some aspects of the modular walking robot MERO's new architecture

引用

IFAC Proceedings Volumes 2012年第6期45卷 900-905页

作者： Ion Ion Simionescu Ion Curaj Adrian Aurelian Vasile Dinu Cornel Manufacturing Technology Department POLITEHNICA University of Bucharest Romania Mechanism and Robot Theory Department POLITEHNICA University of Bucharest Automatic Control and System Engineering Department POLITEHNICA University of Bucharest Romania

The new modular walking robots MERO by reconfiguring their architecture are built to displace the heavy loads on the unaligned terrain. The main characteristic of the modular walking robots is that they are able to move away on unarranged, horizontal and rough terrain The modular walking system protects much better the environment when its contact with the soil is discrete, a fact that limits appreciately the area that is crushed. The new modular walking robots may have a lower or higher autonomy degree. This autonomy has in view the power source's supply capability but also orientation and perception capabilities as regards the terrain configuration the robot is running upon and its decision making and the motion manner towards a target. Architecture of the reference structure of the walking robot has three two-legged modules. Every leg has three degrees of freedom (RRP), a slip sensor and tactile sensor to measure the contact which consists of lower and upper levels. The body of the MERO (MEchanism RObot) walking robot carries a gyroscopic bearing sensor to measure the pitch and roll angles of the platform. The legs are powered by hydraulic drives and are equipped with transducers and sensors. They are used to control the walking robot in the adaptability to a natural ground. In this paper presents some aspects of the new modular walking robot

关键词： autonomous mobile robot walking robot mechanism gait stability level control

来源：评论

学校读者我要写书评

暂无评论

A case study of a flexible software tool in the drilling process

引用

IFAC Proceedings Volumes 2012年第4期45卷 333-338页

作者： E. Portillo I. Cabanes J.A. Sánchez D. Orive N. Ortega M. Marcos Department of Automatic Control and System Engineering University of the Basque Country Alameda Urquijo s/n 48013 Bilbao Spain (Tel: +34 94 6013952) Department of Automatic Control and System Engineering University of the Basque Country Alameda Urquijo s/n 48013 Bilbao Spain (Tel: +34 94 6013951) Department of Mechanical Engineering University of the Basque Country Alameda Urquijo s/n 48013 Bilbao Spain (Tel: +34 94 6014089) Department of Automatic Control and System Engineering University of the Basque Country Alameda Urquijo s/n 48013 Bilbao Spain (Tel: +34 94 6014212) Department of Mechanical Engineering University of the Basque Country Alameda Urquijo s/n 48013Bilbao Spain (Tel: +34 94 6013929) Department of Automatic Control and System Engineering University of the Basque Country Alameda Urquijo s/n 48013 Bilbao Spain (Tel: +34 94 6014049)

The drilling process is one of the most extended machining processes in the manufacturing industry. However, the performance of this process can be importantly decreased due to the drill wear and even breakage. Concerning this, this paper presents a flexible software tool that provides the user of the drilling machine with information about the current regime of the drilling process. In particular, the application provides information related to the occurrence of both tool wear and material heterogeneities.

关键词： Flexible software tool Industrial application drilling tool wear Labview™

来源：评论

学校读者我要写书评

暂无评论

Voltage quality improvement in islanded microgrids supplying nonlinear loads

Voltage quality improvement in islanded microgrids supplying...

引用

2012 3rd Power Electronics, Drive systems and Technologies Conference, PEDSTC 2012

作者： Dehghani, Mohammad T. Vahedi, Abolfazl Savaghebi, Mehdi Guerrero, Josep M. Department of Power Engineering Saveh Branch Islamic Azad University Saveh Iran Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Iran Department of Electronics Engineering Karaj Branch Islamic Azad University Karaj Iran Department of Automatic Control and Industrial Informatics Technical University of Catalonia Spain Institute of Energy Technology Aalborg University Denmark

ISBN: (纸本)9781467301114

The aim of this paper is to improve voltage quality at the terminals of distributed generators (DGs) in an islanded microgrid. To achieve this goal, it is proposed to include separate voltage and current control loops for the fundamental and harmonics frequencies. This way, it is not necessary to consider additional controllers to provide voltage harmonic compensation. The proposed control system can be implemented in a very simple way. The control structure of every single DG unit consists of active and reactive power droop controllers and voltage and current control loops. Simulation results are provided in order to show the effectiveness of the proposed control approach. © 2012 IEEE.

关键词： Harmonic analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：