检索结果-内蒙古大学图书馆

2007 International Conference on Power Electronics and Drive Systems (PEDS 2007), vol.2

作者： P. Somsiri P. Champa P. Wipasuramonton K. Tungpimonrut P. Aree Department or Electrical Engineering Thammasat University Thailland Industrial Control and Automation Lab National Electronics and Computer Technology Center Thailand

This paper presents a simple method to determine the initial rotor position of a three-phase star-connected switched reluctance machine (SRM) at standstill without position and current sensors. The principle of the initial rotor position estimation is based on the stator inductance variation related to the actual rotor position. In the proposed method, only two narrow voltage pulse injections are applied in sequence. In this method the machine parameters and phase current detection are not required. The method is suitable for low-cost SRM-drive applications. The experimental results were carried out on a 6/4 poles three-phase SRM and show the satisfactory accuracy of the proposed initial rotor position estimation.

关键词： Switched reluctance motor Rotor position estimation Standstill

来源：评论

学校读者我要写书评

暂无评论

Sampling Rate Scheduling and Digital Filter Co-design of Networked Supervisory control System

Sampling Rate Scheduling and Digital Filter Co-design of Net...

引用

2007 IEEE International Symposium on Industrial Electronics (ISIE 2007), vol.7

作者： Zheng Li Mo-Yuen Chow Advanced Diagnosis Automation and Control Lab Department of Electrical & Computer Engineering North Carolina State University Raleigh NC USA

A networked supervisory control system is one type of Networked control Systems (NCS) in which a supervisor monitors and analyzes remote plants via communication network. This paper proposes an adaptive multiple sampling rate scheduling (AMSRS) methodology with digital filters in the signal process steps of the control loop to maintain the transmitted measurement signals' fidelity in order to help supervisor's decision making under normal and faulty operating conditions. Specifications of digital filters are chosen according to the system's frequency domain characteristics to bound the signal sampling and reconstruction errors as well as conserve available resource. A networked high throughput screening (HTS) process supervisory control system is used as a case study in this paper to demonstrate the effectiveness of using digital filters in the sampling rate scheduling method. A comparison between using the digital filter and previous zero-order hold approach [1] in signal reconstruction shows that digital filters can further reduce the reconstruction error. Furthermore, the use of filters extensively reduces the amount of consuming bandwidth (resource) in signal sampling and transmission (e.g., 40% and 56% bandwidth saved by two types of digital filters in specific case), and improves the system performance bounded by the limited resources.

关键词： Sampling methods Digital filters Supervisory control Signal sampling Signal processing Bandwidth Networked control systems Communication networks Programmable control Adaptive control

来源：评论

学校读者我要写书评

暂无评论

Polytopic Decomposition of the Linear Parameter-varying Model of the Parallel-type Double inverted Pendulum

Polytopic Decomposition of the Linear Parameter-varying Mode...

引用

IEEE International Conference on Intelligent Engineering Systems (INES)

作者： Szabolcs Nagy Zoltan Petres Peter Baranyi Laszlo Szeidl Pal Michelberger Systems and Control Lab Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Budapest Tech Polytechnical Institution Budapest Hungary Department of Vehicle and Light Weight Structures Analysis Budapest University슠of슠Technology슠and슠Economics Hungary

Most of the formal controller synthesis approaches require conditions like controllability, observability of the systems, however it is still difficult to verify these properties in general. In case of polytopic models these conditions and the feasibility of the linear matrix inequalities (LMI) based design strongly depends on the weighting of the LTI vertex components of the polytopic model. With tensor product (TP) model transformation it is possible to decompose linear parameter-varying (LPV) models into polytopic forms in various ways and also provides the appropriate weighting functions. The objective of this paper is to use this decomposition on the the parallel-type double inverted pendulum control problem.

关键词： Tensile stress Strontium Automatic control control system synthesis Lighting control Linear matrix inequalities Matrix decomposition Concurrent computing automation Electronic mail

来源：评论

学校读者我要写书评

暂无评论

A Simplified Variable Speed Switched Reluctance Motor Drive without Using Encoder

A Simplified Variable Speed Switched Reluctance Motor Drive ...

引用

International Conference on Electrical Machines and Systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： P. Jitkreeyarn K. Tungpimolrut P. Somsiri S. Kachapornkul Akira Chiba Norimasa Tanabe Tadashi Fukao Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

The switched reluctance motor (SRM) and drive system is a candidate in various applications including the home appliance. The simple and low cost system with an adequate performance is also one topic to be developed. A speed sensor directly increases the cost and it directly influences the reliability of the system. This paper proposes a simplified variable speed control system for the SRM without using an encoder. The method is not based on the exact rotor position estimation, only the turn off angle is determined from the simple relation between measured terminal voltage and current. The effectiveness of the proposed method is verified by the experimental result on the 3 kW 3-phase 6-stator-pole and 4-rotor-pole SRM.

关键词： Switched reluctance motor variable speed drive system turn off angle rotor position estimation

来源：评论

学校读者我要写书评

暂无评论

An Algorithm for Extrinsic Parameters Calibration of a Camera and a Laser Range Finder Using Line Features

An Algorithm for Extrinsic Parameters Calibration of a Camer...

引用

2007 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Ganhua Li Yunhui Liu Li Dong Xuanping Cai Dongxiang Zhou National University of Defense Technology Xi'an China Department of Automation and Computer Aided Engineering Chinese University of Hong Kong Hong Kong China Xi''an Satellite Control Center Xi'an China Joint Center for Intelligent Sensing and Systems National University of Defense Technology in Changsha of China Changsha China

This paper presents an effective algorithm for calibrating the extrinsic parameters between a camera and a laser range finder whose trace is invisible. On the basis of an analysis of three possible features, we propose to design a right-angled triangular checkerboard and to employ the invisible intersection points of the laser range finder's slice plane with the edges of the checkerboard to set up the constraints equations. The extrinsic parameters are then calibrated by minimizing the algebraic errors between the measured intersections points and their corresponding projections on the image plane of the camera. We compared our algorithm with the existing methods by both simulations and the real data of a stereo measurement system. The simulation and experimental results confirmed that the proposed algorithm can yield more accurate results.

关键词： Calibration Cameras Robot vision systems Sensor systems Coordinate measuring machines Sensor fusion Equations Algorithm design and analysis Laser fusion Intelligent robots

来源：评论

学校读者我要写书评

暂无评论

A Design of 15 kW Switched Reluctance Motor for Electric Vehicle Applications

A Design of 15 kW Switched Reluctance Motor for Electric Veh...

引用

International Conference on Electrical Machines and Systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： P. Jitkreeyarn K. Tungpimolrut S. Kachapornkul P. Somsiri Tadashi Fukao Akira Chiba Industrial Control and Automation Laboratory Section National Electronics and Computer Technology C Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

In this paper, a design of the 3-phase, 6-stator-pole and 4-rotor-pole, 15 kW switched reluctance motor for the propulsion system of the electric vehicle is presented. Its performance such as the torque per volume and... 详细信息

关键词： Switched reluctance motor motor design electric vehicle

来源：评论

学校读者我要写书评

暂无评论

A Study On Iterative Learning control With Adjustment Of Learning Interval For Monotone Convergence In The Sense Of Sup-Norm

引用

Asian Journal of control 2008年第1期4卷

作者： Kwang-Hyun Park Zeungnam Bien Division of EE Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S. M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.

It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.

关键词： Iterative learning control monotone convergence learning interval sup-norm

来源：评论

学校读者我要写书评

暂无评论

Scheduling a Life Science High-Throughput Platform under Starvation Constraints Using Timed Transition Petri Nets and Heuristic Search

Scheduling a Life Science High-Throughput Platform under Sta...

引用

2007 IEEE International Symposium on Industrial Electronics (ISIE 2007), vol.5

作者： Tao Hong Mo-Yuen Chow Perry Haaland Dylan Wilson Robert Walker Advanced Diagnosis Automation and Control Lab Department of Electrical & Computer Engineering North Carolina State University Raleigh NC USA BD Technologies NC USA

High-Throughput (HT) platforms have been increasingly used in the life science area for diverse bio-chemical experiments. This paper addresses the scheduling of HT platform based experiments under multiple constraints, such as operation constraints, resource constraints and starvation constraints. We use timed transition Petri nets (PN) to model the experimental process with constraints. We first propose the transition variant property of the PN model. We then propose the HCH (Hong-Chow-Haaland) algorithm, which is customized from A{sup}* algorithm, to find a feasible solution. HCH algorithm is more efficient than L1 algorithm and most other A{sup}* extended algorithms in identification of new markings when applied to the transition variant PN. We then applied HCH algorithm to two typical HT processes. The results show that HCH algorithm can be used to find optimal solutions with the time complexity of identifying new markings less than 2% of the L1 algorithm.

关键词： Petri nets Job shop scheduling Scheduling algorithm Humans Processor scheduling automation USA Councils Resource management Mathematical model Chemical compounds

来源：评论

学校读者我要写书评

暂无评论

TRACKING control IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

引用

Asian Journal of control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

来源：评论

学校读者我要写书评

暂无评论

The simulation system for investigation of control methods of autonomous underwater vehicle

The simulation system for investigation of control methods o...

引用

16th International Conference on computer Graphics and Vision, GraphiCon 2006

作者： Bobkov, Valery Borisov, Yuriy Melman, Sergey Ronshin, Yurij Department of Computer Graphics Institute for Automation and Control Processes Russia Institute for Automation and Control Processes Russia

The paper is devoted to creation of the simulation system for investigation of control methods with complex spatial movements of the autonomous underwater vehicle. The principle of a virtual reality and simulation of the basic systems of the vehicle is put in a basis of the system. The structure of the system and the scheme of its operation are described. The use of the optical information for the purposes of navigation was underlined. The model of a virtual optical range finder with use of a vehicle's trajectory correction method and algorithm of restoration of 3D points of the underwater environment are offered. The algorithm provides dense 3D covering with restoration of normal-vectors of surfaces from three consecutive calibrated images. Results of computing experiments for synthetic scenes of different depth are presented. The future works aimed to development of methods and algorithms AUV trajectories planning according to sonar and video data with taking its mission into account.

关键词： Sonar

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：