检索结果-内蒙古大学图书馆

International Students Conference on Electrodynamics and Mechatronics (SCE III)

作者： P. Mynarek M. Kowol Automatic Control and Computer Science Department of Electrical Engineering Opole University of Technology Opole Poland Department of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland

The article presents thermal analysis of three-phase induction motor using coupled circuit models. The MATLAB/SIMULINK environment and PLECS toolbox were used to create mathematical model of the examined motor. Coefficient of heat transfer through the winding was set experimentally. Results of calculations presented are verified by the measurements on the physical motor.

关键词： Induction motors Temperature measurement Mathematical model Windings Stator windings Heat transfer

来源：评论

学校读者我要写书评

暂无评论

Mobile Robot Self Localization and 3D Map Building using a 3D PMD-Camera for tele-robotic applications

引用

IFAC Proceedings Volumes 2011年第1期44卷 6851-6856页

作者： Jens Bernshausen Chanin Joochim Hubert Roth Institute of Automatic Control Engineering Department of Electrical Engineering and Computer Science. Hoelderlinstr. 3 57068 University of Siegen Germany

Abstract This work purposes using a 3D PMD camera as a sensor for mobile robot applications. The use of image sensors for environment detection is substantial and common usage in mobile robot exploration. Laser scanners, 3D stereo vision or a combination of them are be used generally. The PMD camera is a novel 3D measuring system, which is based on a time-of-flight principle. The main feature is an array sensor, which can measure the distance to the target without scanning. This relatively new technology offers a cost-effective alternative to the mentioned sensors. In the following we present methods for self-localization and 3D map building by remote sensor data acquisition. This allows the teleoperative control of a mobile robot in an unknown environment. To enhance the mobile robot tasks, a CCD and the PMD camera are registered in order to create the three dimensional mapping. The CCD texture data will be overlaid with the PMD depth data to increase the accuracy of the lateral resolution. The visual input from the CCD camera not only delivers high resolution texture data, it can also apply for object recognition in clutter environment.

关键词： PMD camera sensor and data fusion remote sensor data acquisition mobile robots telerobotics self localization 3D map building

来源：评论

学校读者我要写书评

暂无评论

A motion-information-based vision-tracking system with a stereo camera on mobile robots

A motion-information-based vision-tracking system with a ste...

引用

2011 IEEE 5th International Conference on Robotics, Automation and Mechatronics, RAM 2011

作者： Bahn, Wook Park, Jaehong Lee, Chang-Hun Kim, Tae-Il Lee, Teajae Shaikh, Muhammad Muneeb Kim, Kwang-Soo Cho, Dong-Il School of Electrical Engineering and Computer Science Seoul National University Kwanak-ku Seoul 151-742 Korea Republic of Department of Control and Instrumentation Engineering Hanbat National University Yuseong-gu Deajeon 305-719 Korea Republic of

ISBN: (纸本)9781612842509

This paper presents a vision-tracking system for a mobile robot, using robot motion and stereo vision data. The mobile robot has an actuator module which pans and tilts an integrated stereo camera. The proposed system controls the actuator to maintain the line of sight of the stereo camera towards a stationary target by using the robot motion data. The robot motion data are obtained from a gyroscope and encoders of the mobile robot. The stereo vision data from the camera is used to compensate for errors in the motion measurements, and to prevent a long term error accumulation. This vision-based compensation is used only when the robot stops or moves slowly, because the long vision processing times can cause the loop time to overrun. The proposed system is experimentally evaluated while the robot moves on a trajectory. © 2011 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

A linked data-driven solution to user modeling in a multi-application environment

A linked data-driven solution to user modeling in a multi-ap...

引用

2011 IEEE 2nd International Conference on Software engineering and Service science, ICSESS 2011

作者： Ye, Na Zhao, Yinliang Zhao, Xia Liu, Enjie Clapworthy, Gordon School of Electronic and Information Engineering Xi'an Jiao Tong University Xi'an China School of Information and Control Engineering Xi'an University of Architecture and Technology Xi'an China Department of Computer Science and Technology University of Bedfordshire Luton United Kingdom

ISBN: (纸本)9781424496969

The User Model plays a significant role in many personalized applications. Separated user modeling results in the fragments of the user model being distributed on the Web, but user modeling in a Multi-Application Environment (MAE) is increasingly required to provide a more complete user model view and more value-added user information to all relevant applications. In this paper, a Linked Data-driven user modeling approach is proposed to create links among the user model fragments of the same user who registers in different applications and, from these, construct a virtually global user model. Through these links, user information in one application can be acquired by another. An extendible Core User Model (CUM) is presented and used to describe both the common properties and the domain-specific features of the user. The advantages and disadvantages of this approach are analyzed by comparison with other user modeling methods in MAEs. The proposed solution appears to be more feasible and to offer increased flexibility. © 2011 IEEE.

关键词： Linked data

来源：评论

学校读者我要写书评

暂无评论

Vision system for mobile robots for tracking moving targets, based on robot motion and stereo vision information

Vision system for mobile robots for tracking moving targets,...

引用

2011 IEEE/SICE International Symposium on System Integration, SII 2011

作者： Kim, Tae-Il Bahn, Wook Lee, Changhun Lee, Tae-Jae Shaikh, Muhammad Muneeb Kim, Kwang-Soo School of Electrical Engineering and Computer Science Seoul National University Kwanak-ku Seoul 151-742 Korea Republic of Department of Control and Instrumentation Engineering Hanbat National University Yuseong-gu Deajeon 305-719 Korea Republic of

ISBN: (纸本)9781457715235

This paper presents a vision-tracking for mobile robots, which tracks a moving target based on robot motion and stereo vision information. The proposed system controls pan and tilt actuators attached to a stereo camera, using the data from a gyroscope, robot wheel encoders, pan and tilt actuator encoders, and the stereo camera. Using this proposed system, the stereo camera always faces the moving target. The developed system calculates the angles of the pan and tilt actuators by estimating the relative position of the target with respect to the position of the robot. The developed system estimates the target position using the robot motion information and the stereo vision information. The movement of the robot is modeled as the transformation of the frame, which consists of a rotation and a translation. The developed system calculates the rotation using 3-axis gyroscope data and the translation using robot wheel encoder data. The proposed system measures the position of the target relative to the robot, combining the encoder data of pan and tilt actuators and the disparity map of the stereo vision. The inevitable mismatch of the data, which occurs from the asynchrony of the multiple sensors, is prevented by the proposed system, which compensates for the communication latency and the computation time. The experimental results show that the developed system achieves excellent tracking performance in several motion scenarios, including combinations of straights and curves and climbing of slopes. © 2011 IEEE.

关键词： Stereo vision

来源：评论

学校读者我要写书评

暂无评论

Challenge to introduce MBSA approaches into CBTC safety analysis

Challenge to introduce MBSA approaches into CBTC safety anal...

引用

2011 IEEE International Conference on Service Operations, Logistics and Informatics, SOLI 2011

作者： Liu, Chao Tang, Tao Lisagor, Oleg State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China High Integrity Systems Engineering Group Department of Computer Science University of York York United Kingdom

ISBN: (纸本)9781457705731

Along with technology progress and fast paced development in China railway, the issue of safety is increasingly significant for all the involved technical equipments, especially for train control system. However, in view of the typical features of software-intensive, hardware-distributed, and communication- dependent derived from Communication based Train control System (CBTC) 1, traditional safety analysis approaches gradually betray the deficiencies of loose consistency of safety and design processes and duplicate work on safety assessment. In this paper, two of prominent proposed model based safety analysis (MBSA) approaches: failure logic modeling and failure effect modeling are introduced to deal with these two industrially encountered challenges, and also a further feasibility study on system-component extraction and model boundary restriction is investigated via a lightweight CBTC case, to show key technical issues on deploying MBSA methodology into railway-specific safety critical system. © 2011 IEEE.

关键词： computer circuits

来源：评论

学校读者我要写书评

暂无评论

A Radial Basis Function Spike Model for Indirect Learning via Integrate-and-Fire Sampling and Reconstruction Techniques

引用

Advances in Artificial Neural Systems 2012年第1期2012卷

作者： X. Zhang G. Foderaro C. Henriquez A. M. J. VanDongen S. Ferrari Laboratory for Intelligent Systems and Control (LISC) Department of Mechanical Engineering and Materials Science Duke University Durham NC 27708 USAduke.edu Department of Biomedical Engineering and Department of Computer Science Duke University Durham NC 27708 USAduke.edu Program in Neuroscience & Behavioral Disorders Duke-NUS Graduate Medical School Singapore Singapore

This paper presents a deterministic and adaptive spike model derived from radial basis functions and a leaky integrate-and-fire sampler developed for training spiking neural networks without direct weight manipulation. Several algorithms have been proposed for training spiking neural networks through biologically-plausible learning mechanisms, such as spike-timing-dependent synaptic plasticity and Hebbian plasticity. These algorithms typically rely on the ability to update the synaptic strengths, or weights, directly, through a weight update rule in which the weight increment can be decided and implemented based on the training equations. However, in several potential applications of adaptive spiking neural networks, including neuroprosthetic devices and CMOS/memristor nanoscale neuromorphic chips, the weights cannot be manipulated directly and, instead, tend to change over time by virtue of the pre- and postsynaptic neural activity. This paper presents an indirect learning method that induces changes in the synaptic weights by modulating spike-timing-dependent plasticity by means of controlled input spike trains. In place of the weights, the algorithm manipulates the input spike trains used to stimulate the input neurons by determining a sequence of spike timings that minimize a desired objective function and, indirectly, induce the desired synaptic plasticity in the network.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Advanced control technique application in U-tube steam generator of nuclear power station

Advanced control technique application in U-tube steam gener...

引用

2011 International Conference on computer engineering and Systems, ICCES'2011

作者： Mousa, Hamdi M. El-Araby, Sayed M. Koutb, Magdy A. Ali, Elsayed H. M. Menoufia University Faculty of Computers and Information Department of Computer Science Shbien Elkoom Egypt Egyptian Atomic Energy Authority Nuclear Research Center Department of Engineering and Scientific Instruments Cairo Egypt Menoufia University Faculty of Electronic Engineering Department of Industrial Electronics and Control Menouf Egypt

ISBN: (纸本)9781457701283

A water level control system for a nuclear steam generator (SG) is proposed. A method to improve the performance of nuclear steam generator in nuclear power station is introduced. Combination of genetic algorithm (GA) technique and fuzzy logic control is carried out. The optimal parameters of fuzzy logic controller are achieved. These parameters include;the membership functions of water level error and changes water level error, the rule base, and the input scaling gains. Steam generator model is implemented using MATLAB/SIMULINK. The optimal controller was applied to control the water level of nuclear SG and it's compared with conventional controller. Simulation results indicate that the optimal fuzzy controller greatly improves the performance of nuclear SG. Moreover the proposed controller is robust to any disturbance related to sudden changes in steam flow rate and water level. Moreover the proposed controller is robust to any disturbance related to load variations. © 2011 IEEE.

关键词： Water levels

来源：评论

学校读者我要写书评

暂无评论

Improved servomechanism control design - Nonswitching case

Improved servomechanism control design - Nonswitching case

引用

作者： Salton, Aurélio T. Chen, Zhiyong Fu, Minyue School of Electrical Engineering and Computer Science University of Newcastle Australia Pontifícia Universidade Católica Do Rio Grande Do sul Brazil State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology China Department of Control Science and Engineering Zhejiang University China

ISBN: (纸本)9783902661937

This paper attempts to achieve time-optimal performance for servomechanisms via a practical feedback control law. An improvement over the traditional Proximate Time Optimal Servomechanism (PTOS) is proposed in order to eliminate the conservatism present in the controller. The original PTOS switches from the nonlinear approximation of Time Optimal control (TOC) to a linear controller as the system approaches the reference point. This switching results in a compromise in performance inasmuch as the linear controller is not sufficiently aggressive to settle the system output with acceptable levels of overshoot. The proposed controller eliminates the necessity of the switching function by making use of an elaborate nonlinear control law. Simulations and experimental results show that the proposed design achieves levels of performance comparable to that of the theoretical TOC. © 2011 IFAC.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Visual SLAM with oriented landmarks and partial odometry

Visual SLAM with oriented landmarks and partial odometry

引用

International Conference on Electronics, Communications and computers (CONIELECOMP)

作者： E. Hernández J.M. Ibarra J. Neira R. Cisneros J. E. Lavín Department of Automatic Control CINVESTAV-IPN Department of Computer Science and Systems Engineering University of Zaragoza

In this paper, we describe a system that can carry out visual simultaneous localization and mapping (VSLAM) in structured indoor environments; this system uses a small-sized low-cost commercial humanoid robot which uses a camera mounted on a pan-and-tilt device (it was designed and built by us) as his head. Almost all of the VSLAM approaches use points 2D like features of the robot's environment for estimate his pose and the structure of his environment. We propose a new approach to get points 3D (i.e. feature's position and orientation with respect to the current robot's position are known) this approach is based in a monocular 3D reconstruction scheme; with this information we can improve the results in classical SLAM EKF method. Experiments had made in a structured environment, we implemented them for two cases, though; the first one was implemented without odometry and second one was carried out with partial odometry information; that means we included robot's orientation in EKF algorithm. This information had gotten with an IMU (Inertial Measurement Unit), which we installed in the robot. Finally, we want to point out that all the components used into the robotics' platform are low cost.

关键词： Simultaneous localization and mapping Cameras Vehicles Robot kinematics

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：