检索结果-内蒙古大学图书馆

2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Guolian Hou Jianhua Zhang Rui Wang Jian Han Beijing Key Laboratory of Industrial Process Measurement & Control New Technology and System North Beijing Key Laboratory of Industrial Process Measurement & Control New Technology and System North

Considering the electricity price’s volatility and various elements which affect the price in the electricity market, the paper presents hybrid model for the day-ahead electricity market clearing price forecasting. The paper adopts autoregressive moving average (ARMAX) model to reveal the linear relationship between power load and electricity price;the generalized autoregressive conditional heteroskedasticity (GARCH) model to reveal the heteroskedasticity properties of residual. Simultaneously the paper presents the inexactness and irrationality that modeling by the historical data long ago to forecast the price with the change of the time, then presents the rolling forecast that constantly using the latest data to modeling the ARMAX-AR-GARCH model. To reveal the nonlinear relationship between power load and electricity price, the paper adopts least squares support vector machine (LS-SVM). Using the proposed method, the day-ahead electricity prices of California electricity market are forecasted, prediction results show the efficiency of the proposed method.

关键词： day-ahead price forecast ARMAX GARCH rolling forecast LS-SVM

来源：评论

学校读者我要写书评

暂无评论

Belief propagation with local edge detection-based cost aggregation for stereo matching

Belief propagation with local edge detection-based cost aggr...

引用

IEEE International Conference on Image Processing

作者： Fu He Feipeng Da Key Laboratory of Measurement and Control for Complex System of Ministry of Education Research Institute of Automation South East University Nanjing China

In this paper, the importance of cost aggregation for belief propagation (BP) and the interaction of them are discussed. A global stereo matching algorithm based on BP with local edge detection-based cost aggregation is proposed. Firstly, a virtual closed edge is formed surrounding each pixel via second derivative operator in order to construct the adaptive window. Then, for centered pixel, local cost aggregation is calculated on support pixels in adaptive window. Finally, BP optimization algorithm is used to obtain the disparity. The experiments based on Middlebury benchmark indicate that local edge detection-based cost aggregation can do well with BP and also show encouraging results of proposed stereo matching algorithm.

关键词： Image edge detection Image color analysis Belief propagation Optimization Light emitting diodes Image segmentation Accuracy

来源：评论

学校读者我要写书评

暂无评论

H∞ robust control of direct-drive permanent magnetic synchronous generator considering the uncertainty of stator parameters

H∞ robust control of direct-drive permanent magnetic synchr...

引用

作者： Zu, Hui Zhang, Guo-Bao Fei, Shu-Min Wei, Zi-Cong Zhu, Hai-Rong School of Automation Southeast University Nanjing 210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast University Ministry of Education Nanjing 210096 China

ISBN: (纸本)9789881725592

The robust control issues of direct-drive permanent magnet synchronous generator (DD-PMSG) are discussed, in which the variation of stator resistances and inductance are considered. The speed loop of DD-PMSG is a linear system with several ways of disturbance inputs, so the H∞ mixed sensitivity control method is applied to eliminate the torque disturbance and measurement noise. The current loop is regarded as an uncertain DESCRIPTOR system and the output-feedback H∞ robust control algorithm for the uncertain DESCRIPTOR system is proposed. Linear matrix inequalities (LMI) is adopted to prove the sufficient conditions of descriptor system quadratic stability and satisfying the H∞ robust performances, and then an output feedback controller is presented. Simulation results show that comparing with PI controller and the standard H∞ method designed controller, the proposed controller has better response and control accuracy, the inhibition of disturbance input and parameter uncertainty has better robustness than the PI controller, and less conservative than the standard H∞ controller. © 2011 Chinese Assoc of Automati.

关键词： Linear matrix inequalities

来源：评论

学校读者我要写书评

暂无评论

Matching decision model for self- adaptability of knowledge manufacturing system

Matching decision model for self- adaptability of knowledge ...

引用

2011 International Conference on Information Science and Technology, ICIST 2011

作者： Wang, Yufang Yan, Hongsen Meng, Xiangang Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing Jiangsu Province 210096 China School of Information and Control Engineering Nanjing University of Information Science and Technology Nanjing Jiangsu Province 210044 China

ISBN: (纸本)9781424494408

Knowledge manufacturing system has the ability of modifying dynamically manufacturing mode rapidly when production environment factors change. It is essential to evaluate the matching degree of established manufacturing mode and changed production environment factors. In this paper, a matching decision model for self-adaptability of knowledge manufacturing system based on the fuzzy neural network is proposed. The changed production environment factors are regarded as linguistic variable inputs. A modified momentum factor B-P algorithm consisting of information feed-forward process and the error back-propagation process is used. The proposed FNN model is employed to evaluate the matching degree of a car-lamp production manufacturing mode to variable environment units. Matching result indicates adaptive degree of manufacturing system. Experiment result demonstrates the method is effective. © 2011 IEEE.

关键词： Manufacture

来源：评论

学校读者我要写书评

暂无评论

Adaptive control of 6-DOF parallel manipulator

Adaptive control of 6-DOF parallel manipulator

引用

作者： Jin, Qinglong Chen, Wenjie School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing 100081 China

ISBN: (纸本)9789881725592

This paper presents an adaptive controller equipped with disturbance rejection capability for a 6 degrees of freedom (6-DOF) parallel manipulator. The control scheme is proposed given that the 6-DOF parallel manipulator system's parameters are all subject to uncertainties, and only the positions and the velocities of links are measurable. In this paper, the dynamics of the 6-DOF parallel manipulator is denoted in the Lagrange method, and, as well as an appropriate storage function, some important properties of the dynamics are derived to develop an adaptive controller which, by the penalty signal chosen, can drive the motion tracking error to zero asymptotically. Lyapunov theory is used to guarantee the stability of the system. Simulation results show that the 6-DOF adaptive control system has a good tracking performance in both normal and extreme limited working conditions. © 2011 Chinese Assoc of Automati.

关键词： Adaptive control systems

来源：评论

学校读者我要写书评

暂无评论

Virtual realization of dynamic path planning in target-creator based on Vega/HLA

Virtual realization of dynamic path planning in target-creat...

引用

作者： Zhu, Wenbin Zhang, Juan Yu, Haixin Peng, Zhihong School of Automation Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing 100081 China

ISBN: (纸本)9789881725592

The importance of testing for multi-targets detecting and tracking algorithms accelerates the current technologies of target-creator system which provides multiple and various targets. Traditional target-creator systems are mostly based on the physical devices or video stream. Based on the need of building virtual environment and realizing system integration, VR technology and HLA technology are applied to improve the efficiency. With VR technology, three-dimensional models and visual scenes are built effectively and method of dynamic path planning is put forward. Through HLA technology, targets position information will be interacted real time, so algorithm evaluation is available by comparing real positions and detection results. In this paper, a virtual target-creator system based on Vega/HLA is designed which cuts down the outlay and time of the experiment. © 2011 Chinese Assoc of Automati.

关键词： Motion planning

来源：评论

学校读者我要写书评

暂无评论

Path planning of robotic fish based on genetic algorithm and modified dynamic programming

Path planning of robotic fish based on genetic algorithm and...

引用

2011 International Conference on Advanced Mechatronic systems, ICAMechS 2011

作者： Yang, Qian Yu, Mei Liu, Shu Chai, Zhong-Ming School of Control and Computer Engineering North China Electric Power University Beijing 102206 China Key Laboratory of Measurement and Control New Technology and System for Industrial Process North China Electric Power University Beijing 102206 China

ISBN: (纸本)9780955529375

In this paper, genetic algorithm and modified dynamic programming are applied to path planning of robotic fish for the first time. Using grid method to the environment modeling and applying genetic algorithm to the path planning, an optimal or sub-optimal robot path can be obtained. Since the robotic fish can't track linear motion, the robot path can be seen as several circular arc. Based on the optimal path obtained via genetic algorithm, modified dynamic programming algorithm is proposed to calculate the shortest circular arc path, fish velocity and direction in every step. Finally the experiment on the robotic fish control software shows the effectiveness of the proposed method. © 2011 Intl Journal of Adv Mechatr.

关键词： Motion planning

来源：评论

学校读者我要写书评

暂无评论

Design and implementation of substation communication software for IED

引用

Dianli Xitong Baohu yu Kongzhi/Power system Protection and control 2011年第24期39卷 132-137页

作者： Hu, Feng-Kai Huang, Qi Jing, Shi Li, Jing The Power System Wide-area Measurement and Control Key Laboratory of Sichuan Province University of Electronic Science and Technology of China Chengdu 611731 China

With the development of smart grid, Intelligent Electronic Device (IED) will be increasingly used in substation protection, control and measurement. A kind of substation communication software for variety of IEDs is designed and implemented. This paper focuses on the overall flow of the system, function library, multithreading architecture, and the design of database. This software utilizes the Modbus TCP/IP which is an openly published, efficient, and widely used communication protocol in the industrial automation field. In order to make the system have a strong scalability, this paper also describes the implementation guide of Modbus based on IPv6. Finally, the performance of the library and the real time capability of the overall system are tested respectively, indicating that this software meets the requirements of being efficient and stable, reliable in the communication of substation.

关键词： Software testing

来源：评论

学校读者我要写书评

暂无评论

Stability analysis on discrete-time Cohen-Grossberg neural networks with bounded distributed delay

Stability analysis on discrete-time Cohen-Grossberg neural n...

引用

作者： Li, Tao Wang, Ting Fei, Shumin School of Electronic Engineering and Automation Henan Polytechnic University Jiaozuo 454000 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing 210096 China

ISBN: (纸本)9789881725592

This paper investigates the asymptotical stability for discrete-time Cohen-Grossberg neural networks with both timevarying and distributed delays. By constructing a novel Lyapunov-Krasovskii functional and introducing some free-weighting matrices, one delay-dependent sufficient condition is obtained by using convex combination. The criterion is presented in terms of LMIs and the feasibility can be easily checked with the help of LMI in Matlab Toolbox. In addition, the activation function can be described more generally, which generalizes those earlier methods. Finally, the effectiveness of obtained results can be further illustrated by one numerical example in comparison with the existent ones. © 2011 Chinese Assoc of Automation.

关键词： Lyapunov functions

来源：评论

学校读者我要写书评

暂无评论

Delay-Derivative-Dependent Synchronization for Coupled Lur'e system with Time-Delay and Nonlinear Couplings

Delay-Derivative-Dependent Synchronization for Coupled Lur'e...

引用

2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Tao Li Ting Wang Shumin Fei School of Electronic Engineering and Automation Henan Polytechnic University Jiaozuo 454000 Henan Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationS Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education

This paper deals with global synchronization in arrays of coupled delayed Lur’e systems with nonlinear couplings, in which the interval variable delay is treated. Together with Krasovskii-Lyapunov functional method and Kronecker product technique, two novel synchronization criteria are presented in terms of linear matrix inequalities (LMIs) based on generalized convex combination, in which the conditions are heavily dependent on upper and lower bounds of time-delay and delay derivative. Through employing LMI in Matlab Toolbox and adjusting some matrix parameters in the derived results, we can realize the designing and applications of the coupled systems. The effectiveness of the proposed methods can be demonstrated by one numerical example with simulations.

关键词： Lur'e systems global synchronization interval time-varying delay nonlinear coupling LMI approach

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：