检索结果-内蒙古大学图书馆

IASTED International Conference on Modelling, Simulation, and Identification, MSI 2009

作者： Qiao, Daoe Luo, Hong Xu, Xiaoli Beijing Key Laboratory Measurement and Control of Mechanical and Electrical System Beijing Information Science and Technology University Beijing 100192 China School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9780889868106

We design a complete platform of wireless acoustic sensor network, featuring with compressive sampling and adaptive sampling. The compressive sampling is a new theory that combines sampling and compression into a single linear measurement process. It captures signals at a rate significantly below the Nyquist rate, and recovers exactly the original signals using convex optimization or greedy algorithm. In addition, we adopt an adaptive sampling scheme, in which the sampling rates can be changed with the running stages. The detective stage works at a lower rate than the monitoring stage. There is only one sensor node running at monitoring stage for the interested event. Through experiments, we illustrate that the wireless acoustic sensor network we built achieves dramatic low sampling rate and utilizes the network bandwidth much more effective.

关键词： Compressed sensing

来源：评论

学校读者我要写书评

暂无评论

Study of assembly line dynamic balancing based on simulation

Study of assembly line dynamic balancing based on simulation

引用

International technology and Innovation Conference 2009 (ITIC 2009)

作者： Hongjun Wang Hongfeng Wang Huaicun Zhang School of Mechanical and electronic Engineering Beijing Information Science and Technology University Beijing China Key Laboratory of Modem Measurement & Control Technology Ministry of Education Beijing China Yantai Economic Technology Development Zone Yantai China

An assembly line balancing method based on Genetic algorithm (GA) and visual simulation is proposed for the assembly line dynamic balancing in order to take into account more factors in addition to the implicit factors. Firstly, the assembly line virtual digital model is created based on systematic layout planning (SLP). Secondly, the GA for solving assembly line dynamic balancing is presented on the conditions that minimize the number of stations and the tasks assigned to a set of workstations with the same cycle time. In the view of assembly line visual modelling and simulation, the visual simulation based on eM-plant is adopted. This system framework and simulation process is discussed. The assembly line balancing system is developed based on the object-oriented language VC++6.0 with the access database. The gear-box assembly line case is studied by using this system. The results showed the method is valid and effective. It can be used to provide the technology support for improving the production efficiency and redesigning the assembly line for the manufacturing plant.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optimal guaranteed cost control for an uncertain discrete T-S fuzzy system with time-delay

引用

控制理论与应用（英文版） 2009年第2期7卷 144-150页

作者： Renming WANG Thierry Marie GUERRA Juntao PAN College of Electrical Engineering and Information Technology Three Gorges University Yichang Hubei 443002 China LAMIH UMR CNRS Universite de Valenciennes et du Hainaut-Canbresis Le Mont Houy Valenciennes Cedex France Key Laboratory of Measurement and Control of CSE of Ministry of Education Southeast University Nanjing Jiangsu 210096 China

This paper considers the guaranteed cost control problem for a class of uncertain discrete T-S fuzzy systems with time delay and a given quadratic cost function. Sufficient conditions for the existence of such controllers are derived based on the linear matrix inequalities （LMI） approach by constructing a specific nonquadratic Lyapunov-Krasovskii functional and a nonlinear PDC-like control law. A convex optimization problem is also formulated to select the optimal guaranteed cost controller that minimizes the upper bound of the closed-loop cost function. Finally, numerical examples are presented to demonstrate the effectiveness of the proposed approaches.

关键词： Fuzzy system Time delay Linear matrix inequalities （LMI） Guaranteed cost control

来源：评论

学校读者我要写书评

暂无评论

Modified Particle Filter for Object Tracking in Low Frame Rate Video

Modified Particle Filter for Object Tracking in Low Frame Ra...

引用

Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Tao Zhang Shumin Fei Hong Lu Xiaodong Li the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationInstitute of AutomationSoutheast University the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Institute of AutomationSoutheast University School of Automation Nanjing Institute of Technology

Object tracking algorithm using modified Particle filter in low frame rate(LFR) video is proposed in this paper,which the object moving significantly and randomly between consecutive frames in the low frame rate ***,Particle filtering use motion transitions to model the movement of the ***,in object tracking with low frame rate sequences,it is very difficult to model significant random jumps of *** key notion of our solution is that using the object detection and extraction to locate the tracked object,while not using the dynamical *** propagate the sample set around the detected regions,which the samples are assumed to be uniformly distributed in the neighborhoods of the detected *** is similar to the general particle filter to propagate *** we compute the likelihood between the target model and the candidate regions,which are based on color histogram *** extensive experiments show that the proposed algorithm performs robustly in a large variety of tracking scenarios.

关键词： frame filter Modified Particle Filter for Object Tracking in Low Frame Rate Video Object Filter

来源：评论

学校读者我要写书评

暂无评论

Evaluation of the effect of modal interaction higher than 2nd order in small-signal analysis

Evaluation of the effect of modal interaction higher than 2n...

引用

IEEE General Meeting Power& Energy Society

作者： Qi Huang Zhouqiang Wang Changhua Zhang Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

This paper attempts to obtain insight about the effect of modal interaction of higher than 2 nd order in small-signal analysis, through evaluating the effect of 3 rd order modal interaction. The indices that quantify the 3 rd order modal interaction are defined, following the modal analysis procedures used in linear modal analysis and second order modal analysis. Numerical simulation results demonstrates that, there are definitely modal interaction higher than 2 nd order, and with further higher order modal analysis, it is possible to detect more information about modal interaction, which might be useful in power system control.

关键词： Power system dynamics Power system modeling Power system analysis computing Power system control Modal analysis Power system stability Power systems Power system interconnection Nonlinear dynamical systems Numerical simulation

来源：评论

学校读者我要写书评

暂无评论

Fault detection for networked control systems via minimum error entropy observer

Fault detection for networked control systems via minimum er...

引用

2nd International Workshop on Advanced Computational Intelligence, IWACI 2009

作者： Zhang, Jianhua Cai, Lei Wang, Hong University of Manchester PO Box 88 Manchester M60 1QD United Kingdom Beijing Key Laboratory Industrial Process Measurement and Control New Technology and System North China Electric Power University Beijing 102206 China

ISBN: (纸本)9783642031557

In this paper, a novel fault detection scheme is presented for networked control systems with random delays and noises. Since the random noises and delays existed in networked control system are probably non- Gaussian, the extended Luenberger observer under minimum error entropy frame is utilized to generate residual so as to detect faults in networked control systems. Finally, an illustrative example is given to demonstrate the effectiveness of the proposed method. © 2009 Springer-Verlag Berlin Heidelberg.

关键词： Networked control systems

来源：评论

学校读者我要写书评

暂无评论

A Minimized Zero Mean Entropy Approach to Networked control Systems

A Minimized Zero Mean Entropy Approach to Networked Control ...

引用

Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Jianhua Zhang Hong Wang Beijing Key Laboratory of Industrial Process Measurement & Control New Technology and System North China Electric Power University Control Systems Centre The University of Manchester

A novel control method is proposed for networked control systems with nonlinear process,probably non-Gaussian process noise and time *** performance index of closed loop control system consists of entropy,mean value and control energy *** stochastic control methods for networked control systems are given under the same general *** method utilizes gradient optimal techniques to obtain an optimal control law,and the stability of closed loop systems is *** other method gives the optimal solution of control law *** implementation issues are *** sliding window techniques and non-parametric probability density function estimation techniques are employed to obtain the entropy of tracking error *** a result,the controller can be on-line ***,the methodology is illustrated by simulations.

关键词： Gaussian A Minimized Zero Mean Entropy Approach to Networked control Systems

来源：评论

学校读者我要写书评

暂无评论

Design of an adaptive on-load de-icing scheme for overhead power transmission line

Design of an adaptive on-load de-icing scheme for overhead p...

引用

IEEE General Meeting Power& Energy Society

作者： Qi Huang Yong Chen Changhua Zhang Sichuan Provincial Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

This paper reports part of the results in the project to develop an on-load de-icing system. In the system, a high frequency high voltage excitation with adjustable frequency, is used to de-ice the ice covered on long power transmission line. The system is highly efficient in de-icing due to the joint heating effect brought by transmission line loss and dielectric loss. The mathematical model of the system is developed. And on the basis of analysis and numerical simulation results, an adaptive scheme is designed. In the system, networked sensors are deployed to monitor the ice condition on transmission line, and on-line regulate the frequency of the high-voltage excitation according to the monitored ice information, to ensure that there is no severe ice-covering spot on long transmission line.

关键词： Power transmission lines Frequency Ice Dielectric losses Propagation losses Condition monitoring Voltage Heating Mathematical model Numerical simulation

来源：评论

学校读者我要写书评

暂无评论

Study of Sliding-Mode control Based Grid-side PWM Rectifier for Wind Power Generation System under Unbalanced Input Voltage Condition

Study of Sliding-Mode Control Based Grid-side PWM Rectifier ...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Jianhua Zhang Xiaojun Li Guolian Hou Xuemin An Beijing Key Laboratory of Industrial Process Measurement & Control New Technology and System North China Electric Power University Beijing China

ISBN: (纸本)9781424427994

A sliding mode control scheme is presented in αβframe for grid-side PWM rectifiers in wind power generation systems. The positive and negative sequence voltages are needed to design the controller, nevertheless, the positive and negative sequence currents are not needed. This scheme is compared with the dual current control scheme in the rotating frame d-q. The simulation results show that sliding mode control scheme can realize unit power factor operation when the amplitude is unbalanced.

关键词： Grid-side PWM rectifier Unbalanced voltage Sliding-mode control

来源：评论

学校读者我要写书评

暂无评论

Development of a tool for the analysis of power system higher order oscillation

Development of a tool for the analysis of power system highe...

引用

IEEE General Meeting Power& Energy Society

作者： Zhouqiang Wang Qi Huang Changhua Zhang Sichuan Provincial Key Laboratory of Power System Wide-area Measurement and Control University of Electronic Science and Technology Chengdu Sichuan China

The analysis of higher order modal interaction attracts much attention from scholars all over the world. The normal form theory and the modal series method offer new ideas for solving these problems. However, literature review and simulation show that modal analysis for a certain case with these approaches may obtain different results. In this paper, the currently available methods are integrated into a tool PSMAT (power system modal analysis tool), so that one can compare the results with different approaches, and then select the most appropriate method for his analysis purpose. The developed tool has all the functionalities in modal analysis as well as the quantitative indices. The design of the tool is described and case studies are presented. The results obtained with this tool are discussed. It is verified that this tool is effective, in both modal analysis and comparison of the approaches.

关键词： Power system analysis computing Modal analysis Power system modeling Power system simulation Power system stability Power system interconnection Taylor series Signal analysis Performance analysis Equations

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：