检索结果-内蒙古大学图书馆

作者： Zhao, Bin Ma, Kai Guan, Xinping Institute of Electrical Engineering Key Laboratory of Industrial Computer Control Engineering of Hebei province Yanshan University Qinhuangdao 066004 China School of Electronics Information and Electrical Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9787894631046

Spectrum allocation is one of the most important problems in cognitive radio networks. However, the channel differentiated algorithms have not been emphasized in the current literature. This paper first proposes a classification criterion for heterogeneous channels. Then, an allocation algorithm for the channel classification is provided with the consideration of channel differences and spatial reuse of primary user's channels. Simulation result shows that the proposed algorithm improves the spectrum utilization and other network performance.

关键词： Cognitive radio

来源：评论

学校读者我要写书评

暂无评论

Dynamics Modeling and Robust Trajectory Tracking control for a Class of Hybrid Humanoid Arm Based on Neural Network

引用

Chinese Journal of Mechanical engineering 2009年第3期22卷 355-363页

作者： WANG Yueling JIN Zhenlin College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

In order to solve the problem of trajectory tracking for a class of novel serial-parallel hybrid humanoid arm（HHA）, which has parameters uncertainty, frictions, disturbance, abrasion and pulse forces derived from motors, a multistep dynamics modeling strategy is proposed and a robust controller based on neural network（NN）-adaptive algorithm is designed. At the first step of dynamics modeling, the dynamics model of the reduced HHA is established by Lagrange method. At the second step of dynamics modeling, the parameter uncertain part resulting mainly from the idealization of the HHA is learned by adaptive algorithm. In the trajectory tracking controller, the radial basis function（RBF） NN, whose optimal weights are learned online by adaptive algorithm, is used to learn the upper limit function of the total uncertainties including frictions, disturbances, abrasion and pulse forces. To a great extent, the conservatism of this robust trajectory tracking controller is reduced, and by this controller the HHA can impersonate mostly human actions. The proof and simulation results testify the validity of the adaptive strategy for parameter learning and the neural network-adaptive strategy for the trajectory tracking control.

关键词： hybrid humanoid arm dynamic modeling neural network adaptive control trajectory tracking

来源：评论

学校读者我要写书评

暂无评论

Application of virtual instrument in sewage multiparameter online monitoring system

Application of virtual instrument in sewage multiparameter o...

引用

2009 International Workshop on Intelligent Systems and Applications, ISA 2009

作者： Zang, Huaigang Feng, Simeng Key Lab of Industrial Computer Control Engineering of Hebei Province Qinhuangdao China

ISBN: (纸本)9781424438945

Based on the design concept of virtual instrument and the design method of function modulation, using PC machine and data acquisition card as hardware system, proposed a design of sewage multi-parameter online monitoring system which based on application program platform of labVIEW. The system has friendly human-machine interface, the function is comprehensive and it is easy to operate. It has achieved the sewage multiparameter collecting, recording, controlling and management automatic, and enhanced the automaticity of the sewage collecting and examination. The test indicated that the system worked well, achieved the anticipated target. © 2009 IEEE.

关键词： Sewage

来源：评论

学校读者我要写书评

暂无评论

Multi-Channel Assignment in Wireless Sensor Networks: A Game Theoretic Approach

Multi-Channel Assignment in Wireless Sensor Networks: A Game...

引用

2010 Proceedings IEEE INFOCOM

作者： Qing Yu Jiming Chen Yanfei Fan Xuemin (Sherman) Shen Youxian Sun State Key Lab of Industrial Control Technology Zhejiang University Hangzhou 310027 P.R.China Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada

ISBN: (纸本)9781424458363

In this paper, we formulate multi-channel assignment in Wireless Sensor Networks (WSNs) as an optimization problem and show it is NP-hard. We then propose a distributed Game Based Channel Assignment algorithm (GBCA) to solve the problem. GBCA takes into account both the network topology information and transmission routing information. We prove that there exists at least one Nash Equilibrium in the channel assignment game. Furthermore, we analyze the sub-optimality of Nash Equilibrium and the convergence of the Best Response in the game. Simulation results are given to demonstrate that GBCA can reduce interference significantly and achieve satisfactory network performance in terms of delivery ratio, throughput, channel access delay and energy consumption.

关键词： Wireless sensor networks Game theory Routing Interference Protocols Network topology Nash equilibrium Radio transceivers Autonomous agents Sensor phenomena and characterization

来源：评论

学校读者我要写书评

暂无评论

Error mensuration of temperature coefficient between formation flying small satellites TT&C equipmen

Error mensuration of temperature coefficient between formati...

引用

2nd International Workshop on computer Science and engineering, WCSE 2009

作者： Hai-bin, Li Jun-yan, Guo Hai-ming, Liu Key Lab of Industrial Computer Control Engineering Yanshan University Qinhuangdao 066004 China

ISBN: (纸本)9780769538815

The precise mensuration is needed between the formation flying small satellites, where temperature change results in error measurement. It is a hard problem to compensate the error caused by temperature change. In this paper, we propose a new error mensuration method for the temperature coefficient, which can implement the mensuration of temperature coefficient under the observe noise. This will help to the precise compensation of measuration and synchronization. The simulation results show that the proposed algorithm can achieve the measurement of the temperature coefficient on satellites. © 2009 IEEE.

关键词： Errors

来源：评论

学校读者我要写书评

暂无评论

control strategy and experimental research on girder hoister steering system based on RBF neural network PID

Control strategy and experimental research on girder hoister...

引用

9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Bingyu, Sun Jingyi, Zhao Zhiyong, Wang Chengyu, Yao Rui, Guo Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 China Qinhuangdao Tianye Tolian Heavy Industry Co. Ltd. Qinhuangdao 066100 China Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

ISBN: (纸本)9781424438624

n order to meet the needs of construction of high-speed railway passenger dedicated line, 900t rubber-tyred girder hoister is researched and manufactured. Steering system of the hoister is controlled by electro-hydraulic proportional displacement control system, and segment-PID control strategy with dead zoon is used. However with the passage of time, steering performance of girder hoister begin to get worse and worse. Then, valve control cylinder model, equilibrium equation of the steering actuator and system model is built up. Through analyzing and referring advantage of the neural network, one kind of steering control strategy based on RBF neural network PID is presented. Based on similarity principle, this control strategy is used in the steering system of 100t ship yard transporter. The experiment has been lasted 3 months, and the result shows that the system settling time reduced by 5%, over shoot doesn't change, and performance doesn't get worse. Validity of the control strategy is validated. ©2009 IEEE.

关键词： Three term control systems

来源：评论

学校读者我要写书评

暂无评论

PTFW: A protocol testing framework for wireless sensor networks 09

PTFW: A protocol testing framework for wireless sensor netwo...

引用

2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009

作者： Fan, Jialu Chen, Jiming Deng, Ruilong Sun, Youxian Shen, Xuemin State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou China Dept. of Electrical and Computer Engineering University of Waterloo Waterloo Canada

ISBN: (纸本)9781605585697

Protocol testing has been one of the most active fields in computer networks. In Wireless Sensor Networks (WSNs),before directly employing protocols on hardware testbed, we expect an effective test framework to verify the logical cor-rectness of protocols on computers, which could facilitate the whole test process. Towards this goal, this paper introduces an upper test framework in WSNs, namely Protocol Testing Framework for WSNs (PTFW). PTFW is a visual client-server test framework which is built upon the unique features of WSNs. It is based on the layered architecture of WSNs and uses Finite State Machine (FSM) theory as the kernel. The proposed test framework is developed on Linux Operating System (OS) and coded in standard C language for the consideration of compatibility for real-world implementation. PTFW provides the standards/specifications of conformance testing for test on hardware testbed. To validate the performance and effectiveness of PTFW, we apply it to a real-world WSNs protocol. The results show that PTFW exhibits excellent visual and real-time features, which bring considerable convenience to the later employments on testbed. Copyright © 2009 ACM.

关键词： Wireless sensor networks

来源：评论

学校读者我要写书评

暂无评论

PSO algorithm-based schedule optimization for tandem cold mills

PSO algorithm-based schedule optimization for tandem cold mi...

引用

IEEE International Conference on Automation and Logistics

作者： Haijun Che Qing Zhang Jingming Yang Xinyan Han Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University슠 Hebei China

ISBN: (纸本)9781424447947

The cold rolling production scheduling problem is an extremely difficult process, so it is quite difficult to achieve an optimal solution with traditional optimization methods. Based on rolling feature of continuous tandem cold rolling mill, such as multi-variable, strong coupling, non-linear, this paper presents a particle swarm optimization (PSO) algorithm schedule optimization procedure for tandem cold rolling mills, base to computer powerful data processing capacity. Adopt the power distribution cost function as objective function, make the rolling force, rolling power, rolling torque, speed and other parameters meet certain requirement. Sequential unconstrained minimization technique (SUMT) replaces a constrained optimization problem with a sequence of unconstrained optimization problem. Apply PSO algorithm to optimize the objective function to obtain the optimal solution. It makes the reasonable distribution of tandem cold rolling power, gives full play to equipment capacity and improves the production efficiency.

关键词： Scheduling algorithm Optimal scheduling Milling machines Production Constraint optimization Optimization methods Particle swarm optimization Processor scheduling Data processing Power distribution

来源：评论

学校读者我要写书评

暂无评论

A VARIABLE STEP SIZE LMS ADAPTIVE FILTERING ALGORITHM BASED ON THE NUMBER OF COMPUTING MECHANISMS

A VARIABLE STEP SIZE LMS ADAPTIVE FILTERING ALGORITHM BASED ...

引用

2009 International Conference on Machine Learning and Cybernetics(2009机器学习与控制论国际会议)

作者： FU-CAI LIU YAN-XIN ZHANG YA-JING WANG Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan UniversityQin Huang Dao 066004 China

This paper proposes a novel variable step size LMS algorithm based on the number of computing mechanisms by analyzing the basic principles of the variable step LMS adaptive filtering algorithms. The algorithm establishes a different nonlinear relation-ship between step factor and error signal based on the different sampling time, which not only can control step size by using sampling time indirectly, but also change the parameters to meet the requirement of fast convergence. Compared with the other variable step algorithms, this algorithm is proved to have faster convergence speed and higher stability.

关键词： Adaptive filtering Many computing mechanism Variable step size LMS

来源：评论

学校读者我要写书评

暂无评论

Adaptive fuzzy tracking control for robotic manipulators with adjustable gains

Adaptive fuzzy tracking control for robotic manipulators wit...

引用

IEEE International Conference on Mechatronics and Automation

作者： Hongbin Wang Xiaobo Wang Yueling Wang Key Laboratory of Industrial Computer Control Engineering Yanshan University슠 Qinhuangdao Hebei China College of Mechanical Engineering Yanshan University슠 Qinhuangdao Hebei China

In this paper, an adaptive fuzzy scheme for trajectory tracking is developed for robotic systems with parameter uncertainties and external disturbance. Within the scheme, a fuzzy logic system is employed to approximate the unknown robotic dynamics. Then, an adaptive fuzzy controller is obtained which combine with the adaptive methods so as to eliminate the system uncertainties and external disturbance. And the adaptive laws are obtained through stable control algorithms based on the Lyapunov stability theorem. Moreover, extra control terms are designed to cancel the approximation errors, and the adjustable gains obtained from a Fuzzy Logic System (FLS) are considered to receive the satisfying control effects. The proposed controller is robust to structured uncertainties and unstructured uncertainties, and the validity of the control scheme is shown by simulations on a novel 2-DOF parallel mechanism, which is driven by linear motors.

关键词： Programmable control Adaptive control Fuzzy control Robot control control systems Uncertainty Fuzzy systems Fuzzy logic Manipulator dynamics Trajectory

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：