检索结果-内蒙古大学图书馆

Parameter-dependent vibration-attenuation controller design for electro-hydraulic actuated linear structural systems

引用

Earthquake engineering and engineering Vibration 2012年第1期11卷 73-82页

作者： Weng Falu Mao Weijie State Key Lab of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China School of Mechanical and Electrical Engineering Jiangxi University of Science and Technology Ganzhou 341000 China

The problem of robust active vibration control for a class of electro-hydraulic actuated structural systems with time-delay in the control input channel and parameter uncertainties appearing in all the mass, damping and stiffness matrices is investigated in this paper. First, by introducing a linear varying parameter, the nonlinear system is described as a linear parameter varying （LPV） model. Second, based on this LPV model, an LMI-based condition for the system to be asymptotically stabilized is deduced. By solving these LMIs, a parameter-dependent controller is established for the closed- loop system to be stable with a prescribed level of disturbance attenuation. The condition is also extended to the uncertain case. Finally, some numerical simulations demonstrate the satisfying performance of the proposed controller.

关键词： structural system electro-hydraulic servo system robust stabilization vibration attenuation parameter-dependent controller

来源：评论

学校读者我要写书评

暂无评论

Hybrid brain/muscle-actuated control of an intelligent wheelchair

Hybrid brain/muscle-actuated control of an intelligent wheel...

引用

IEEE International Conference on Robotics and Biomimetics

作者： Zhijun Li Shuangshuang Lei Chun-Yi Su Guanglin Li Key Lab of Autonomous System and Network Control Ministry of Education and College of Automation Science and Engineering South China University of Technology Guangzhou China Department of Mechanical and Industrial Engineering Concordia University Montreal Canada Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen Guangdong China

Brain-computer interface (BCI) controlled wheelchair robots can serve as powerful aids for severely disabled people in their daily life, especially to help them move voluntarily. In order to better understand human “thought”, owing to the development of the hybrid brain/muscle interface technique, in this paper, we present a real-time hybrid brain/muscle interface to control a wheelchair directly to keep the disables recovering several motion capabilities by using noninvasive motor imagery Electroencephalography (EEG) and Electromyography (EMG). The EMG and EEG signals from the users are extracted to control the motion of an intelligent wheelchair. Both signals processing consists of off-line training, online control evaluation, and real-time control. An algorithm called the common spatial patterns (CSP) is used in this human-robot system to extract the most discriminative spatial patterns pairs as features. The extensive experiments were conducted on the developed human-wheelchair systems to verify the proposed approaches.

关键词： Wheelchairs Electroencephalography Electromyography Training Robots Muscles Real-time systems

来源：评论

学校读者我要写书评

暂无评论

Soft sensing and optimization of pesticide waste incinerator

Soft sensing and optimization of pesticide waste incinerator

引用

作者： Yan, Zhengbing Liu, Xinggao State Key Lab of Industrial Control Technology Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China

Three soft sensor models [radial basis function (RBF), support vector machine (SVM), and independent component analysis-support vector machine (ICA-SVM)] are developed to infer the Chemical Oxygen Demand (COD) of the quench water produced from the pesticide waste incinerator, respectively. An optimization model of COD is further proposed based on the aforementioned soft sensor models. Furthermore, chaos genetic algorithm is introduced to solve the optimization model. The procedure is demonstrated and discussed with the practical industrial cases, where the mean relative error of the proposed ICA-SVM model for COD prediction is 0.16%, and the mean COD of the practical factory is decreased from original 1140 mg/L to current 393 mg/L, decreasing 65.53%, with the proposed optimal soft sensing approach. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.

关键词： Chemical oxygen demand

来源：评论

学校读者我要写书评

暂无评论

Energy-efficient Contact Probing in Opportunistic Mobile Networks

Energy-efficient Contact Probing in Opportunistic Mobile Net...

引用

International Conference on computer Communications and Networks

作者： Huan Zhou Huanyang Zheng Jie Wu Jiming Chen State Key Lab. of Industrial Control Technology Zhejiang University Hangzhou China Department of Computer and Information Sciences Temple University USA

In Opportunistic Mobile Networks (OppNets), data is opportunistically exchanged between nodes who encounter each other. In order to enable such data exchanges, nodes in the network have to probe their environment continually, so as to discover neighbor nodes. This can be an extremely energy-consuming process. If nodes probe very frequently, they will consume a lot of energy, and might be energy inefficient. On the other hand, infrequent contact probing might cause nodes to miss many of their contacts, and thus opportunities to exchange data are lost. Therefore, there exists a trade-off between energy efficiency and the contact opportunities in OppNets. In this paper, in order to investigate this trade-off, we first propose a model to quantify the detecting probability in OppNets, using the Random WayPoint (RWP) model. Then, extensive simulations are conducted to validate the correctness of our proposed model. Finally, based on the proposed model, we analyze the tradeoff between energy efficiency and the total number of effective contacts under different situations. Our results show that the good trade-off points are obviously different when the speed of nodes is different. Moreover, the detecting probability increases as the speed of nodes decreases, while the total number of effective contacts increases as the speed of nodes increases.

关键词： Opportunistic Mobile Networks Energy consumption Contact probing Random WayPoint model

来源：评论

学校读者我要写书评

暂无评论

CLSIFT: An Optimization Study of the Scale Invariance Feature Transform on GPUs

CLSIFT: An Optimization Study of the Scale Invariance Featur...

引用

IEEE International Conference on High Performance Computing and Communications (HPCC)

作者： Weiyan Wang Yunquan Zhang Long Guoping Shengen Yan Haipeng Jia School of Computer and Control Engineering University of Chinese Academy of Sciences Beijing China State Key Laboratory of Computing Science Institute of Software Chinese Academy of Sciences Lab. of Parallel Software and Computational Science Institute of Software Chinese Academy of Sciences

Scale Invariance Feature Transform (SIFT) is quite suitable for image matching because of its invariance to image scaling, rotation and slight changes in illumination or viewpoint. However, due to high computation complexity it's technically challenging to deploy SIFT in real time application situations. To address this problem, we propose CLSIFT, an OpenCL based highly speeded up and performance portable SIFT solution. Important optimization techniques employed in CLSIFT such as: (1) For less global memory traffic, independent logical functions are merged into the same kernel to reuse data. (2) loop buffers are introduced in for data and intermediate results reusing. (3)Task queue used to schedule threads in the same branch to remove branch divergences. (4) Data partition is based on the statics patterns for workload balance among workgroups. (5) Overlap of CPU time and better parallel strategies are used too. With all mentioned efforts, CLSIFT processes lena. jpg at 74.2 FPS and 43.4FPS respectively on NVidia and AMD GPUS, much higher than CPU's nearly 10 FPS and the known fastest SIFTGPU's 39.8 FPS and 13FPS. Moreover in a quantitative comparison approach we analyze those successful strategies beating SIFTGPU, a famous existing GPU implementation. Additionally, we observe and conclude that NVidia GPU achieves better occupancy and performance due to some factors. Finally, we summarize some techniques and empirical guiding principles that may be shared by other applications on GPU.

关键词： Graphics processing units Instruction sets Kernel Accuracy Histograms Optimization Memory management

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “Development and investigation of efficient artificial bee colony algorithm for numerical function optimization” [Appl. Soft Comput. 12 (2012) 320–332]

引用

Applied Soft Computing 2013年第4期13卷 2143-2143页

作者： Guoqiang Li Peifeng Niu Xingjun Xiao Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China

来源：评论

学校读者我要写书评

暂无评论

Object Tracking Method Based on SURF

Object Tracking Method Based on SURF

引用

2012 Conference on Modelling, Identification and control (MIC2012)

作者： Hu Shuo Wu Na Song Huajun Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical EngineeringYanshan University Key Lab of Measurement Technology & Instrumentation of Hebei Province Institute of Electrical EngineeringYanshan University Institute of Information and Control Engineering China University of Petroleum(East China)

ISBN: (纸本)9781627483766

An object tracking algorithm based on SURF is presented in this *** points are detected by SURF detector in reference region which is located in the first frame *** the following sequences,the SURF feature points are extracted in a larger window which is selected as test *** the matching stage,we calculate the Euclidean distance between the descriptor vectors of interest points in the test image and ones in the reference *** proposed algorithm is implemented on an embedded platform with TI's DM6446 high performance *** experimental results show that our system implements a real-time tracking with robustness against appearance variations,scale change,and cluttered scenes.

关键词： Object track SURF descriptor feature detection DM6446

来源：评论

学校读者我要写书评

暂无评论

Adaptive learning based fault tolerant control for uncertain nonlinear systems

Adaptive learning based fault tolerant control for uncertain...

引用

2012 International Conference on Machine Learning and Cybernetics, ICMLC 2012

作者： Yang, Qinmin Liu, Bingnan Yu, Zhiwen State Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Zhejiang University Hangzhou China School of Computer Science and Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9781467314855

This paper introduces a fault tolerant controller design for nonlinear unknown systems with multiple actuators and bounded disturbance. The controller consists of an adaptive learning-based control law and a switching function mechanism. The adaptive control law is implemented by a two-layer neural network and the switching function is designed to automatically search for the correct switching vector to turn off the unknown faulty actuator if there is any. The stability of the system output under the occurrence of actuator failure is proved through standard Lyapunov approach, while the other signals are guaranteed to be bounded. The theoretical result is substantiated by a simulation example with a continuous stirred tank reactor. © 2012 IEEE.

关键词： Switching functions

来源：评论

学校读者我要写书评

暂无评论

Hybrid neural network based on ART2 - BP information fusion control in Circulating Fluidized Bed Boiler (CFBB) 1

引用

5th International Conference on Advances in Brain Inspired Cognitive Systems, BICS 2012

作者： Niu, Peifeng Ma, Yunfei Li, Pengfei Zhang, Yang Li, Guoqiang Zhang, Xiangye Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Qinhuangdao 066004 China

ISBN: (数字)9783642315619

ISBN: (纸本)9783642315602

Circulating Fluidized Bed Boiler (CFBB) involves a kind of combustion boiler that can clean and desulfurize the coal efficiently in the combustion process. It is highly adapted to all kinds of high quality coals and low grade coals. CFB boiler has more superior performance, features and a wide range of applications than other boilers, accordingly, problems on automatic control underlined in the combustion process blocked its wide application. This is a typical thermal object, hard to control,and due to the special combustion type of CFBB that makes it a great inertia, multivariable, strong coupling, nonlinear, time-varying object. This paper designs an ART2-BP-BP Hybrid Neural Network of fusion cluster control system and completes data fusion from the data level, the feature level to the decision level. Results of simulation show that the control system in this paper is feasible and effective, in particular, the control system still has more satisfactory control effects in the case of a variety of sensor failures. © 2012 Springer-Verlag.

关键词： control systems

来源：评论

学校读者我要写书评

暂无评论

Effects and solution of electric power steering system on vehicle handling stability

引用

Journal of Computational Information Systems 2012年第1期8卷 65-72页

作者： Zang, Huaiquan Geng, Jia Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical and Engineering Yanshan University Qinhuangdao 066004 China

To research the effects of electric power steering (EPS) system on vehicle handling stability and to improve it, this paper derives the expressions of road feeling and steering sensitivity, regards which as the performance targets that estimates the vehicle handling stability in addition. Finally, a dynamic compensation controller is presented for the EPS system. The simulation results show the compensated EPS system takes account of a good steering feeling and a rapid response of steering sensitivity. Its handing stability is better than the EPS vehicle which only considers the power effect. © 2012 Binary Information Press January 2012.

关键词： Steering

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：