检索结果-内蒙古大学图书馆

A unified approach to fuzzy modelling and robust synchronization of different hyperchaotic systems

Chinese Physics B 2008年第11期17卷 4056-4066页

作者： Zhang, Hua-Guang Zhao, Yan Yu, Wen Yang, Dong-Sheng School of Information Science and Engineering Northeastern University Shenyang 110004 China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 China Department of Automatic Control Engineering Shenyang Institute of Engineering Shenyang 110136 China Departamento de Control Automatico CINVESTAV-IPN Av. IPN 2508 México D. F. 07360 Mexico

In this paper, a Takagi-Sugeno (T-S) fuzzy model-based method is proposed to deal with the problem of synchronization of two identical or different hyperchaotic systems. The T-S fuzzy models with a small number of fuzzy IF-THEN rules are employed to represent many typical hyperchaotic systems exactly. The benefit of employing the T-S fuzzy models lies in mathematical simplicity of analysis. Based on the T-S fuzzy hyperchaotic models, two fuzzy controllers are designed via parallel distributed compensation (PDC) and exact linearization (EL) techniques to synchronize two identical hyperchaotic systems with uncertain parameters and two different hyperchaotic systems, respectively. The sufficient conditions for the robust synchronization of two identical hyperchaotic systems with uncertain parameters and the asymptotic synchronization of two different hyperchaotic systems are derived by applying the Lyapunov stability theory. This method is a universal one of synchronizing two identical or different hyperchaotic systems. Numerical examples are given to demonstrate the validity of the proposed fuzzy model and hyperchaotic synchronization scheme. © 2008 Chin. Phys. Soc. and IOP Publishing Ltd.

关键词： Synchronization

来源：评论

学校读者我要写书评

暂无评论

Analysis and comparison of pad reinforcement of pressure vessel by elastic and elastoplastic FEM

Analysis and comparison of pad reinforcement of pressure ves...

引用

2007 ASME Pressure Vessels and Piping Conference, PVP 2007

作者： Lihua, Liang Zengliang, Gao Yangjian, Xu Kangda, Zhang Zhaohui, Fan Zhejiang University of Technology Institute of Process Equipment and Control Engineering MOE Key Laboratory of Mechanical Manufacture and Automation Hangzhou 310032 China Fushun Mechanical Equipment Manufacturing Co. Ltd. Fushun 113006 China

ISBN: (纸本)0791842819

Considering reinforcement pad and the cylindrical shell as an integral model and a contact model, stress analysis for opening-reinforcement structures of a cylindrical shell is performed by elastic and elastoplastic FEM. By comparison of two sub-models and two material constitutive relations (elastic and elastoplastic), the stress distribution of cylindrical shell intersections by the contact model is similar to that by the integral model, but there are some differences of the stress at contact surfaces of the shell and the reinforcement pad between by the contact model and by the integral model. In general, the stress analysis of the integral model for pad reinforcement can approximately represent that of the contact model. Finite element analyses for different nozzle diameters and different oblique angles in nozzle and cylinder shell intersections are carried out. The stress distribution and the maximum stress are affected by oblique angle. But the difference of the maximum stress intensity among different diameters is small. Copyright © 2007 by ASME.

关键词： Pressure vessels

来源：评论

学校读者我要写书评

暂无评论

Application of a control vector parameterization method using an interior point algorithm

Application of a control vector parameterization method usin...

引用

27th IASTED International Conference on Modelling, Identification, and control

作者： Hirmajer, T. Fikar, M. Balsa-Canto, E. Banga, J.R. Institute of Information Engineering Automation and Mathematics Department of Information Engineering and Process Control Faculty of Chemical and Food Technology STU Radlinského 9 812 37 Bratislava Slovakia Spanish Council for Scientific Research C Eduardo Cabello 6 36208 Vigo Spain

ISBN: (纸本)9780889867116

This paper explores the possibilities of using the combination of the state of the art nonlinear programming problem solver IPOPT and the initial value problem solver CVODES (incorporated in SUNDIALS) for the solution of dynamic optimization problems, also regarded as open loop optimal control problems (OCP). Recent works confirm the potential of IPOPT in solving large scale optimization problems and particularly in solving optimal control problems in the framework of the complete parameterization approach [12]. Here the OCP problems are solved using the control vector parameterization scheme and the advantages and disadvantages of the combination CVP + IPOPT + CVODES are evaluated through several examples.

关键词： Ordinary differential equations

来源：评论

学校读者我要写书评

暂无评论

New Delay-dependent Absolute Stability Criteria for Lurie control Systems

引用

自动化学报 2008年第10期34卷 1275-1280页

作者： GAO Jin-Feng SU Hong-Ye JI Xiao-Fu CHU Jian Institute of Automation Zhejiang Sei-Teeh University Hangzhou 310018 P.R. China State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang Uni- versity Yuquan Campus Hangzhou 310027 P. R. China School of Electrical and Information Engineering Jiangsu University Zhen- jiang 212013 P. R. China

这笔记为时间延期 Lurie 控制系统涉及绝对稳定性分析，非线性在一个无限的扇区和有限扇区定位了。由使用新 Lyapunov-Krasovskii 功能那把整个延期间隔切成二个子区间并且在每个子区间和介绍一些上定义不同精力功能免费重量的矩阵，某... 详细信息

这笔记为时间延期 Lurie 控制系统涉及绝对稳定性分析，非线性在一个无限的扇区和有限扇区定位了。由使用新 Lyapunov-Krasovskii 功能那把整个延期间隔切成二个子区间并且在每个子区间和介绍一些上定义不同精力功能免费重量的矩阵，某新延期依赖者要用体力地绝对的稳定性标准以严格的线性矩阵不平等(LMI ) 被介绍。获得的延期依赖者标准不比以前的保守，作为被数字例子说明。

关键词：时间延迟稳定性自动化系统 Lurie控制系统

来源：评论

学校读者我要写书评

暂无评论

Design approach of weighting matrices for LQR based on multi-objective evolution algorithm

Design approach of weighting matrices for LQR based on multi...

引用

International Conference on Information and automation (ICIA)

作者： Yong Li Jianchang Liu Yu Wang Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang Liaoning China Department of Automatic Control Shenyang Institute of Aeronautical Engineering Shenyang Liaoning China

Aiming at the difficulty of designing weighting matrices for linear quadratic regulator (LQR), a multi-objective evolution algorithm (MOEA) based approach is proposed. The LQR weighting matrices, state feedback control rate and optimal controller are obtained by means of establishing the multi-objective optimization model of LQR weighting matrices and applying MOEA to it, which makes control system meet multiple performance indexes simultaneously. controller of double inverted pendulum system is designed using the proposed approach. Simulation results show that it has shorter adjusting time, smaller amplitude value deviating from steady-state than the pole assignment LQR weighting matrices design approach. So the validity of the proposed approach is confirmed.

关键词： Optimization Reactive power Performance analysis Genetic algorithms Mathematical model control systems Symmetric matrices

来源：评论

学校读者我要写书评

暂无评论

SLL: Relations to Kohonen SOMs

SLL: Relations to Kohonen SOMs

引用

IEEE Symposium on Position Location and Navigation (PLANS)

作者： Bruno Betoni Parodi Andrei Szabo Henning Lenz Joachim Bamberger Joachim Horn Corporate Technology Information and Communications Siemens AG Munich Germany Automation and Drives Advanced Technologies and Standards Process Automation Siemens AG Karlsruhe Germany Department of Electrical Engineering Institute for Control Engineering University of the Federal Armed Forces Hamburg Hamburg Germany

The simultaneous localization and learning (SLL) is an indoor localization technique based on existent radio communication networks. It originally takes received signal strength (RSS) as measured feature, used as input on an adaptive and iterative process based on Kohonen self organizing maps (SOMs) in order to learn and improve a feature map. The present paper points the main characteristics from both SLL and SOM, their differences and similarities. The somewhat generic formulation for SOMs acquire physical meanings with SLL that act as a constrainment, making the SLL a very particular case of SOM. The proofs for one dimensional SOMs are complemented by the proofs presented for the SLL by the authors in previous articles.

关键词： Calibration Position measurement Time measurement Iterative algorithms automation Self organizing feature maps Costs Communications technology control engineering Radio communication

来源：评论

学校读者我要写书评

暂无评论

New Delay-Dependent Criteria for Robust Stability of Uncertain Singular Systems

引用

IFAC Proceedings Volumes 2008年第2期41卷 2484-2489页

作者： Gao Jinfeng Su Hongye Ji Xiaofu Chu Jian State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Yuquan Campus Hangzhou 310027 P.R. China Institute of Automation Zhejiang Sci-Tech University Hangzhou 310018 P.R. China School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 P.R. China

This note concerns the delay-dependent robust stability analysis for uncertain singular time-delay systems. The parameter uncertainty is assumed to be norm-bounded and possibly time-varying, while the time delay considered here is assumed to be constant but unknown. By using a new Lyapunov-krasovskii functional which splits the whole delay interval into two subintervals and defines a different energy function on each subinterval, some delay-dependent conditions are presented for the singular time-delay system to be regular, impulse free and robustly stable. The obtained delay-dependent criteria are effective and less conservative than previous ones, which are illustrated by numerical examples.

关键词：

来源：评论

学校读者我要写书评

暂无评论

New Delay-dependent Absolute Stability Criteria for Lurie control Systems

引用

Acta Automatica Sinica 2008年第10期34卷 1275-1280页

作者： Jin-Feng GAO Hong-Ye SU Xiao-Fu JI Jian CHU Institute of Automation Zhejiang Sci-Tech University Hangzhou 310018 P. R. China State Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Yuquan Campus Hangzhou 310027 P. R. China School of Electrical and Information Engineering Jiangsu University Zhenjiang 212013 P. R. China

This note is concerned with the absolute stability analysis for time-delay Lurie control systems with nonlinearity located in an infinite sector and finite one. By using a new Lyapunov-Krasovskii functional that splits the whole delay interval into two subintervals and defines a different energy function on each subinterval and introducing some free-weighting matrices, some new delay-dependent robustly absolute stability criteria are presented in terms of strict linear matrix inequalities (LMIs). The obtained delay-dependent criteria are less conservative than previous ones, as are illustrated by numerical examples.

关键词： Lurie control system delay-dependent criterion absolute stability uncertainty linear matrix inequality (LMI)

来源：评论

学校读者我要写书评

暂无评论

Identification methods for experimental nonlinear modeling of combustion engines

Identification methods for experimental nonlinear modeling o...

引用

作者： Schreiber, Alexander Isermann, Rolf Laboratory of Control Engineering and Process Automation Institute of Automatic Control Darmstadt University of Technology Landgraf-Georg-Str. 4 D-64283 Darmstadt Germany

ISBN: (纸本)9783902661265

The optimized control of combustion engines with regard to minimized fuel consumption and emissions requires nonlinear models. Because of an increase of control inputs, like fuel mass flow, injection angle, exhaust gas recirculation flow and several outputs like torque, nitrogen oxides (NOx), hydrocarbons (HC) and particulates the classical grid-based measurement techniques take too long time and do not include dynamics. Therefore different measurement strategies for the stationary and dynamic behavior are described, like Design of Experiments (DoE) and use of suitable neural networks and Pseudo-Random-Binary-Signals (PRBS). As the structure of the models is not precisely known a-priori, nonlinear identification methods in form of special versions of neural networks are good candidates. Therefore, it will be shown how with special amplitude-modulated pseudo random binary signals (APRBS), simultaneous excitation of several input signals, nonlinear multi-input multi-output models can be obtained in relatively short time. Copyright © 2006 IFAC.

关键词： Nitrogen oxides

来源：评论

学校读者我要写书评

暂无评论

Experimental study on degradation of 1Cr5Mo steel tubes in the coking furnace at super temperature

Experimental study on degradation of 1Cr5Mo steel tubes in t...

引用

作者： Deming, Fang Ying, Li Baiyang, Lou Zhejiang University of Technology Institute of Process Equipment and Control Engineering MOE Key Laboratory of Mechanical Manufacture and Automation Hangzhou 310032 China

Microstructure, hardness and mechanical properties of the ICr5Mo steel tubes for the coking furnace at super temperature were investigated in this paper. It revealed that under super-temperature, oxidation corrosion for the furnace tubes was strengthened, wall thickness was evident thinner, pearlite in microstructure was spheroidised mostly, strength would be decreased and marked degradation in material occurred.

关键词： Coke fueled furnaces

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：