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Improved results on state estimation for neural networks with time-varying delays

控制理论与应用（英文版） 2010年第2期8卷 215-221页

作者： Tao LI 1 , Shumin FEI 2 , Hong LU 2 (1.School of Instrument Science & engineering, Southeast University, Nanjing Jiangsu 210096, China 2.key laboratory of measurement and control of complex systems of engineering, Ministry of Education, Southeast University, Nanjing Jiangsu 210096, China) School of Instrument Science & Engineering Southeast University Nanjing Jiangsu China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Southeast University Nanjing Jiangsu China

In this paper, some improved results on the state estimation problem for recurrent neural networks with both time-varying and distributed time-varying delays are presented. Through available output measurements, an improved delay-dependent criterion is established to estimate the neuron states such that the dynamics of the estimation error is globally exponentially stable, and the derivative of time-delay being less than 1 is removed, which generalize the existent methods. Finally, two illustrative examples are given to demonstrate the effectiveness of the proposed results.

关键词： Exponential state estimator Recurrent neural networks Exponential stability Time-varying delays Linear matrix inequality (LMI)

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The application and issuse of linear wireless sensor networks

The application and issuse of linear wireless sensor network...

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International Conference on System Science, engineering Design and Manufacturing Informatization (ICSEM)

作者： Zhengjie Wang Xiaoguang Zhao Xu Qian School of Mechanical Electronic & Info. Engineering China University of Mining & Technology (Beijing) Beijing China College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao China State Key Laboratory of Intelligent Control and Management of Complex Systems Chinese Academy of Sciences Beijing China

Wireless sensor networks consist of a large number of sensor nodes that have low power and limited transmission range and can be used in various scenario. The nodes can be deployed in the long and narrow region, such as road, bridge, tunnel and pipeline, to get some interesting information. The linear topology of these network application is different other application and have special feature, such as multi-hop, long delay, long distance and low reliability. This paper introduces the concept of linear wireless sensor networks and discusses the classification of topology and key issue of this network. The application of the linear wireless sensor network, such as road, bridge, tunnel and pipeline is presented. The research challenges are discussed at last in this paper.

关键词： Monitoring Reliability Collaboration Spread spectrum communication Hoses Topology Routing protocols

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Robustness of Cooperation on Highly Clustered Scale-Free Networks

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Chinese Physics Letters 2010年第3期27卷 9-12页

作者：丛睿仇原鹰陈小杰王龙 Key Lab of Electronic Equipment Structure (Ministry of Education) Xidian University Xi'an 710071 State Key Laboratory for Turbulence and Complex Systems Center for Systems and Control College of Engineering Peking Unfversity Beijing 100871

We study the effect of mutation on the evolutionary prisoner＇s dilemma in highly clustered scale-free networks. It is found that cooperation is more sensitive and vulnerable to strategy mutation in more highly clustered networks. For small mutation rates, high clustering coefficient promotes cooperation. For medium mutation rates, high clustering coefficient inhibits the emergence of cooperation. For large mutation rates, cooperation is insensitive to clustering property. We provide explanations for the effects of clustering on cooperation with varied mutation rates.

关键词： Computational physics Environmental and Earth science

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Stator flux oriented control with improved integrator for speed-sensorless induction motor drives

Stator flux oriented control with improved integrator for sp...

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2010 International Conference on E-Product E-Service and E-Entertainment, ICEEE2010

作者： Zhang, Hao Dai, Xianzhong Key Laboratory of Measurement and Control of Complex System of Engineering Ministry of Education Southeast University Nanjing China

ISBN: (纸本)9781424471614

This paper presents a speed-sensorless control algorithm for induction motors, based on the stator fluxoriented control. The algorithm has the advantage of insensitivity to rotor parameters and load varying, stator flux and rotor speed is closed loop controlled respectively. The main improvement is that stator flux is estimated based on a modified integrator which is developed to solve the problems associated with pure integrator. The performance of the proposed algorithm is verified using a dSPACE system with DS1103 controller board based on the digital signal processor (DSP) TMS320F240. The experimental results show the estimated speed is true of exactly actual speed and good behavior of the drive in both transient and steady state lowspeed operating conditions is proved. ©2010 IEEE.

关键词： Induction motors

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带马尔科夫跳的模态相关时变时滞随机系统的状态反馈控制器设计(英文)

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自动化学报 2010年第11期36卷 1601-1610页

作者：马莉达飞鹏吴凌尧 Key Laboratory of Measurement and Control for Complex Systems of Engineering Ministry of EducationResearch Institute of AutomationSoutheast University College of Electronic and Information Engineering Jiangsu University

In this paper,an improved mean-square exponential stability condition and delayed-state-feedback controller for stochastic Markovian jump systems with mode-dependent time-varying state delays are obtained. First,by constructing a modified Lyapunov-Krasovskii functional,a mean-square exponential stability condition for the above systems is presented in terms of linear matrix inequalities (LMIs). Here,the decay rate can be a finite positive constant in a range and the derivative of time-varying delays is only required to have an upper bound which is not required to be less than 1. Then,based on the proposed stability condition,a delayed-state-feedback controller is designed. Finally,numerical examples are presented to illustrate the effectiveness of the theoretical results.

关键词：马尔科夫跳模态相关时变时滞随机系统状态反馈控制器

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Supervisory and energy management system of large public buildings

Supervisory and energy management system of large public bui...

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International Conference on Mechatronics and Automation

作者： Ma, Xudong Cui, Ran Sun, Yu Peng, Changhai Wu, Zhishen Key Lab. of Measurement and Control of Complex Systems of Engineering School of Automation Southeast University Nanjing 210096 China International Institute for Urban Systems Engineering Southeast University Nanjing 210096 China

ISBN: (纸本)9781424451418

Buildings are important contributors to energy consumption accounting for around one-third of energy consumed in cities, where large public buildings are the dominant energy consumers and energy consumption might be significantly decreased through Building Energy Management systems (BEMS). A supervisory and management system for energy conservation in large public buildings is presented in this paper, with a PC or a embedded computer system running a BEMS software designed to connected to distributed energy metering system, wireless sensor networks, even conventional building automation (BA) systems. The supervisory and management software consists of information inquiry, energy consumption metering, energy efficiency analysis and decision support subsystems. The system framework is introduced with development and application of the software described in detail. © 2010 IEEE.

关键词： Energy utilization

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Robust Exponential Admissibility of Uncertain Switched Singular Time-delay systems

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自动化学报 2010年第12期36卷 1773-1779页

作者： LIN Jin-Xing FEI Shu-Min Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast UniversityNanjing 210096P.R.China College of Automation Nanjing University of Posts and TelecommunicationsNanjing 210003P.R.China

This paper investigates the problem of robust exponential admissibility for a class of continuous-time uncertain switched singular systems with interval time-varying delay. By defining a properly constructed decay-rate-dependent Lyapunov function and the average dwell time approach, a delay-range-dependent sufficient condition is derived for the nominal system to be regular, impulse free, and exponentially stable. This condition is also extended to uncertain case. The obtained results provide a solution to one of the basic problems in continuous-time switched singular time-delay systems, that is, to identify a switching signal for which the switched singular time-delay system is regular, impulse free, and exponentially stable. Numerical examples are given to demonstrate the effectiveness of the obtained results.

关键词：自动化系统自动信息函数开关

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Impulsive controller Design for Networked Impulsive control systems with Transmission Delay and Packet Dropouts

Impulsive Controller Design for Networked Impulsive Control ...

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The 22nd China control and Decision Conference(2010年中国控制与决策会议)

作者： Xianlin Zhao Shumin Fei Nanjing Agricultural University Nanjing 210031 China Key Laboratory of Measurement and Control ofC Key Laboratory of Measurement and Control ofComplex Systems of Engineering Ministry of Education So

This paper considers the problem of controller design fornetworked impulsive control systems(NICSs) with transmission delayand packet dropouts. The parameter uncertainty is assumed to be norm bounded. The problem to be addressed is the design of impulsive controllers such that the exponential stability of the resulting closed-loop system and asymptotical stability for admissible uncertainties are guaranteed. By applying Lyapunov function theory and Halanay Lemma, impulsive time-delay controller is derived through solving LMIs. Numerical examples are provided to demonstrate the application of the proposed method.

关键词： NICS Exponential Stability Robust control Packet Dropout Paper

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New type of adaptive control for a class of distributed time-delay systems with adaptation regard to delay parameter

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Journal of systems engineering and Electronics 2010年第6期000卷 1054-1062页

作者： Lin Chai Shumin Fei Haiyan Jin Ruimin Wang Yanhong Li Key Laboratory of Measurement and Control of Complex Systems of Engineering Southeast UniversityNanjing 210096P.R.China School of Automation Southeast UniversityNanjing 210096P.R.China

The problem on stabilization for the system with distributed delays is researched. The distributed time-delay under consideration is assumed to be a constant time-delay, but not known exactly. A design method is proposed for a memory proportional and integral (PI) feedback controller with adaptation to distributed time-delay. The feedback controller with memory simultaneously contains the current state and the past distributed information of the addressed systems. The design for adaptation law to distributed delay is very concise. The controller can be derived by solving a set of linear matrix inequalities (LMIs). Two numerical examples are given to illustrate the effectiveness of the design method.

关键词： distributed delay linear matrix inequality (LMI) adaptive control time-delay systems memory PI feedback

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Stator Flux Oriented control with Improved Integrator for Speed-Sensorless Induction Motor Drives

Stator Flux Oriented Control with Improved Integrator for Sp...

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International Conference on E-Product E-Service and E-Entertainment

作者： Hao Zhang Xianzhong Dai Key Laboratory of Measurement and Control of Complex system of Engineering Ministry of Education South-East University Nanjing China

ISBN: (纸本)9781424471591

This paper presents a speed-sensorless control algorithm for induction motors, based on the stator flux-oriented control. The algorithm has the advantage of insensitivity to rotor parameters and load varying, stator flux and rotor speed is closed loop controlled respectively. The main improvement is that stator flux is estimated based on a modified integrator which is developed to solve the problems associated with pure integrator. The performance of the proposed algorithm is verified using a dSPACE system with DS1103 controller board based on the digital signal processor (DSP) TMS320F240. The experimental results show the estimated speed is true of exactly actual speed and good behavior of the drive in both transient and steady state low-speed operating conditions is proved.

关键词： Stators Rotors Induction motors Inductance Resistance Observers

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