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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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Consensus of multi-agent systems with time-varying delay

Consensus of multi-agent systems with time-varying delay

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IEEE Conference on Decision and control

作者： Huiyang Liu Guangming Xie Long Wang Center of Systems and Control State Key Laboratory of Turbulence and Complex Systems College of Engineering Peking University Beijing China

ISBN: (纸本)9781424477456

This paper provides consensus analysis for networked continuous-time multi-agent systems via sampled control. The sampled control protocol is induced from a continuous-time consensus protocol by using periodic sampling technology and zero-order hold circuit. Meanwhile, time-varying delay that can be both smaller and larger than the sampling interval is taken into account. Based on graph theory and stability theory, a sufficient condition is proposed to guarantee the consensus achievement under the condition that communication channels suffer from time-varying delay. The main contribution of this paper is to provide a valid distributed consensus algorithm that explicitly describes which state information may be received in the concerning sampling interval. The results are illustrated by some simulations.

关键词： Delay Nickel Multiagent systems Protocols control systems Switched systems Stability analysis

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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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IEEE International Conference on Mechatronics and Automation

作者： Xudong Ma Ran Cui Yu Sun Changhai Peng Zhishen Wu Key Lab of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation South-East University Nanjing China International Institute for Urban Systems Engineering South-East University Nanjing China

关键词： Buildings Energy consumption Sensors Monitoring Wireless sensor networks Lighting Software

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Effects of heterogeneous wealth distribution on public cooperation with collective risk

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Physical Review E 2010年第1期82卷 016102-016102页

作者： Jing Wang Feng Fu Long Wang Center for Systems and Control State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China Program for Evolutionary Dynamics Harvard University One Brattle Square Cambridge Massachusetts 02138 USA

The distribution of wealth among individuals in real society can be well described by the Pareto principle or “80-20 rule.” How does such heterogeneity in initial wealth distribution affect the emergence of public cooperation, when individuals, the rich and the poor, engage in a collective-risk enterprise, not to gain a profit but to avoid a potential loss? Here we address this issue by studying a simple but effective model based on threshold public goods games. We analyze the evolutionary dynamics for two distinct scenarios, respectively: one with fair sharers versus defectors and the other with altruists versus defectors. For both scenarios, particularly, we in detail study the dynamics of the population with dichotomic initial wealth—the rich versus the poor. Moreover, we demonstrate the possible steady compositions of the population and provide the conditions for stability of these steady states. We prove that in a population with heterogeneous wealth distribution, richer individuals are more likely to cooperate than poorer ones. Participants with lower initial wealth may choose to cooperate only if all players richer than them are cooperators. The emergence of pubic cooperation largely relies on rich individuals. Furthermore, whenever the wealth gap between the rich and the poor is sufficiently large, cooperation of a few rich individuals can substantially elevate the overall level of social cooperation, which is in line with the well-known Pareto principle. Our work may offer an insight into the emergence of cooperative behavior in real social situations where heterogeneous distribution of wealth among individual is omnipresent.

关键词： Pareto principle

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Evolutionary dynamics of public goods games with diverse contributions in finite populations

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Physical Review E 2010年第5期81卷 056103-056103页

作者： Jing Wang Bin Wu Xiaojie Chen Long Wang Center for Systems and Control State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China Max-Planck-Institute for Evolutionary Biology August-Thienemann-Str. 2 24306 Plön Germany

The public goods game is a powerful metaphor for exploring the maintenance of social cooperative behavior in a group of interactional selfish players. Here we study the emergence of cooperation in the public goods games with diverse contributions in finite populations. The theory of stochastic process is innovatively adopted to investigate the evolutionary dynamics of the public goods games involving a diversity of contributions. In the limit of rare mutations, the general stationary distribution of this stochastic process can be analytically approximated by means of diffusion theory. Moreover, we demonstrate that increasing the diversity of contributions greatly reduces the probability of finding the population in a homogeneous state full of defectors. This increase also raises the expectation of the total contribution in the entire population and thus promotes social cooperation. Furthermore, by investigating the evolutionary dynamics of optional public goods games with diverse contributions, we find that nonparticipation can assist players who contribute more in resisting invasion and taking over individuals who contribute less. In addition, numerical simulations are performed to confirm our analytical results. Our results may provide insight into the effect of diverse contributions on cooperative behaviors in the real world.

关键词： Random processes

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