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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Li Ma Fei-Peng Da Kan-Jian Zhang Key Laboratory of Measurement and Control for Complex Systems of Engineering Ministry of EducationSoutheast University

In this paper,the mean-square exponential stability problem is investigated for stochastic Markovian jump open-loop systems with mode-dependent time-varying *** constructing a modified Lyapunov-Krasovskii functional,a delay-dependent sufficient condition for the solvability of the above problem is presented in terms of linear matrix inequalities（LMIs）.The decay rate can be a given finite positive constant and synchronously the derivative of time-varying delays is only required to have a upper bound which is not required to be less than *** examples are presented to illustrate the effectiveness of the theoretical result.

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Modified Particle Filter for Object Tracking in Low Frame Rate Video

Modified Particle Filter for Object Tracking in Low Frame Ra...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Tao Zhang Shumin Fei Hong Lu Xiaodong Li the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationInstitute of AutomationSoutheast University the Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education Institute of AutomationSoutheast University School of Automation Nanjing Institute of Technology

Object tracking algorithm using modified Particle filter in low frame rate(LFR) video is proposed in this paper,which the object moving significantly and randomly between consecutive frames in the low frame rate ***,Particle filtering use motion transitions to model the movement of the ***,in object tracking with low frame rate sequences,it is very difficult to model significant random jumps of *** key notion of our solution is that using the object detection and extraction to locate the tracked object,while not using the dynamical *** propagate the sample set around the detected regions,which the samples are assumed to be uniformly distributed in the neighborhoods of the detected *** is similar to the general particle filter to propagate *** we compute the likelihood between the target model and the candidate regions,which are based on color histogram *** extensive experiments show that the proposed algorithm performs robustly in a large variety of tracking scenarios.

关键词： frame filter Modified Particle Filter for Object Tracking in Low Frame Rate Video Object Filter

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The number of leaders needed for consensus

The number of leaders needed for consensus

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IEEE Conference on Decision and control

作者： Zhixin Liu Jing Han Xiaoming Hu Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy and Sciences Beijing China Optimization and Systems Theory Royal Institute of Technology Stockholm Sweden

ISBN: (纸本)9781424438716

In order to have a self-organized multi-agent system exhibit some expected collective behavior, it is necessary that some agents (called leaders) are informed about the expected behavior and able to intervene. Then a fundamental question is: how many such leaders are needed? Naturally the answer depends on the model used. In this paper the model proposed by Vicsek et al. is used for the analysis. By analyzing the system dynamics and estimating the characteristics of the initial neighbor graph, a lower bound on the ratio of leaders is provided that guarantees the expected consensus being reached almost surely.

关键词： Multiagent systems control systems Content addressable storage Biological system modeling Biological systems Marine animals Educational institutions Laboratories Mathematics Intelligent agent

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Partner switching stabilizes cooperation in coevolutionary prisoner’s dilemma

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Physical Review E 2009年第3期79卷 036101-036101页

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

Previous studies suggest that cooperation prevails when individuals can switch their interaction partners quickly. However, it is still unclear how quickly individuals should switch adverse partners to maximize cooperation. To address this issue, we propose a simple model of coevolutionary prisoner’s dilemma in which individuals are allowed to either adjust their strategies or switch their defective partners. Interestingly, we find that, depending on the game parameter, there is an optimal tendency of switching adverse partnerships that maximizes the fraction of cooperators in the population. We confirm that the stabilization of cooperation by partner switching remains effective under some situations, where either normalized or accumulated payoff is used in strategy updating, and where either only cooperators or all individuals are privileged to sever disadvantageous partners. We also provide an extended pair approximation to study the coevolutionary dynamics. Our results may be helpful in understanding the role of partner switching in the stabilization of cooperation in the real world.

关键词： Stabilization

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Partner selections in public goods games with constant group size

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Physical Review E 2009年第2期80卷 026121-026121页

作者： Te Wu 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 Cambridge Massachusetts 02138 USA

Most of previous studies concerning the public goods game assume either participation is unconditional or the number of actual participants in a competitive group changes over time. How the fixed group size, prescribed by social institutions, affects the evolution of cooperation is still unclear. We propose a model where individuals with heterogeneous social ties might well engage in differing numbers of public goods games, yet with each public goods game being constant size during the course of evolution. To do this, we assume that each focal individual unidirectionally selects a constant number of interaction partners from his immediate neighbors with probabilities proportional to the degrees or the reputations of these neighbors, corresponding to degree-based partner selection or reputation-based partner selection, respectively. Because of the stochasticity the group formation is dynamical. In both selection regimes, monotonical dependence of the stationary density of cooperators on the group size was found, the latter over the whole range but the former over a restricted range of the renormalized enhancement factor. Moreover, the reputation-based regime can substantially improve cooperation. To interpret these differences, the microscopic characteristics of individuals are probed. We later extend the degree-based partner selection to general cases where focal individuals have preferences toward their neighbors of varying social ties to form groups. As a comparison, we as well investigate the situation where individuals locating on the degree regular graphs choose their coplayers at random. Our results may give some insights into better understanding the widespread teamwork and cooperation in the real world.

关键词： Condensed matter physics

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Consensus of High Order Linear Multi-agent systems Using Output Error Feedback

Consensus of High Order Linear Multi-agent Systems Using Out...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Jinhuan Wang Zhixin Liu Xiaoming Hu School of Sciences Hebei University of Technology Optimization and Systems Theory and ACCESS Linnaeus Center Royal Institute of Technology Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences

In this paper,we study the consensus problem of multi-agent systems in which each agent adopts the same linear model that can be of any *** consider the case where only the relative output error between the neighboring agents can be *** order to solve the consensus problem,two kinds of decentralized control laws are *** first show that a static output error feedback control can solve the consensus problem if some further constraints on the system model is *** we use an observer based approach to design a dynamic output error feedback consensus *** note that with the observer based approach,some information exchange between the agents is needed unless the associated adjacent graph is completely connected.

关键词： Consensus of High Order Linear Multi-agent systems Using Output Error Feedback agent

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Scene specified control for internet-based mobile robot operation

Scene specified control for internet-based mobile robot oper...

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IEEE International Conference on Mechatronics and Automation

作者： Xudong Ma Xianzhong Dai Fang Fang Ningting Cheng Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation South East University Nanjing China

A networked mobile robot in large networks such as Internet often operates under supervisory control and the discrete commands and decisions from the remote operators normally depend on the feedback scene information. Therefore it must be tolerate of the significant and unpredicted time latency that might mislead the robot for time and scene-dependent operations. A series of strategies are presented in this paper to decrease the latency impact and implement scene specified control of a Internet-based mobile robot. Time stamps are attached to each communication packet of scene video, audio and environment information from the robot to remote operator's computer for display, which then sends back control decision or command of the right time stamps with the scene when needed. By allocating a memory buffer for current display and recent status even including video frames the robot recalls the environment with the event time stamps as searching index, which helps to estimate the exact robot position or operation. Reverse position and motion are conducted according to estimation from the memorized information. The strategies have been introduced to improve a practical networked mobile robot control platform with experiment validity given in detail.

关键词： Layout Internet Mobile robots Computer displays Delay Communication system control Auditory displays IP networks Supervisory control Feedback

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Design and Simulation of the Tire Pressure Sensor Based on the SAW Resonator and the Tire Capacitor Impedance

Design and Simulation of the Tire Pressure Sensor Based on t...

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IEEE Intelligent Vehicles Symposium (IV)

作者： Xiangwen Zhang Fei-Yue Wang College of Computer and Control Guilin University of Electronic Technology Key Laboratory of Complex Systems and Intelligence Science Chinese Academy of Sciences

ISBN: (纸本)9781424435036

A novel tire pressure sensor based on the SAW resonator and the tire capacitor impedance was researched, and the sensor can measure the tire pressure wirelessly and passively according to the relation between the tire pressure and the tire capacitor impedance and the relation between the tire capacitor impedance and the resonant frequency of the sensor circuit. The novel sensor structure was introduced, and four L type, five T type and five π type sensor circuit structures were analyzed and their frequency characteristics were simulated. The simulation results show that the T1～T5, π1, π2, π4 and π5 type sensor circuit structures are suitable for the tire pressure sensor, and the performance of the T3 type sensor circuit structure is the best among them. The sensitivities of the sensor were calculated and the best sensor circuit was designed according to the simulation and analysis results.

关键词： surface acoustic wave resonators TIRE PRESSURE Sensors Capacitors simulating impedance

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Emergence of social cooperation in threshold public goods games with collective risk

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Physical Review E 2009年第1期80卷 016101-016101页

作者： Jing Wang Feng Fu Te Wu 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

In real situations, people are often faced with the option of voluntary contribution to achieve a collective goal, for example, building a dam or a fence, in order to avoid an unfavorable loss. Those who do not donate, however, can free ride on others’ sacrifices. As a result, cooperation is difficult to maintain, leading to an enduring collective-risk social dilemma. To address this issue, here we propose a simple yet effective theoretical model of threshold public goods game with collective risk and focus on the effect of risk on the emergence of social cooperation. To do this, we consider the population dynamics represented by replicator equation for two simplifying scenarios, respectively: one with fair sharers, who contribute the minimum average amount versus defectors and the other with altruists contributing more than average versus defectors. For both cases, we find that the dilemma is relieved in high-risk situations where cooperation is likely to persist and dominate defection in the population. Large initial endowment to individuals also encourages the risk-averse action, which means that, as compared to poor players (with small initial endowment), wealthy individuals (with large initial endowment) are more likely to cooperate in order to protect their private accounts. In addition, we show that small donation amount and small threshold (collective target) can encourage and sustain cooperation. Furthermore, for other parameters fixed, the impacts of group size act differently on the two scenarios because of distinct mechanisms: in the former case where the cost of cooperation depends on the group size, large size of group readily results in defection, while easily maintains cooperation in the latter case where the cost of cooperation is fixed irrespective of the group size. Our theoretical results of the replicator dynamics are in excellent agreement with the individual based simulation results.

关键词： cooperation mechanisms simulation results Dilemma Simulation results Endowments Group Size zero fare public goods Threshold Replication Origin Emergence group cooperation

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Finite-time tracking control of bank-to-turn missiles using terminalsliding mode

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ICIC Express Letters 2009年第4期3卷 1373-1380页

作者： Wang, Zhao Li, Shihua Fei, Shumin Key Laboratory of Measurement and Control of Complex Systems ofEngineering School of Automation Southeast University Nanjing 210096 China College of Information and Control Engineering China University of Petroleum Dongying 257061 China

In this paper, a finite-time controller for bank-to-turn (BTT,) missiles isdesigned based on nonsingular terminal sliding mode (NTSM,) technique. Theproposed controller allows that roll rate and angle of attack can track thedesired commands in finite-time with sideslip angle maintained in a small degreerange. Input/output (I/O) feedback linearizaiton technique is used in thecontroller design. Since the dynamics of BTT missile contains uncertainties,nonsingular terminal sliding mode control technique is applied to yield betterrobustness and disturbance rejection properties. Computer simulation results arepresented to validate the effectiveness of our method. ICIC International © 2009.

关键词： Disturbance rejection

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