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American control Conference

作者： Heng Li Jun Peng Weirong Liu Jing Wang Jiangang Liu Zhiwu Huang School of Information Science and Engineering Central South University Hunan Engineering Laboratory for Advanced Control and Intelligent Automation Changsha 410075 China Computer Engineering Program Bethune-Cookman University Daytona Beach FL 32114 USA

ISBN: (纸本)9781479901777

In this paper, we consider the flocking control and communication optimization problem for multi-agent systems in a realistic communication environment. In flocking control, it is common to specify the formation by setting the separation distance between neighboring agents and then design the control to maintain the desired formation. However, since communication quality will generally change during flocking in a physical environment, a predefined separation distance might not always be the desired communication distance. In this paper, a distributed scheme integrating potential function and extremum seeking algorithm is proposed to obtain the desired separation distance between neighboring agents in real time. A comprehensive performance index related to the environment is proposed, which captures a trade-off between formation tasks and communication quality. Since it is difficult to calculate the gradient of the performance in physical environments, an adaptive model-free extremum seeking algorithm is designed to solve for the optimal separation distances, which calls for no knowledge of the gradient of performance function. We illustrate the proposed method through simulations.

关键词： Communication Optimization multi-agent systems realistic communication environment Multi-agent systems FLOCKING communication quality extremum seeking algorithm communication distance Standing Orders Gradient potential function

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Robust H∞ control with partly quantized information

Robust H∞ control with partly quantized information

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Chinese control Conference (CCC)

作者： Yang Ge Jingcheng Wang Kang Li Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai CN School of Electronics Electrical Engineering and Computer Science Queen's University Belfast Belfast Belfast GB

This paper is concerned with the stability and stabilizability problems of networked control systems (NCSs) with partly quantized information. More precisely, the remote state variables transported from other sub-systems experience quantization errors, while the local state variables do not. This consideration is much more natural in NCSs due to the distributive nature of subsystems. Quantization errors are represented as convex poly-topic uncertainties. Based on the Lyapunov-Krasovskii (L-K) functional approach, sufficient conditions for the existence of a quantized robust H∞ state feedback controller for NCSs are presented. Such conditions are obtained in terms of bilinear matrix inequalities (BMIs). Furthermore, a cone complementarity algorithm is utilized to convert these BMIs into a convex optimization problem. Finally, a simulation example is provided to demonstrate the efficiency of proposed theorems.

关键词： Quantization (signal) Hafnium State feedback Linear matrix inequalities Stability analysis Networked control systems Uncertainty

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H_∞ filtering with Diagonal Interacting Multiple Model Algorithm for Maneuvering Target Tracking

H_∞ filtering with Diagonal Interacting Multiple Model Algo...

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American control Conference

作者： X. Fu Y. Jia J. Du J. Zhang W. Li X. Liu Seventh Research Division and the Department of Systems and Control Beihang University (BUAA) Beijing Key Laboratory of Intelligent Telecommunication Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunication school of Electronic and Information Engineering Beihang University (BUAA) Department of Automatic Beijing Information and Science of University

ISBN: (纸本)9781479901777

This paper is devoted to the problem of state estimate of discrete-time stochastic systems with Markov jump parameters. A robust algorithm-diagonal interacting multiple model algorithm based on H_∞ filtering (DIMMH) is presented for maneuvering target tracking when measurement noise is of unknown statistics. Extensive Monte Carlo simulations show the effectiveness and superiority of the proposed algorithm.

关键词： Maneuvering Target Tracking Markov jump parameters effectiveness Target tracking maneuvering target State estimation Filtration tracking Noise measurement Diagonal Monte Carlo technique

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control of gold nanoparticles based on circular DNA strand displacement

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Journal of colloid and interface science 2014年 418卷 31-6页

作者： Cheng Zhang Jingjing Ma Jing Yang Yafei Dong Jin Xu Institute of Software School of Electronics Engineering and Computer Science Key Laboratory of High Confidence Software Technologies of Ministry of Education Peking University No. 5 Yiheyuan Road Haidian District Beijing 100871 People's Republic of China. Electronic address: zhangcheng369@***. Institute of Software School of Electronics Engineering and Computer Science Key Laboratory of High Confidence Software Technologies of Ministry of Education Peking University No. 5 Yiheyuan Road Haidian District Beijing 100871 People's Republic of China. Electronic address: casy-20@***. School of Control and Computer Engineering North China Electric Power University No. 2 Beinong Road Huilongguan Changping District Beijing 102206 People's Republic of China. Electronic address: yangjing369@***. College of Life Science Shaanxi Normal University 199 South Chang'an Road Xi'an 710062 People's Republic of China. Electronic address: dongyf@***. Institute of Software School of Electronics Engineering and Computer Science Key Laboratory of High Confidence Software Technologies of Ministry of Education Peking University No. 5 Yiheyuan Road Haidian District Beijing 100871 People's Republic of China. Electronic address: DNA@***.

In this study, DNA strand displacement is utilized to control the aggregation of DNA/gold nanoparticles (AuNPs) based on circular DNA, in which DNA/AuNP conjugates are captured and released by adding different DNA signal strands. Using this strategy, single DNA/nanoparticle building blocks are capable of assembling into complex structures of two and three circular DNA/nanoparticles. The existence of these structures is demonstrated by gel electrophoresis and transmission electron microscopy (TEM) analysis. This advance has potential applications in controlling, transporting and detecting DNA/AuNP conjugates with subsequent manipulation of the structure and function of these assemblies.

关键词： Circular DNA DNA self-assembly DNA strand displacement Gold nanoparticles TEM image

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Optimum weight selection based LQR formulation for the design of fractional order PIλDμ controllers to handle a class of fractional order systems

Optimum weight selection based LQR formulation for the desig...

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International Conference on computer Communication and Informatics (ICCCI)

作者： Saptarshi Das Indranil Pan Kaushik Halder Shantanu Das Amitava Gupta Department of Power Engineering Jadavpur University Kolkata India Communications Signal Processing and Control Group School of Electronics and Computer Science University of Southampton Southampton UK Department of Electronics and Instrumentation Engineering National Institute of Science and Technology Berhampur Orissa India Reactor Control Division Bhabha Atomic Research Centre Mumbai India

ISBN: (纸本)9781467329064

A weighted summation of Integral of Time Multiplied Absolute Error (ITAE) and Integral of Squared controller Output (ISCO) minimization based time domain optimal tuning of fractional-order (FO) PID or PI λ D μ controller is proposed in this paper with a Linear Quadratic Regulator (LQR) based technique that minimizes the change in trajectories of the state variables and the control signal. A class of fractional order systems having single non-integer order element which show highly sluggish and oscillatory open loop responses have been tuned with an LQR based FOPID controller. The proposed controller design methodology is compared with the existing time domain optimal tuning techniques with respect to change in the trajectory of state variables, tracking performance for change in set-point, magnitude of control signal and also the capability of load disturbance suppression. A real coded genetic algorithm (GA) has been used for the optimal choice of weighting matrices while designing the quadratic regulator by minimizing the time domain integral performance index. Credible simulation studies have been presented to justify the proposition.

关键词： Tuning Time domain analysis Regulators Minimization Performance analysis Process control Genetic algorithms

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An empirical analysis of social interaction on tobacco-oriented social networks

An empirical analysis of social interaction on tobacco-orien...

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2013 International Conference for Smart Health, ICSH 2013

作者： Liang, Yunji Zheng, Xiaolong Zeng, Daniel Dajun Zhou, Xingshe Leischow, Scott School of Computer Science Northwestern Polytechnical University Xi'an China Department of Management Information System University of Arizona Tucson AZ United States State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Dongguan Research Institute of CASIA Cloud Computing Center Chinese Academy of Sciences Songshan Lake Dongguan China Mayo Clinic in Arizona Phoenix AZ United States

ISBN: (纸本)9783642398438

Social media is widely utilized in the tobacco control campaigns. It is a great challenge to evaluate the efficiency of tobacco control policies on social network sites and find gaps among tobacco-oriented social networks. In this paper, we construct three tobacco-oriented social networks according to user interaction on Facebook tobacco-related fan pages. We further investigate the interaction patterns including temporal distribution and interaction patterns to reveal the differences of tobacco-oriented social networks. Our empirical analysis demonstrates that: 1) the user interaction on the pro-tobacco fan pages is more active. Fan pages for tobacco promotion are more successful in obtaining more user attention. 2) The gap between tobacco promotion and tobacco control is widening. These empirical results can provide us significant insights into understanding the evolutionary patterns of social interaction in tobacco-oriented social networks and further help the government departments of tobacco control to make reasonable decisions. © 2013 Springer-Verlag.

关键词： Tobacco

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An improved parameterized approach for real time optimal motion planning of AUV moving in dynamic environment

An improved parameterized approach for real time optimal mot...

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IEEE Conference on Robotics, Automation and Mechatronics

作者： Wenhao Luo Jun Peng Jing Wang Department of Automation Key Laboratory of System Control And Information Processing Shanghai China School of Information Science and Engineering Hunan Engineering Laboratory Changsha China Computer Engineering Program Bethune-Cookman University Daytona Beach FL USA

In this paper, we present an improved analytic method to the optimal trajectory generation of an autonomous underwater vehicle (AUV) in a dynamic environment. The proposed approach explicitly incorporates both the AUV kinematic and the geometric constraints due to dynamic obstacles and the terrain while rendering the near-shortest path by a performance index related to the path length. In particular, the proposed design is based on a family of parameterized trajectories determined by three adjustable parameters, which provides a unified way to reformulate the geometric constraints and performance index into a set of parameterized constraint equations. To that end, such a constrained optimization problem boils down to optimize those adjustable parameters, which can be analytically solved in the parameter space. The proposed solution enhances the methodologies of real-time path planning for robots in 3D environment. Simulation results verify the effectiveness of the proposed method.

关键词： Trajectory Planning Vehicle dynamics Dynamics Collision avoidance Kinematics Optimization

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Pitch control for a constant-speed wind turbine using equivalent-input-disturbance approach

Pitch control for a constant-speed wind turbine using equiva...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： Jie Zhang Jinhua She Ryuichi Yokoyama Yicheng Zhou Min Wu Graduate School of Environment and Energy Engineering Waseda University Shinjuku-ku Tokyo Japan School of Computer Science Tokyo University of Technology Hachioji Tokyo Japan Fujitsu Limited Ota-ku Tokyo Japan School of Information Science and Engineering and Hunan Engineering Laboratory for Advanced Control and Intelligent Automation Central South University Changsha China

ISBN: (纸本)9781467353199

As the penetration level of wind energy is increasing, it is becoming more and more important that the output of a wind turbine is stabilized at a prescribed value under a turbulence environment. And this is crucial to guarantee the stability of the power grid. A pitch-controlled constant-speed wind turbine is widely used due to the low cost and reliability. The output power is regulated by adjusting its pitch angle. This paper describes a pitch control method that uses the equivalent-input-disturbance (EID) approach for the control of the pitch angle of a constant-speed wind turbine. An equivalent input disturbance, which has the same effect on the produced power as the wind disturbance does, is estimated by an EID estimator. And it is used to eliminate the effect of the wind disturbance. Simulations show the effectiveness of this method.

关键词： Wind turbines Wind speed Rotors Observers Pi control Actuators

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On eigenvalue-eigenvector assignment for componentwise ultimate bound minimisation in MIMO LTI discrete-time systems

On eigenvalue-eigenvector assignment for componentwise ultim...

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Australian control Conference (AUCC)

作者： Rahmat Heidari Maria M. Seron Julio H. Braslavsky Priority Research Centre for Complex Dynamic Systems and Control School of Electrical Engineering and Computer Science The University of Newcastle Callaghan NSW Australia Division of Energy Technology Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO) Newcastle NSW Australia

We consider eigenvalue-eigenvector assignment in order to minimise ultimate bounds on the states of a linear time-invariant (LTI) discrete-time system in the presence of non-vanishing bounded disturbances. As opposed to continuous-time systems, for which eigenstructure assignment with large magnitude stable eigenvalues can yield arbitrarily small ultimate bounds for “matched” perturbations, for discrete-time systems, ultimate bounds cannot be smaller than certain values depending on the disturbance bounds. Moreover, these smallest bounds are not achievable, in general, by assigning the closed-loop eigenvalues to zero (an intuitive conjecture that parallels the continuous-time case). The first contribution of the paper, for single-input systems, are conditions on the zeros of the transfer function between the control input and a state to minimise the ultimate bound corresponding to that state. These conditions generalise a result recently presented by the authors. The second, and main, contribution of the current paper is to characterise, for multiple-input systems, the eigenstructure of the closed-loop system so that some ultimate bounds are minimised to their minimum values. The number of ultimate bound components that can be minimised is constrained by the number of control inputs. For m-input system, the minimisation problem of m - 1 ultimate bound components can be solved without restrictions, while in order to minimise an additional bound, an additional restrictive condition should be satisfied.

关键词： Eigenvalues and eigenfunctions Vectors Minimization Discrete-time systems Polynomials Zinc Australia

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High speed motion control system based on predictive observer

High speed motion control system based on predictive observe...

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International Conference on Information and Automation (ICIA)

作者： Lei Zhou Jiangang Li Wennong Zhang Zexiang Li Shenzhen Graduate School Harbin Institute of Technology Shenzhen China Institute of Motion Control Technology Googol Technology Company Limited Shenzhen China Department of Electronic & Computer Engineering Hong Kong University of Science and Technology Kowloon Hong Kong

ISBN: (纸本)9781479913329

Phase lags limit loop gains and ultimately reduce the responsiveness of the high speed motion control system. We propose a predictive position and velocity observer. The predictive observer can provide a significant phase lead therefore the controller can be designed as if the control system does not have these phase lag elements. The implementation and tuning steps of the observer is also introduced. The simulations verify that the proposed observer can significantly improve the performance of the motion control system.

关键词： Observers Tuning Motion control Transfer functions Bandwidth Noise Delay effects

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