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Chinese control Conference (CCC)

作者： Wen-yi Lin Yong Gu Lei Xie State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China

Closed-loop subspace identification methods have enjoyed tremendous development in last decade. This paper presents a novel method combined with KPLS, aiming at the situation without persistence of excitation. In this method, KPLS is utilized to obtain Markov parameters, then, state sequence is estimated by SVD decomposition. Based on the estimated state sequence, the model parameters are estimated by linear regression. 30 Monte Carlo simulation examples are presented in the end of the paper, the results are shown to be competitive and robust in the situation without persistence of excitation in MIMO system, and the new method is more applicable for process industry.

关键词： Monte Carlo methods Markov processes MIMO Electronic mail Least squares methods Reactive power Laboratories

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controllability analysis of Networked control systems with packets loss

Controllability analysis of Networked Control Systems with p...

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Chinese control Conference (CCC)

作者： Hong Lin Hongye Su Yong Xu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou Zhejiang CN

The problem of controllability and control strategy for a class of Networked control systems (NCSs) with packets loss are studied in this paper. A probabilistic controllability conception is proposed for these systems. In order to analyze the probabilistic controllability and relevant properties, a representation of the initial state by a group of constructive base of linear space is introduced. Based on this representation the affects to control system caused by packets loss can be expressed by system substates. A control strategy is developed to guarantee, the controllability of NCSs, and the minimum control steps property of this control strategy is discussed as well. Finally, a necessary and sufficient condition of probabilistic controllability for NCSs with packets loss is represented.

关键词： Packet loss controllability Sufficient conditions Networked control systems Probabilistic logic

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Contagion dynamics in time-varying metapopulation networks

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Physical Review E 2013年第3期87卷 032805-032805页

作者： Su-Yu Liu Andrea Baronchelli Nicola Perra State Key Laboratory of Industrial Control Technology Institute of Cyber-systems and Control Zhejiang University Hangzhou 310027 China Laboratory for the Modeling of Biological and Socio-technical Systems Northeastern University Boston Massachusetts 02115 USA

The metapopulation framework is adopted in a wide array of disciplines to describe systems of well separated yet connected subpopulations. The subgroups or patches are often represented as nodes in a network whose links represent the migration routes among them. The connections have been so far mostly considered as static, but in general evolve in time. Here we address this case by investigating simple contagion processes on time-varying metapopulation networks. We focus on the SIR process and determine analytically the mobility threshold for the onset of an epidemic spreading in the framework of activity-driven network models. We find profound differences from the case of static networks. The threshold is entirely described by the dynamical parameters defining the average number of instantaneously migrating individuals and does not depend on the properties of the static network representation. Remarkably, the diffusion and contagion processes are slower in time-varying graphs than in their aggregated static counterparts, the mobility threshold being even two orders of magnitude larger in the first case. The presented results confirm the importance of considering the time-varying nature of complex networks.

关键词： DYNAMICAL systems PROBABILITY theory TIME-varying systems METAPOPULATION (Ecology) COMPUTER networks GROUP theory

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A Novel Grid-Based K-Means Combined With Self-Organizing Map

A Novel Grid-Based K-Means Combined With Self-Organizing Map

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2013 Asia-Pacific Computational Intelligence and Information technology Conference(APCIIT 2013)

作者： JIN DING YONG-ZAI LU JIAN CHU State Key Laboratory of Industrial Control Technology Institute of Cyber-System and Control Zhejiang University

Clustering plays an important role in data analysis. The classic k-means method is not well scaled to large datasets and its performance is sensitive to the initial seeds. In this paper we present the development of a novel hybrid k-means which proceeds on the result of the self-organizing map(SOM) training and initializes its seeds based on the trained SOM grid. Theoretical analysis suggests this method is time-efficient to the massive datasets. And in addition, the numerical results show the grid-based seed initialization has faster convergence characteristics and competitive accuracy on both computer-generated and real-world test cases compared to its randomized seed initialization counterpart.

关键词： A Novel Grid-Based K-Means Combined With Self-Organizing Map

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Notes on Sampled-data Design for Robust control of a Single Qubit

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IFAC Proceedings Volumes 2013年第20期46卷 353-358页

作者： Yuanlong Wang Chunlin Chen Daoyi Dong Institute of Cyber-Systems and Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Department of Control and System Engineering Nanjing University Nanjing 210093 China Institute of Cyber-Systems and Control State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China and School of Engineering and Information Technology University of New South Wales at the Australian Defence Force Academy Canberra ACT 2600 Australia

This paper presents several notes on the robust control method proposed in [Dong et al (2013), Sampled-data design for robust control of a single qubit. IEEE Transactions on Automatic control, in press] and furthermore improves the original sampling periods so that this control method can be better and more easily realized. For the case of amplitude damping decoherence, a larger sampling period is presented when the upper bound of the probability of failure is small enough. For the case of phase damping decoherence, a larger sampling period is given when the lower bound of the target coherence is large enough. Furthermore, we provide improved sampling periods for both of the above two cases under the same assumption as that in [Dong et al (2013), Sampled-data design for robust control of a single qubit. IEEE Transactions on Automatic control, in press].

关键词： Quantum control qubit sampled-data design sliding mode control robust decoherence control

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Multi-objective mathematic programming model and algorithm for production planning in steel and iron enterprise

Multi-objective mathematic programming model and algorithm f...

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Chinese control Conference (CCC)

作者： Shan Lu Hong-ye Su Li Zhu Qinghong Shen National Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China

As iron and steel products demand becomes increasingly diversified and batch reduced, make-to-order production has gradually satisfied the demand of modern iron and steel enterprises. It is significant for optimization of the make-to-order production planning to guarantee punctual delivery considering inventory, production capacity, processes and product specification. A multi-objective mixed integer nonlinear programming (MINLP) model is formulated to optimize the production, and a hybrid particle swarm optimization algorithm is developed to solve the model. A case study based on the order data of a steel and iron enterprise is presented. Compared with the optimization strategy upon particle swarm optimization and manual scheduling, the proposed optimization model and strategy effectively reduce losses caused by back order, inventory storage and unbalanced production capacity, and provide a reference and guidance for the operation.

关键词： Steel Iron Particle swarm optimization Programming Production planning Optimization

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Mobile robot map building in eigenspace - A pea-based approach

Mobile robot map building in eigenspace - A pea-based approa...

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2013 25th Chinese control and Decision Conference, CCDC 2013

作者： Wang, Ke Zhao, Lijun Li, Ruifeng State Key Laboratory of Robotics and Systems Harbin Institute of Technology Harbin 150080 China Key Laboratory of Measurement and Control of CSE Ministry of Education Nanjing 150001 China

ISBN: (纸本)9781467355322

Detection and compression of the environmental information incrementally is useful when the mobile robot needs to continuously update its perception database online. In this paper, we propose an incremental subspace fusion method for abstract map building of mobile robot. We firstly adopt PCA to preprocess the panoramic images taken from omnidirectional camera at corresponding location, which can optimally extracts the local map features formed in the subspace and reduces the uncorrelated features. This enables robot to memorize the environmental features incrementally when it travels in an unknown environment. Experimental results are shown finally. © 2013 IEEE.

关键词： Mobile robots

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Integrated tracking initiation mechanism based on probability for bearing-only sensor networks

Integrated tracking initiation mechanism based on probabilit...

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6th China Conference of Wireless Sensor Networks, CWSN 2012

作者： Li, Yuanshi Wang, Zhi Shao, Huajie Cai, Shengsheng Bao, Ming State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou 310027 China Institute of Acoustic Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9783642362514

Tracking initiation issue under bearing-only sensor networks is studied. A mechanism for tracking initiation based on probability is proposed, aiming at solving problem under measuring environment with false alarm and undetected. The mechanism is achieved by two phases including target localization and target confirm. In target localization phase, Multiple Target Probability Localization algorithm is proposed to estimate target initial state, providing new thinking for multi-target localization under bearing-only measurements which distinguishes the true target localizations from the false ones relatively by probability. In target confirm phase, target probability is introduced as judgment for tracking initiation and a recursive algorithm under multi-sensor is provided. The simulation shows that the proposed mechanism can be well-work under different settings and the required computation is limited which is suitable for WSN. © 2013 Springer-Verlag.

关键词： Sensor networks

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A robust strictly passive output{error identifier for continuous{time systems

A robust strictly passive output{error identifier for contin...

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11th IFAC International Workshop on Adaptation and Learning in control and Signal Processing, ALCOSP 2013

作者： Wang, Lei Ortega, Romeo Su, Hongye Liu, Xiangbin Zhu, Yang State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China Laboratoire des Signaux et Systèmes CNRS UMR 8506 Univ Paris Sud-P11 91192 Gif sur Yvette France Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9783902823373

This paper shows that the adaptive output error identifier for linear time-invariant continuous-time systems proposed by (Betser and Zeheb [1995]) is robust vis{-a{vis measurement noise. More precisely, it is proven that the map from the noise to the estimation error is L2- stable-provided a tuning parameter is chosen sufficiently large. A procedure to determine the required minimal value of this parameter is also given. If the noise is exponentially vanishing, asymptotic convergence to zero of the prediction error is achieved. Instrument for the establishment of the results is a suitable decomposition of the error system equations that allows us to strengthen-to strict-the well-known passivity property of the identifier. The estimator does not require fast adaptation, a dead-zone, nor the knowledge of an upperbound on the noise magnitude, which is an essential requirement to prove stability of standard output error identifiers. To robustify the estimator with respect to non-square integrable (but bounded) noises a prediction error-dependent leakage term is added in the integral adaptation. A simulated example, which is unstable for the equation error identifier and the output error identifier of (Betser and Zeheb [1995]), is used to illustrate the noise insensitivity property of the new scheme. © IFAC.

关键词： Identification (control systems)

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Image based micro flow measurement technology

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Information technology Journal 2013年第19期12卷 4901-4905页

作者： Jian-Gang, Lu Yu-Cong, Liu Xin-Xin, Ye Ying-Zi, Shi Hua, Gao Jiang, Yang State Key Laboratory of Industrial Control Technology Department of Control Science and Engineering Zhejiang University Hangzhou 310027 China Bank of China Head Office Fuxingmennei Street 1 Beijing 100818 China College of Education Hangzhou Normal University Hangzhou 311121 China Institute of Information Technology Zhejiang Institute of Communications Hangzhou 311112 China

Based on the image processing of the liquid droplets at the outlet of a single micro pipe, a novel low cost micro flow measurement technology for micro-chemical process is introduced. The connected component labeling algorithm is implemented firstly to extract a rough contour of the droplet from binary image. The droplet contour is refined by Laplace-Young equation based fitting which is to use Newton-Raphson method to optimize the shape parameters. Then the droplet volume is obtained by integration method. Finally, the flow rate can be calculated periodically through the real-time calculation of the droplet volume. The experimental results illustrate that the total average absolute deviation (AAD%) of the measurements is 2.09% over the micro liquid flow rate range of 5-60ml/h. This novel method can be readily extended to measure multi-pipe micro flows simultaneously which is of great significance for micro chemical plants where a large number of pipes may be used. © 2013 Asian Network for Scientific Information.

关键词： Laplace transforms

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