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

作者： Min Wang Shuzhi Sam Ge College of Automation and the Center for Control and Optimization South China University of Technology the Institute of Intelligent Systems and Information Technology University of Electronic Science and Technology of China the Department of Electrical and Computer Engineering National University of Singapore

This paper presents adaptive neural tracking control for a class of non-affine pure-feedback systems with multiple unknown state time-varying delays. The separation technique is introduced to decompose unknown functions of all time-varying delayed states into a series of continuous functions of each delayed state. A novel Lyapunov-Krasovskii functional is employed to compensate for the unknown function of current delayed state, which is effectively free from any restrictive assumption on unknown time-delay functions. The proposed control scheme guarantees the boundedness of all the signals in the closed-loop system and the tracking *** studies are provided to demonstrate the effectiveness of the proposed scheme.

关键词： Lyapunov Approximation-Based Adaptive Tracking control of Pure-Feedback Nonlinear Systems with Multiple Unknown Time-Varying Delays

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Eye tracking system for Ophthalmic Operating Microscope

Eye tracking system for Ophthalmic Operating Microscope

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SICE Annual Conference

作者： Suthum Keerativittayanun Kanokwan Rakjaeng Toshiaki Kondo Waree Kongprawechnon Kanokvate Tungpimolrut Teesid Leelasawassuk Thailand Advance Institute of Science and Technology-Tokyo Tech (TAIST-Tokyo Tech) Sirindhorn International Institute of Technology Thammasat University Pathum Thani Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Pathum Thani Thailand

Eye tracking is widely useful in several fields especially in medical field to help human diagnosis and treatment. The proposed of this study is to develop eye tracking system using intensity measurement algorithm and apply into ophthalmic operating microscope. The proposed method has been proved to be accurate, reliable, and stable.

关键词： Microscopy Tracking Switches Image processing Iris Foot Pixel Humans Position measurement Real time systems

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A research roadmap for model-driven design of embedded systems for automation components

A research roadmap for model-driven design of embedded syste...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： T. Strasser M. Rooker I. Hegny M. Wenger A. Zoitl L. Ferrarini A. Dede M. Colla Robotics and Adaptive Systems PROFACTOR GmbH Austria Automation and Control Institute University of Technology Vienna Austria Dipartimento di Elettronica e Informazione Politecnico di Milano Italy Institute of Computer Integrated Manufacturing of Sustainable Innovation University of Applied Science Switzerland

The aim of this paper is to describe a research roadmap for a multi-domain model-driven embedded systems design approach and the corresponding meta-model which is applicable to the domain of complex Industrial automation and control Systems (IACS). The special requirements of the industrial automation sector are taken into account by this novel approach, utilizing existing model-driven techniques. This approach is currently being developed in the Framework Seven (FP7) Embedded Systems Design project MEDEIA funded by the European Commission.

关键词： Embedded system Design automation Automatic control Electrical equipment industry control systems Industrial control Robotics and automation Design engineering control system synthesis Production

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An Empirical Study of DV-Hop Localization Algorithm in Random Sensor Networks

An Empirical Study of DV-Hop Localization Algorithm in Rando...

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International Conference on Intelligent Computation Technology and automation, ICICTA

作者： Lingfei Wu Max Q.-H. Meng Zhenzhong Dong Huawei Liang Department of Automation University of Science and Technology Hefei Anhui China Center of Biomimetic Sensing and Control Research Institute of Intelligent Machines Chinese Academy and Sciences Hefei Anhui China Department of Electronic Engineering Chinese University of Hong Kong Hong Kong China Department of Computer Science University of Science and Technology Hefei Anhui China

ISBN: (纸本)9781424447411

Node localization is an important problem for location-dependent applications of wireless sensor networks. Aiming at the positioning problem of wireless sensor networks node location, an improved DV-Hop localization algorithm is proposed in this paper. The proposed method firstly recalculates the hop-size and sends different correction along different directions instead of computing a single correction to be broadcasted into the networks. Then we empirically evaluate the difference between distance estimate and actual distance through a number of simulation experiments statistical results. We find empirical parameter to improve the accuracy of distance estimate. Simulation results show that the performance of the proposed scheme outweighs classical DV-Hop algorithms, especially in lower connectivity.

关键词： Wireless sensor networks Intelligent sensors computer networks Intelligent networks Machine intelligence Biomimetics Intelligent robots Robotics and automation Broadcasting Computational modeling

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Intelligent modified predictive optimal control of reheater steam temperature in a large-scale boiler unit

Intelligent modified predictive optimal control of reheater ...

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IEEE General Meeting Power& Energy Society

作者： Kwang Y. Lee Liangyu Ma Chang-Jin Boo Won-Hee Jung Sung-Ho Kim Department of Electrical and Computer Engineering Baylor University Waco TX USA Automation Department School of Control Science and Engineering North China Electric Power University Baoding Hebei China Department of Electrical Engineering Cheju National University Jelu South Korea Corporate Research and Development Institute Doosan Heavy Industries and Construction Company Limited Taejon South Korea

A modified predictive optimal control (MPOC) scheme based on neural network modeling and particle swarm optimization (PSO) techniques is proposed in this paper for reheater steam temperature (RST) control of a large-scale boiler unit. A recurrent neural network is trained to directly model the temperature dynamic response of the reheater system. The neural network direct model is then used to evaluate the performance of the MPOC in search of the optimal control, where optimization is carried out with the PSO. A simplified PSO algorithm with search direction control is designed to find the nearest and optimal controls for the reheater steam temperature. To further improve the optimal search accuracy, each last-step prediction error between the direct model output and the actual RST is added to the current-step cost function to compensate for the model error. control tests on a full-scope simulator of a large scale power generating unit have shown the validity of the proposed method.

关键词： Optimal control Large-scale systems Boilers Predictive models Neural networks Temperature control Particle swarm optimization Recurrent neural networks Algorithm design and analysis Accuracy

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Development of flux density distribution measurement system based on CCD

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2008年第11期19卷 1507-1511页

作者： Dai, Jing-Min Liu, Ying Yu, Tian-He Dept. of Automation Measurement and Control Harbin Institute of Technology Harbin 150001 China Computer Centre Harbin University of Science and Technology Harbin 150001 China

A flux density distribution measurement system for rotating parabolic concentrators is designed and developed. The pictures of the distribution on focal plane and other defocused planes of the concentrator are taken by using an indirect method with a Lambert target and a CCD camera. The pictures are saved and processed by computer. The calibration method of system is introduced and the spot distribution picture of focal plane is presented. The measurement result is compared with the calculated result by Monte Carlo method. At last, the main system errors are analyzed. The experiment results show that the measurement error of flux density is 6.85%.

关键词： CCD cameras

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Switching LPV control for the air path system of diesel engines

Switching LPV control for the air path system of diesel engi...

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Chinese control and Decision Conference, CCDC

作者： Lihua liu Xiukun Wei Zhidong Liu Department of Computer Science and Automation Beijing Institute of Machinery Beijing China Delft Center of Systems and Control Delft University of Technnology Delft Netherlands

This paper addresses the switching LPV techniques aiming to improve the control performance of a class of nonlinear systems that can be approximated by a family of linear parameter varying (LPV) models for the entire operation envelope. The proposed method provides a systematical strategy for the controller synthesis for such class system which can guarantee the global stability of the closed loop. The proposed method is further applied to the air path system of diesel engines which is critical for reducing the emissions. Due to its strong nonlinearity the working envelope of the air path system is divided into four subregions and in each subregion an LPV model is built. Accordingly, a gain scheduled LPV controller is synthesized for each nominal LPV model, the system is then regulated by hysteresis switching logic among a family of LPV controllers. The effectiveness of the proposed method is illustrated by simulations.

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Quasi-LPV gain scheduling control for the air path system of diesel engines

Quasi-LPV gain scheduling control for the air path system of...

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Chinese control and Decision Conference, CCDC

作者： Lihua Liu Xiukun Wei Tao Zhu Department of Computer Science and Automation Beijing Institute of Machinery Beijing China Delft Center of Systems and Control Delft University of Technnology Delft Netherlands

This paper addresses the issue on gain scheduled quasi linear parameter varying (LPV) control strategy for the air path system of diesel engines, which plays a critical role for the emission reduction of diesel engines. Due to the strong nonlinearities of the underlying system, traditional linear control algorithm can not achieve a satisfactory control performance. In this paper, the considered nonlinear plant is approximated as an Hammerstein quasi-LPV system in the first place. An advanced quasi-LPV gain scheduled control strategy is applied to the underlying system. The effectiveness of the new control algorithm is illustrated by the simulations.

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Dynamic watermarking scheme based on the Shamir threshold and branch structure

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Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) 2008年第SUPPL. 2期38卷 221-225页

作者： Yin, Ke Wang, Zhi-Quan Zhu, Jian-Qi Dong, Gang School of Automation Nanjing University of Science and Technology Nanjing 210094 China Electric Power Simulation and Control Engineering Center Nanjing Institute of Technology Nanjing 211167 China Key Laboratory of Symbol Computation and Knowledge Engineer College of Computer Science and Technology Jilin University Changchun 130012 China

A novel dynamic software watermark scheme based on the Shamir threshold and branch structure is presented. First, we split the watermark into a set of shares using the Shamir threshold scheme. Second, these values are encrypted with the DES block cipher that forms the watermark shares to be embedded into different methods of program according to the dynamic behavior of the branch structure. Our scheme can withstand most semantics-preserving attacks and can retrieve the original watermark based on partial information. Simulation tests show that our scheme is very robust, stealthy and has a high price performance rate compared with other methods.

关键词： Semantics

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Conflict resolution for collaborative design based on rough set theory

Conflict resolution for collaborative design based on rough ...

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International Conference on computer Supported Cooperative Work in Design

作者： Jun Ma Tian-Yuan Xiao Jian-Chao Zeng Ma Hao Department of Automation National CIMS Engineering Research Center Tsinghua University Beijing China School of Computer Science and Technology Taiyuan University of Science and Technology Taiyuan China North Automatic Control Technology Institute Taiyuan China

ISBN: (纸本)9781424416509

Due to the design knowledge discrepancy during collaborative design, conflicts can be revealed from the process of collaborative design decision. A critical element of collaborative design would be conflict resolution. The conflict resolution is correlative with both of the knowledge granulation and specific method provided. In this paper, granularity is used to describe rules acquainted based on the concept of rough degree. In this condition, A feasible distance formula between different rules is constructed according to the requirement of describing the distance between different rules and the definition of attribute significance in information system with rough theory, in which the operator of attribute importance is introduced, and then traditional conflict resolutions are analyzed. As a result, the concept of rule set evolution is put forward, and the instance is introduced to explain the efficiency of new method.

关键词： Collaboration Set theory Collaborative work Process design Design methodology Product design Phase detection Knowledge management Space technology Design automation

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