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IEEE International Conference on Mechatronics and Automation

作者： Xiaodong Du Bin Liang Yanbo Tao Institute of Space Intelligent System Harbin Institute of Technology Harbin Heilongjiang China School of Automation Science & Electrical Engineering Beijing Aeronautics and Astronautics University Beijing China

In recent years, some communication satellites lost their ability due to failure of mechanisms to deploy, resulting in large cost. A space robotic system is expected to perform the on-orbit repairing mission. This is a tremendous challenge since the targets are generally non-cooperative, i.e. not any artificial patterns used for the measurement are mounted on the targets. Moreover, these targets are very large. Limited by the FOV (field of view), a monocular camera can not supply enough information of the targets. In this paper, a method based on two coordinated cameras is proposed to determine the pose (position and orientation) of a large non-cooperative target. Firstly, we designed a sensing system used for the non-cooperative measurement according to the investigation of the communication satellites characteristics. Then, a rectangle feature, which is common in the configuration of a satellite, is chosen as the recognized object. Secondly, we proposed that two cameras share the recognition task in a coordinated behavior, i.e. each provides partial image of the rectangle, and the full features are then obtained by fusing their information. Lastly, the corresponding algorithm of pose measurement is addressed. Simulation results of typical cases verify the proposed approach.

关键词： Cameras Artificial satellites Robot vision systems Space technology Extraterrestrial measurements Robot kinematics Charge-coupled image sensors Space vehicles Costs Charge coupled devices

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3-D display and communication technology 09

3-D display and communication technology

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3rd International Universal Communication Symposium, IUCS 2009

作者： Park, Min-Chul Son, Jung-Young Intelligent System Research Division Korea Institute of Science and Technology Cheongryang Seoul 136-791 Korea Republic of School of Computer and Communication Engineering Daegu University Jillyang Gyeongsan Gyeongbuk 712-714 Korea Republic of

ISBN: (纸本)9781605586410

In this paper, we describe 3-D display in the aspect of communication technology. 3-D display provides 3-D images to the viewers with more accurate and realistic information than which 2-D display does. This feature is an essential component of communication technology. Generally communication technology pursues for exchanging and sharing of thoughts, feelings and ideas. 3-D displays are effective contact media to achieve these goals. The concept of accessible spatial dimension of a person is used to describe 3-D display in the aspect of communication technology. It is classified into three dimensions and each of dimensions represents the dimension of contact media. Several research results, related with 3-D display and communication technology are introduced based on the concept. Copyright 2009 ACM.

关键词： Computer programming

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The fourth international conference on intelligent environments (IE 08): a report

The fourth international conference on intelligent environme...

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作者： Hagras, Hani Callaghan, Vic Cook, Diane Helal, Abdelsalam Department of Computing and Electronic System University of Essex United Kingdom Computational intelligence Centre Fuzzy Systems Research United Kingdom Department of Computer science University of Essex United Kingdom Inhabited Intelligent Environments group United Kingdom School of Electrical Engineering and Computer Science Washington State University United States Engineering Department Computer and Information Science University of Florida United States

The Fourth IET International Conference on intelligent Environments was held July 21- 22 at the university of Washington campus in Seattle, Washington. The general chairs were Diane Cook of Washington State university and Sumi Helal of the university of Florida. Hani Hagras and Vic Callaghan of the university of Essex served as program chairs. This article presents a report of the conference. Copyright © 2009, Association for the Advancement of Artificial Intelligence. All rights.

关键词： intelligent agents

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Adaptive sliding mode control for Takagi-Sugeno fuzzy systems

Adaptive sliding mode control for Takagi-Sugeno fuzzy system...

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48th IEEE Conference on Decision and Control held jointly with 2009 28th Chinese Control Conference, CDC/CCC 2009

作者： Zhang, Jinhui Shi, Peng Xia, Yuanqing Fu, Mengyin Key Laboratory of Complex System Intelligent Control and Decision School of Automation Beijing Institute of Technology Beijing 100081 China Faculty of Advanced Technology University of Glamorgan Pontypridd CF37 1DL United Kingdom School of Engineering and Science Victoria University Australia

ISBN: (纸本)9781424438716

This paper is devoted to robust adaptive sliding mode control for a class of nonlinear systems in the Takagi-Sugeno forms with mismatched parametric uncertainties. Sufficient conditions for the existence of linear sliding surfaces are given in terms of linear matrix inequalities, by which the corresponding adaptive reaching motion controller is also designed. Simulation studies show the effectiveness of the control scheme. ©2009 IEEE.

关键词： Linear matrix inequalities

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The research on a novel PZT actuated precise tilt positioning system

The research on a novel PZT actuated precise tilt positionin...

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IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Bing Shao Liguo Chen Weibin Rong Min Xu Changhai Ru School of Material Science and Engineering Harbin Institute of Technology China State Key Laboratory of Robotics and System Harbin Institute of Technology China Automation College Harbin Engineering University China

The need for precise fast positioning technique draws attention on space inter-satellite optical communication. This paper presents a novel PZT actuated precise tilt positioning system (PTPS), which consists of the control module, the PZT driving module, the precise tilt positioning mechanism (PTPM), and the precise displacement measure module. It provides a fast and precise control in tilt movements. Firstly, the structure analysis and design of PTPM are accomplished. Then the control module is developed and the current/ voltage composite driving method is investigated in detail. Finally, following the experimental results which confirm the validity of the design and theoretical analysis of the PFPS.

关键词： Actuators Communication system control Materials science and technology Space technology Voltage Microwave communication Robotics and automation Optical fiber communication Control systems Position measurement

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An improved particle swarm optimization with feasibility-based rules for mixed-variable optimization problems

An improved particle swarm optimization with feasibility-bas...

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2009 4th International Conference on Innovative Computing, Information and Control, ICICIC 2009

作者： Sun, Chao-Li Zeng, Jian-Chao Pan, Jeng-Shyang Complex System and Computational Intelligence Laboratory Taiyuan University of Science and Technology Taiyuan Shanxi 030024 China Shenzhen Graduate School Harbin Institute of Technology Shenzhen Guangdong 518055 China Department of Electronic Engineering National Kaohsiung University of Applied Sciences Kaohsiung 807 Taiwan

ISBN: (纸本)9780769538730

This paper presents an improved particle swarm optimization algorithm with feasibility- based rules (FRIPSO) to solve mixed-variable constrained optimization problems. Different kinds of variables are dealt in different ways in FRIPSO algorithm. Constraint handling is based on simple feasibility-based rules without the use of a penalty function which is frequently cumbersome to parameterize, nor need it to guarantee the particles be in the feasible region at all time which turn out to cost much time sometimes. In order to improve the convergence speed of FRIPSO with the iteration growing and to find global optimum, the standard PSO is used to find a better position for the best history position of the swarm on the condition that the discrete value are same with those of gbest in each iteration. Two practical benchmark mixed-variable optimization problems are tested by our FRIPSO algorithm to demonstrate the effectiveness and robustness of the proposed approach. © 2009 IEEE.

关键词： Constraint handling

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Moving Object Detection Based on Edged Mixture Gaussian Models

Moving Object Detection Based on Edged Mixture Gaussian Mode...

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International Workshop on intelligent systems and Applications, ISA

作者： Ying-Hong Li Chang-Zhen Xiong Yi-Xin Yin Ya-Li Liu School of Information and Engineering University of Science and Technology Beijing Beijing China Laboratory of Intelligent transportation System North China University of Technology Beijing China

Learning background statistics is an essential task for several visual surveillance applications such as incident detection and traffic management. An adaptive foreground object extraction algorithm for real-time video surveillance is presented in this paper. The proposed algorithm improves the classic Gaussian mixture background models (GMM) to remove the undesirable subtraction results due to sudden illumination change. This implementation is achieved by replacing the whole image with edge image to build mixture Gaussian models at every frame. Experimental results show that the proposed algorithm possesses higher performance on real surveillance video under a variety of different environments with lighting variations.

关键词： Object detection Image edge detection Pixel Change detection algorithms Detectors intelligent transportation systems Video surveillance Lighting Gaussian distribution Smoothing methods

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N-order difference heuristic model of fuzzy time series forecasting

N-order difference heuristic model of fuzzy time series fore...

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IEEE International Conference on intelligent Computing and intelligent systems (ICIS)

作者： Kai Chi Wen-Gang Che Pattern Recognition and Intelligent System School of Information Engineering and Automation Kunming University of Science and Technology China Key Laboratory of Computer Technology and Application of Yunnan Province Kunming University of Science and Technology China

Fuzzy time series forecasting model is an effective method to solve the nonlinear problems forecasting. However, most published fuzzy time series based models did not count the change trend implicit in historical datum. In this paper, authors proposed a novel method which applied heuristic information to the fuzzy time series model based on Fibonacci sequence. As an example, the USD/JPY exchange rate is tested in this model. The results show that this method not only improves the forecasting accuracy, but decreases the computational complexity.

关键词： Predictive models Technology forecasting Economic forecasting Uncertainty Fuzzy systems Pattern recognition intelligent systems Automation Channel hot electron injection Laboratories

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Estimating structure of multivariate systems with genetic algorithms for nonlinear prediction

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Physical Review E 2009年第6期80卷 066208-066208页

作者： Tomoya Suzuki Yuta Ueoka Haruki Sato Department of Intelligent Systems Engineering College of Engineering Ibaraki University 4-12-1 Nakanarisawa-cho Hitachi Ibaraki 316-8511 Japan Graduate School of Engineering Doshisha University 1-3 Tatara-Miyakodani Kyotanabe-shi Kyoto 610-0321 Japan Department of Information System Design Faculty of Science and Engineering Doshisha University 1-3 Tatara-Miyakodani Kyotanabe-shi Kyoto 610-0321 Japan

Although we can often observe time-series data of many elements, these elements do not always interact with each other. This paper proposes a scheme to estimate the interdependency among observed elements only by time-series data, which is useful for selecting essential elements to optimize multivariate prediction model. Because this estimation is a sort of combinatorial optimization problems, we applied the genetic algorithm as a method to moderate this problem. Through some simulations, we confirmed performance of our method, which can identify interaction of multivariate system and can improve its prediction accuracy. Especially, our method can be applied to predict real foreign-exchange markets even if system has nonstational property and its structure changes dynamically.

关键词： Genetic algorithms

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Knowledge radius: A selective knowledge use strategy for distance-typefuzzy reasoning method

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ICIC Express Letters 2009年第3期3卷 331-336页

作者： Shang, Tao Wang, Shuo-Yu Liu, Jian-Wei Wang, Xi-Bo School of Electronic and Information Engineering BeiHang University No. 37 XueYuan Road HaiDian District Beijing 100191 China Department of Intelligent Mechanical System Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada-cho Kami-gun Kochi 782-8502 Japan School of Information Science and Engineering Shenyang University of Technology Economy and Technology Developing District ShenYang 110178 China

Fuzzy systems usually consist of fuzzy rule, fuzzy reasoning method andrelated parameter optimization method. For the performance of fuzzy system, fewproposals offer a framework that emphasizes knowledge use in reasoning processso far. We defined the concept of knowledge radius from the perspective ofknowledge use, adopted knowledge radius as knowledge use strategy of reasoningprocess, presented a Distance-Type Fuzzy Reasoning method with knowledge radius,analyzed the efficacy of knowledge radius in reasoning process, and verifiedthe scope of knowledge radius. Such conclusion will provide the guideline to theidentification of knowledge radius for specific problem, and furtherexploration to the property of knowledge radius. ICIC International © 2009.

关键词： Fuzzy systems

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