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IEEE International Conference on robotics and Automation (ICRA)

作者： Li Chen Yuechao Wang Shugen Ma Bin Li Graduate School of Chinese Academy of Sciences China Robotics Laboratory Shenyang Institute of Automation Shenyang China Department of Systems Engineering Ibaraki University Hitachi Japan

A reconfigurable modular snake robot has been developed, which can not only move on a plane but aIso achieve some f-dimensional motions while reconfigured. Control equations of 3-dimensional locomotion were established by the composition of two bending motions in mutual orthogonal plane. Three types of lateral rolling locomotion, flapping, linear rolling and curved rolling, were achieved by controlling the amplitudes and the number of two waves in the two bending motions. Using the three types of locomotion the snake robot can realize net lateral translation, alternation of its contact base and rolling over some obstacles. The lateral rolling locomotion obtains its driving force through the interaction with the environment. The rolling shape and its direction depend on the transferring direction and phase difference of the two waves respectively.

关键词： Robots DC motors Orbital robotics robotics and automation Motion control Metalworking machines Laboratories systems engineering and theory Equations Shape

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Application of uncertain variables in an adaptive decision system for a complex of operations

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systems Science 2004年第3期30卷 85-94页

作者： Orski, Donat Sugisaka, Masanori Institute of Control and Systems Engineering Wroclaw University of Technology Wybrzeze Wyspiańskiego 27 50-370 Wroclaw Poland Artificial Life and Robotics Laboratory Department of Electrical and Electronic Engineering Oita University 700 Dannoharu Oita 870-1192 Japan

The paper concerns a decision plant consisting of parallel operations, which are described by relational models with unknown parameters. The unknown parameters are assumed to be values of uncertain variables characterized by certainty distributions given by an expert. The solution of a decision problem and, consequently, performance of the knowledge-based decision system is very sensitive to the forms and parameters of certainty distributions. In the paper, it is shown how application of an adaptation process, consisting in step by step changing of parameters in certainty distributions based on current performance evaluation, may improve performance of a decision system under consideration. An illustrative example and results of simulations are included.

关键词： Uncertain systems

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Modular hybrid Petri nets for studying multi-operational production systems where parts follow multiple alternative processes

Modular hybrid Petri nets for studying multi-operational pro...

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IEEE International Conference on robotics and Automation (ICRA)

作者： G.J. Tsinarakis K.P. Valavanis Intelligent Systems and Robotics Laboratory Department of Production Engineering and Management Technical University of Crete Chania Greece Department of Computer Science and Engineering University of South Florida Center for Robot-Assisted Search and Rescue Tampa FL USA

This work presents a modular hybrid timed Petri net (MHTPN) methodology used to study multi-operational production systems in which parts are used for the production of different product types. This research generalizes work presented in Tsinarakis, GJ et al., (2003) that studied production systems where all parts of the same type were used for the production of a type of final products following a common route. 3 fundamental system modules are derived; their MHTPN models are defined, followed by modules synthesis to obtain the overall system Petri net. For any topology, system's nodes and invariants are calculated. Applicability of the method is illustrated through an analytical example.

关键词： Petri nets Production systems Topology Fluid dynamics Assembly Intelligent robots Hybrid intelligent systems Laboratories Production engineering engineering management

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Novel micro gripping, probing, and sensing devices for single-cell surgery

Novel micro gripping, probing, and sensing devices for singl...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： W.J. Li Ning Xi Centre for Micro and Nano Systems Chinese University of Hong Kong New Territories Hong Kong China Micro/Nano Robotics and Automations Laboratory Shenyang Institute of Automation Chinese Academy and Sciences Shenyang Liaoning China Robotics and Automation Laboratory Department of Electrical Engineering Michigan State University East Lansing MI USA

Several novel devices under development in our laboratories to ultimately realize a micro robotic system for single cell nanoscale probing, injection, imaging and surgery is described in this paper. Thus far, we have 1) developed MEMS polymer grippers that can be actuated under water with very large deflection and are capable of gripping 500/spl mu/m embryonic cells in water with /spl sim/2 V input; 2) developed a probe-etching technique to controllably shape fiber probes into various tip geometries, i.e., fibers with initial diameter of 125 /spl mu/m were sharpened into tips with angles ranging from <2.7-9.7/spl deg/ and with nanoscale tip diameters of <1/spl mu/m; 3) developed a novel PVDF force sensing system with resolution in the sub-/spl mu/N range for applications in bio-manipulation, bio-injection, and potentially single cell surgery. Details of these technologies are discussed in this paper.

关键词： Surgery Shape control Laboratories Robot sensing systems Nanoscale devices Micromechanical devices Polymers Grippers Embryo Force control

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Fault detection and identification for robot manipulators

Fault detection and identification for robot manipulators

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IEEE International Conference on robotics and Automation (ICRA)

作者： M.L. McIntyre W.E. Dixon D.M. Dawson I.D. Walker Department of Electrical & Computer Engineering Clemson University Clemson SC USA Robotics and Energetic Systems Group Oak Ridge National Laboratory Oak Ridge TN USA Department of Electrical & Computer Engineering Clemson University Clemson SC

Several factors must be considered for robotic task execution in the presence of a fault, including: detection, identification, and accommodation for the fault. In this paper, a prediction error based dead-zone residual function and nonlinear observers are used to detect and identify a class of actuator faults. Advantages of the proposed fault detection and identification methods are that they are based on the nonlinear dynamic model of a robot manipulator (and hence, can be extended to a number of general Euler Lagrange systems), they do not require acceleration measurements, and they are independent from the controller. A Lyapunov-based analysis is provided to prove that the developed fault observer converges to the actual fault.

关键词： Fault detection Fault diagnosis Robots Manipulator dynamics Accelerometers Medical robotics Acceleration Electrical fault detection US Department of Energy Contracts

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Study on a snake-like robot adapting to the ground

Study on a snake-like robot adapting to the ground

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WCICA 2004 - Fifth World Congress on Intelligent Control and Automation, Conference Proceedings

作者： Li, Bin Tan, Dalong Wang, Yuechao Chen, Li Ma, Shugen Robotics Laboratory Shenyang Institute of Automation CAS 114 Nanta Street Shenyang 110016 China Department of Systems Engineering Ibaraki University 4-12-1 Nakanarusawa-Cho Hitachi 316-8511 Japan

Biological snakes' diverse locomotion modes and physiology make them supremely adapted for the ground. This paper discusses the Biological snakes' locomotion mode on the diverse ground, and describes the development of a snake-like robot with the adaptability for the ground. The method to realize some locomotion modes is given. The method for detecting the characteristic of ground is proposed and identified in test.

关键词： Mobile robots

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Using a non-prior training active feature model

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3333卷 69-78页

作者： Kim, Sangjin Kang, Jinyoung Shin, Jeongho Lee, Seongwon Paik, Joonki Kang, Sangkyu Abidi, Besma Abidi, Mongi Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University 221 Huksuk-Dong Tongjak-Ku Seoul 156-756 Korea Republic of Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering University of Tennessee Knoxville TN 27996-2100 United States

This paper presents a feature point tracking algorithm using optical flow under the non-prior training active feature model (NPT-AFM) framework. The proposed algorithm mainly focuses on analysis of deformable objects, and provides real-time, robust tracking. The proposed object tracking procedure can be divided into two steps: (i) optical flow-based tracking of feature points and (ii) NPT-AFM for robust tracking. In order to handle occlusion problems in object tracking, feature points inside an object are estimated instead of its shape boundary of the conventional active contour model (ACM) or active shape model (ASM), and are updated as an element of the training set for the AFM. The proposed NPT-AFM framework enables the tracking of occluded objects in complicated background. Experimental results show that the proposed NPT-AFM-based algorithm can track deformable objects in real-time. © Springer-Verlag 2004.

关键词： Optical flows

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Various emotional expressions with emotion expression humanoid robot WE-4RII

Various emotional expressions with emotion expression humano...

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IEEE Technical Exhibition Based Conference on robotics and Automation, TExCRA

作者： K. Itoh H. Miwa M. Matsumoto M. Zecca H. Takanobu S. Roccella M.C. Carrozza P. Dario A. Takanishi Graduate School of Science and Engineering Waseda University Tokyo Japan Department of Mechanical Engineering Waseda University Tokyo Japan ARTS Laboratory Scuola Superiore Sant'' Anna Pontedera Italy Humanoid Robotics Institute Waseda University Tokyo Japan Department of Mechanical Systems Engineering Kogakuin University Tokyo Japan

The authors have been developing humanoid robots in order to develop new mechanisms and functions for a humanoid robot that has the ability to communicate naturally with a human by expressing human-like emotion. In 2004, we developed the emotion expression humanoid robot WE-4RII (Waseda Eye No.4 Refined II) by integrating the new humanoid robot hands RCH-I (RoboCasa Hand No.1) into the emotion expression humanoid robot WE-4R. We confirmed that WE-4RII can effectively express its emotion.

关键词： Humanoid robots Robot kinematics Emotion recognition Subspace constraints Olfactory Robot sensing systems Human robot interaction Motion pictures Mechanical engineering Mechanical systems

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Topological dependence of mechanical responses of solidification microstructures in aluminum brazed joints

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中国有色金属学会会刊：英文版 2003年第6期13卷 1296-1300页

作者：高峰钱乙余 D.P.Sekulic 马鑫 F.Yoshida State Key Laboratory of Advanced Production Technology Center for Robotics and Manufacturing Systems Department of Mechanical System Engineering

The main objective is to provide an evidence of spatial dependence of mechanical responses of a heterogeneous aluminum brazed joint re-solidified clad, and to confirm a sufficient sensitivity of a nano-indentation—load curve method for identifying the dependence. Topological features of a network of solidification microstructures(α phase and eutectic), formed during quench in a brazing process of aluminum alloy, influence significantly dynamic mechanical responses of resulting heterogeneous material. Nano/micro indentation depth vs load characteristics of differing phases suggest a spatially sensitive mechanical response of a re-solidified fillet in the joint zone. Hence, a spatial distribution, pattern formations and other morphological characteristics of microstructures have a direct impact on an ultimate joint integrity. Topology-induced variations of indentation—load curves was presented. A hypothesis involving microstructures’ spatial distribution vs mechanical response was formulated.

关键词：铝铜焊显微结构凝固拓扑相关机械响应焊接铝合金

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Ground condition sensing of a snake-like robot

Ground condition sensing of a snake-like robot

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IEEE International Conference on robotics, Intelligent systems and Signal Processing

作者： Lu, Y Ma, SG Li, B Chen, L Robotics Laboratory Shenyang Institute of Automation CAS China Department of Systems Engineering Ibaraki University Japan

ISBN: (纸本)078037925X

Snake-like robot has its unique locomotion mode and can change its locomotion form while the ground condition changed, to achieve the best velocity and efficiency. We first analyze the snake-like robot locomotion on different terrains simply, then point out the significance to sense the ground status that is the base of choosing different locomotion form on different ground. Last we use force sensors to distinguish the different ground status.

关键词： Robots

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