The Experts below are selected from a list of 8190 Experts worldwide ranked by ideXlab platform
Bodo Rosenhahn - One of the best experts on this subject based on the ideXlab platform.
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a Kinematic Chain space for monocular motion capture
European Conference on Computer Vision, 2018Co-Authors: Bastian Wandt, Hanno Ackermann, Bodo RosenhahnAbstract:This paper deals with motion capture of Kinematic Chains (e.g. human skeletons) from monocular image sequences taken by uncalibrated cameras. We present a method based on projecting an observation onto a Kinematic Chain space (KCS). An optimization of the nuclear norm is proposed that implicitly enforces structural properties of the Kinematic Chain. Unlike other approaches our method is not relying on training data or previously determined constraints such as particular body lengths. The proposed algorithm is able to reconstruct scenes with little or no camera motion and previously unseen motions. It is not only applicable to human skeletons but also to other Kinematic Chains for instance animals or industrial robots. We achieve state-of-the-art results on different benchmark databases and real world scenes.
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a Kinematic Chain space for monocular motion capture
arXiv: Computer Vision and Pattern Recognition, 2017Co-Authors: Bastian Wandt, Hanno Ackermann, Bodo RosenhahnAbstract:This paper deals with motion capture of Kinematic Chains (e.g. human skeletons) from monocular image sequences taken by uncalibrated cameras. We present a method based on projecting an observation into a Kinematic Chain space (KCS). An optimization of the nuclear norm is proposed that implicitly enforces structural properties of the Kinematic Chain. Unlike other approaches our method does not require specific camera or object motion and is not relying on training data or previously determined constraints such as particular body lengths. The proposed algorithm is able to reconstruct scenes with limited camera motion and previously unseen motions. It is not only applicable to human skeletons but also to other Kinematic Chains for instance animals or industrial robots. We achieve state-of-the-art results on different benchmark data bases and real world scenes.
Yang Yongtai - One of the best experts on this subject based on the ideXlab platform.
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isomorphism identification algorithm of the planar multiple joint Kinematic Chains
2020 3rd World Conference on Mechanical Engineering and Intelligent Manufacturing (WCMEIM), 2020Co-Authors: Zou Yanhuo, Yang YongtaiAbstract:In this paper, topological model of the planar geared-linkage Kinematic Chain is introduced at firstly. Then, node voltage sequence be obtained by corresponding equivalent circuit model; An algorithm to identify isomorphic Kinematic is obtained by the solved node voltage sequence. Examples are carried out to show the planar multiple joint Kinematic Chains identification algorithm by circuit analysis method. (Abstract)
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structural automatic synthesis of planar simple joint Kinematic Chains
2020 3rd World Conference on Mechanical Engineering and Intelligent Manufacturing (WCMEIM), 2020Co-Authors: Zou Yanhuo, Yang YongtaiAbstract:In this paper, for automatic topological structural synthesis of the planar simple joint Kinematic Chains, an automatic algorithm has been obtained. Fisrtly, with special input parameters of incident matrix of the planar simple joint Kinematic Chains can be obtained with the help of single color topological graph by the single Kinematic Chain adding method. An automatic topological structural synthesis algorithm based on the single color topological graph automatic drawing of planar simple joint Kinematic Chains with specified degree of freedom and number of links can be obtained.
Zhaopeng Chen - One of the best experts on this subject based on the ideXlab platform.
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a novel su 8 electrothermal microgripper based on type synthesis of Kinematic Chain method
International Conference on Solid-State Sensors Actuators and Microsystems, 2011Co-Authors: Ran Zhang, Jinkui Chu, Zhaopeng ChenAbstract:Microgrippers act as an important role in MEMS, it is necessary to explore new and systematic approach for microgripper design. A new systematic design procedure used for chevron electrothermal actuator driven microgrippers is developed. A novel microgripper is obtained by this procedure based on type synthesis of Kinematic Chain method. And a geometry optimization is also carried out. By a novel processing technology, the novel SU-8 microgripper with an actuator of three layer sandwich structure is fabricated. With only 423.1 mV, 108.5 mW and 77.8 °C temperature increase at the actuator, a 68.5 µm jaws gap change is obtain. And during the operation processes, the out-of plane displacement of the tip is always lower than 0.5 µm.
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a novel su 8 electrothermal microgripper based on the type synthesis of the Kinematic Chain method and the stiffness matrix method
Journal of Micromechanics and Microengineering, 2011Co-Authors: Jinkui Chu, Ran Zhang, Zhaopeng ChenAbstract:This paper presents a new systematic design and optimization procedure used for the microgrippers driven by a chevron electrothermal actuator. The procedure includes three steps: first, a suitable rigid-body gripper mechanism is selected using the type synthesis of the Kinematic Chain method; then, the rigid-body mechanism is transferred into a compliant microgripper; finally, by the stiffness matrix model and the genetic algorithm, a geometry parametric optimization with the high output stiffness objective is carried out. Using this procedure, a novel SU-8 electrothermal microgripper is obtained. According to the FEM simulation, the microgripper meets the design requirements and satisfies the constraints. To eliminate the out-of-plane actuation, a novel processing technology is implemented to fabricate the microgripper with a sandwich structure actuator. The experimental results demonstrate that a jaw gap change of 107.5 µm requires only 73.6 mV, 25.61 mW and only 44.92 °C temperature increase at the actuator and the out-of-plane actuation is almost eliminated. A micromanipulation of a micro blood vessel specimen and a micro-assembly for micro-tensile testing studies of fine hair are demonstrated. Hence, the design procedure is valid to generate novel compliant micro mechanisms. The fabrication process can be used in the fabrication of other SU-8 MEMS devices actuated by the electrothermal actuator.
Bastian Wandt - One of the best experts on this subject based on the ideXlab platform.
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a Kinematic Chain space for monocular motion capture
European Conference on Computer Vision, 2018Co-Authors: Bastian Wandt, Hanno Ackermann, Bodo RosenhahnAbstract:This paper deals with motion capture of Kinematic Chains (e.g. human skeletons) from monocular image sequences taken by uncalibrated cameras. We present a method based on projecting an observation onto a Kinematic Chain space (KCS). An optimization of the nuclear norm is proposed that implicitly enforces structural properties of the Kinematic Chain. Unlike other approaches our method is not relying on training data or previously determined constraints such as particular body lengths. The proposed algorithm is able to reconstruct scenes with little or no camera motion and previously unseen motions. It is not only applicable to human skeletons but also to other Kinematic Chains for instance animals or industrial robots. We achieve state-of-the-art results on different benchmark databases and real world scenes.
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a Kinematic Chain space for monocular motion capture
arXiv: Computer Vision and Pattern Recognition, 2017Co-Authors: Bastian Wandt, Hanno Ackermann, Bodo RosenhahnAbstract:This paper deals with motion capture of Kinematic Chains (e.g. human skeletons) from monocular image sequences taken by uncalibrated cameras. We present a method based on projecting an observation into a Kinematic Chain space (KCS). An optimization of the nuclear norm is proposed that implicitly enforces structural properties of the Kinematic Chain. Unlike other approaches our method does not require specific camera or object motion and is not relying on training data or previously determined constraints such as particular body lengths. The proposed algorithm is able to reconstruct scenes with limited camera motion and previously unseen motions. It is not only applicable to human skeletons but also to other Kinematic Chains for instance animals or industrial robots. We achieve state-of-the-art results on different benchmark data bases and real world scenes.
Erik L.j. Bohez - One of the best experts on this subject based on the ideXlab platform.
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Five-axis milling machine tool Kinematic Chain design and analysis
International Journal of Machine Tools and Manufacture, 2002Co-Authors: Erik L.j. BohezAbstract:Five-axis CNC machining centers have become quite common today. The Kinematics of most of the machines are based on a rectangular Cartesian coordinate system. This paper classifies the possible conceptual designs and actual existing implementations based on the theoretically possible combinations of the degrees of freedom. Some useful quantitative parameters, such as the workspace utilization factor, machine tool space efficiency, orientation space index and orientation angle index are defined. The advantages and disadvantages of each concept are analyzed. Criteria for selection and design of a machine configuration are given. New concepts based on the Stewart platform have been introduced recently in industry and are also briefly discussed.
