A circular surface with a fixed radius can be swept out by moving a circle with its center following a curve, which acts as the spine curve. Based on a system of Euclidean invariants, the paper identifies those circular surfaces taking lines of curvature as generating circles and further explores the properties of the principal curvatures and Gaussian curvature of the tangent circular surfaces. The paper then applies the study to mechanism analysis by proving the necessary and sufficient condition for a circular surface to be generated by a serially connected , , or mechanism, where joint can be visualized as a special joint with a variable pitch of one degree of freedom. Following the analysis, this paper reveals for the first time the relationship between the invariants of a circular surface and the commonly used parameters of , , and mechanisms.
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e-mail: dlunwang@dlut.edu.cn
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October 2009
Research Papers
Kinematic Geometry of Circular Surfaces With a Fixed Radius Based on Euclidean Invariants
Delun Wang,
e-mail: dlunwang@dlut.edu.cn
Delun Wang
Professor of Mechanisms and Design
Dalian University of Technology
, 2 Linggong Road, Dalian 116024, P.R.C.
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Jian S. Dai
Jian S. Dai
Chair in Mechanisms and Robotics
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Lei Cui
Delun Wang
Professor of Mechanisms and Design
Dalian University of Technology
, 2 Linggong Road, Dalian 116024, P.R.C.e-mail: dlunwang@dlut.edu.cn
Jian S. Dai
Chair in Mechanisms and Robotics
J. Mech. Des. Oct 2009, 131(10): 101009 (8 pages)
Published Online: September 16, 2009
Article history
Received:
October 20, 2007
Revised:
August 3, 2009
Accepted:
August 4, 2009
Published:
September 16, 2009
Citation
Cui, L., Wang, D., and Dai, J. S. (September 16, 2009). "Kinematic Geometry of Circular Surfaces With a Fixed Radius Based on Euclidean Invariants." ASME. J. Mech. Des. October 2009; 131(10): 101009. https://doi.org/10.1115/1.3212679
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