Centrode
Path traced by the point fixed to a body undergoing planar movement
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A centrode, in kinematics, is the path traced by the instantaneous center of rotation of a rigid plane figure moving in a plane. There are two types of centrodes: a space or fixed centrode, and a body or moving centrode. The moving centrode rolls without slip on the fixed centrode.
The indigo dot draws both centrodes, and also indicates where the moving centrode is in contact with and is rolling around the fixed centrode.
Gallery
Construction of the fixed centrode for a 4-bar linkage:
The cyan link indicates the link the centrode (pink) is drawn relative to.
Construction of the moving centrode for a 4-bar linkage:
The cyan link indicates the link the centrode (orange) is drawn relative to. An additional diagram is shown on the right to show the cyan link fixed in place for reference.
See also
References
Homer D. Eckhardt Kinematic Design of Machines and Mechanisms, McGraw-Hill (1998) p. 63 ISBN 0-07-018953-6. Theory of Machine [M.Irfan (NFC IET Multan) Contact# (03421713488)]
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