Dragonfly (Sympetrum flaveolum) flight : kinematic measurement and modelling
The kinematics of the flapping hindwing of the dragonfly Sympetrum flaveolum is investigated. Several tracking points along the leading edge and trailing edge of the hindwing are recorded and studied using high-speed videography. By applying more tracking points along the leading edge around the...
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| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/85659 http://hdl.handle.net/10220/12975 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The kinematics of the flapping hindwing of the dragonfly Sympetrum flaveolum is investigated.
Several tracking points along the leading edge and trailing edge of the hindwing are
recorded and studied using high-speed videography. By applying more tracking points along
the leading edge around the nodus, it is shown that the leading edge is not one rigid piece,
but two pieces hinged at the nodus with physical constraint of forty degrees. Such
arrangement also eases the difficulties in rotating the wing during pronation by bending
the leading edge forward and flattening the wing. From the kinematic experiments, two
flapping patterns of the dragonfly wing are revealed as a simple figure-eight and a double
figure-eight flapping pattern. Kinematic modelling of the two flapping patterns is then
established by transforming the flapping motions into angular rotations about the pivoting
wing root in a local body-fixed spherical coordinate system. |
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