Abstract
In order to improve the flight performance of collapsible aircrafts, a novel mechanism of bionic foldable wings of beetle is designed based on the four-plate mechanism theory. The folding and unfolding movements of the bionic foldable wings are driven by motor and torsion hinges. Based on the D-H method, a kinematic model of wings is established to analyze the dihedral angle of adjacent plates. The folding ratio of an area in different plate creasing angles has been derived and calculated. Utilizing the kinematic and static models produced, as well as considering the folding ratio and output motor torque, the optimal physical parameters of folding wings are obtained. Dynamic models of rigid and flexible wings were established using ADAMS, and a motion simulation was performed. The relationship between dihedral angle and torque during the folding process of both rigid and flexible wings was obtained. The results provide a better understanding of the folding mechanism through the formulation of rigid-flexible wing analysis, as well as demonstrating a novel design of insect-mimicking artificial wings for small aerial vehicles.
Highlights
Bionics is one of the most important examples of researchers seeking better inventions and engineering designs
The bionic design of foldable wings is mainly concentrated structural considerations, which restricts the improvement of motion performance [8]
It is important to study on the bionic design and the motion mechanism of flexible foldable wings
Summary
Bionics is one of the most important examples of researchers seeking better inventions and engineering designs. It is important to study on the bionic design and the motion mechanism of flexible foldable wings. Haas and Wootton and Haas and Beutel proposed the four-board model for the folding and unfolding of insect hind wings [19, 20] but did not explain how to achieve it through mechanisms. Based on the four-plate model theory proposed by Haas and Wootton and Haas and Beutel, the mechanism of bionic foldable flexible wings of the beetle is designed in this paper. The dynamic model of the rigid and flexible wings is established using ADAMS, and a motion simulation of bionic foldable wings is performed
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