Microstructures using carbon fiber composite honeycomb beams
View Patent ↗A drive assembly for a wing of a micromechanical flying insect. The drive assembly comprises a honey comb structure. A method for flying a micromechanical flying insect comprising moving a wing with a drive assembly having a stiffness to weight ratio greater than about 16×10 10 N/mKg.
1. A drive assembly for a wing of a micromechanical flying insect comprising an actuator; a crank coupled to the actuator; and a linkage assembly coupled to the crank, said linkage assembly comprising a support platform having an aperture where through said actuator extends, a first flexure connection connected to the support platform, a first bar member connected to the first flexure, a second flexure connection connected to the first bar, and a second bar member connected to the second flexure connection.
2. The drive assembly of claim 1 wherein said linkage assembly comprises a stiffness to weight ratio greater than about 16×10 10 N/mKg.
3. The drive assembly of claim 1 , wherein the actuator includes a piezoelectric layer, a bonding layer, and an elastic layer coupled to the bonding layer.
4. The drive assembly of claim 3 wherein said elastic layer comprises from about 30% by vol. to about 80% carbon, and from about 20% by vol. to about 70% by vol. epoxy resin.
5. The drive assembly of claim 1 wherein said linkage assembly comprises a structure having a longitudinal Young's modulus greater than about 200 GPa, and a density less than about 2200 kg/m 3 .
6. The drive assembly of claim 1 additionally comprising a third flexure connection connected to the second bar, a lug plate connected to the third flexure connection, and a fourth flexure connection connected to the lug plate and to the support platform.
7. The drive assembly of claim 6 additionally comprising a differential assembly coupled to the fourth flexure connection.
8. The drive assembly of claim 6 additionally comprising a differential assembly coupled to the lug plate.
9. A drive assembly for a wing of a micromechanical flying insect comprising an actuator; a crank coupled to the actuator; and a linkage assembly coupled to the crank, said linkage assembly comprising a first face sheet, a core supporting the first face sheet, a second face sheet bound to the core, a polyester flexure disposed against the second face sheet, and a third face sheet disposed against the polyester flexure.
10. The drive assembly of claim 5 wherein said linkage assembly comprises a structure having a ply thickness ranging from about 13 μm to about 50 μm.
11. The drive assembly of claim 5 wherein said linkage assembly comprises a structure having a ply thickness ranging from about 18 μm to about 40 μm.
12. The drive assembly of claim 5 wherein said linkage assembly comprises a structure having a ply thickness ranging from about 22 μm to about 30 μm.
13. The drive assembly of claim 5 wherein said linkage assembly comprises a structure having a ply thickness ranging from about 24 μm to about 28 μm.