Origami microbots: Centuries-old artform guides cutting-edge advances in
tiny machines
Engineers create centimeter-sized robots capable of more than ever before


Date:
July 30, 2020
Source:
University of Michigan
Summary:
Origami principles can unlock the potential of the smallest robots,
enhancing speed, agility and control in machines no more than a
centimeter in size.



FULL STORY ========================================================================== Origami principles can unlock the potential of the smallest robots,
enhancing speed, agility and control in machines no more than a centimeter
in size.


========================================================================== University of Michigan researchers have demonstrated that behavioral rules underpinning the Japanese art of folding can expand the capabilities of
these machines, creating potential for greater use in fields as diverse
as medical equipment and infrastructure sensing.

"We've come up with a new way to design, fabricate and actuate microbots,"
said Evgueni Filipov, U-M assistant professor of civil and environmental engineering. "We've been the first to bring advanced origami folding capabilities into one integrated microbot system." Their bots can form
one shape, complete a task, then reconfigure into a second shape for an additional task, and so on.

The latest research from the team, which includes Kenn Oldham, a U-M
professor of mechanical engineering, Ph.D. student Yi Zhu and graduate
research assistant Mayur Birla, appears in Advanced Functional Materials.

To date, most microbots have limited movements, which hampers their
ability to perform useful tasks. To increase their range of motion,
they need to be able to fold at large angles. U-M's team has created
microbots that can fold as far as 90 degrees and more. Larger folds
allow microbots to form more complex shapes.



========================================================================== U-M's unique approach enables its microbots to complete their range of
motion up to 80 times per second, a faster pace than most can operate.

Microbots using origami principles often require an outside stimulus to activate, such as heat inside a body or a magnetic field applied to the microbot. U-M's utilize a layer of gold and a layer of polymer that act
as an onboard actuator -- meaning no outside stimulus is needed.

While the microbots are currently controlled by a tether, eventually,
an onboard battery and a microcontroller will apply an electric current
in the systems.

"When current passes through the gold layer, it creates heat, and we use
heat to control the motions of the microbot," Filipov said. "We drive
the initial fold by heating the system, then we unfold by letting it
cool down.

"To get something to fold and stay folded, we overheat the system. When
we overheat, we can program the fold -- change where it comes to rest."
These capabilities allow microbots to function elastically and plastically
- - giving them the ability to recover their original shape.

The research was supported by the Defense Advanced Research Projects
Agency and the U-M College of Engineering Dean's Fellowship.


========================================================================== Story Source: Materials provided by University_of_Michigan. Note:
Content may be edited for style and length.


========================================================================== Journal Reference:
1. Yi Zhu, Mayur Birla, Kenn R. Oldham, Evgueni T. Filipov. Elastically
and
Plastically Foldable Electrothermal Micro‐Origami for
Controllable and Rapid Shape Morphing. Advanced Functional
Materials, 2020; 2003741 DOI: 10.1002/adfm.202003741 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2020/07/200730161027.htm

--- up 2 weeks, 1 day, 1 hour, 54 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (1337:3/111)