Matthew Humphries for PCMag: Catching a fish can be tough, even if you are just trying to net a goldfish in a small tank. That's because the fish spots the danger and makes a swim for it. But what if you didn't need a net because you're controlling an invisible grabbing robot?
That's what Xuanhe Zhao, a professor of mechanical engineering at MIT succeeded in creating, but its applications go way beyond catching and releasing fish unharmed.
The robot is constructed of a transparent hydrogel, which is strong and durable but mostly made of water. As the video below explains, each arm of the robot is constructed from 3D-printed hollow cubes of hydrogel, which are then linked together. By injecting water using a syringe it's possible to make the arms curl and uncurl quickly in a grabbing motion. Cont'd...
Written by AZoRobotics: Most robots achieve grasping and tactile sensing through motorized means, which can be excessively bulky and rigid. A Cornell group has devised a way for a soft robot to feel its surroundings internally, in much the same way humans do.
A group led by Robert Shepherd, assistant professor of mechanical and aerospace engineering and principal investigator of Organic Robotics Lab, has published a paper describing how stretchable optical waveguides act as curvature, elongation and force sensors in a soft robotic hand.
Doctoral student Huichan Zhao is lead author of “Optoelectronically Innervated Soft Prosthetic Hand via Stretchable Optical Waveguides,” which is featured in the debut edition of Science Robotics. The paper published Dec. 6; also contributing were doctoral students Kevin O’Brien and Shuo Li, both of Shepherd’s lab. Cont'd.. .
From Leah Burrows and Harvard: A team of Harvard University researchers with expertise in 3-D printing, mechanical engineering, and microfluidics has demonstrated the first autonomous, untethered, entirely soft robot. This small, 3-D-printed robot — nicknamed the “octobot” — could pave the way for a new generation of such machines...
...Through our hybrid assembly approach, we were able to 3-D print each of the functional components required within the soft robot body, including the fuel storage, power, and actuation, in a rapid manner,” said Lewis. “The octobot is a simple embodiment designed to demonstrate our integrated design and additive fabrication strategy for embedding autonomous functionality.”... (full article)
The latest revolutionary robot isn’t the metallic, costly machine you’d expect: It’s squishy like Silly Putty, wireless, battery-less and made for pennies by a 3D printer.
Meet Octobot. It looks like a tiny octopus and is designed to mimic that slithery creature to get through cracks and tight places, making it ideal as a rescue robot.
A team at Harvard University has created a robot - actually about 300 of them, since they are so cheap to make - that is opposite of the common view of a robot. Soft, not hard. Flexibl,e not rigid. It’s not mechanical, nor electrical. It’s powered by fluids. The discovery is described, photographed and shown on video in the scientific journal Nature. Cont'd...
Cecilia Laschi for IEEE Spectrum: The sun was sparkling on the Mediterranean Sea on the afternoon when a graduate student from my lab tossed our prize robot into the water for the first time. I watched nervously as our electronic creation sank beneath the waves. But the bot didn’t falter: When we gave it the command to swim, it filled its expandable mantle with water, then jetted out the fluid to shoot forward. When we ordered it to crawl, it stiffened its eight floppy arms in sequence to push itself along the sandy bottom and over scattered rocks. And when we instructed it to explore a tight space beneath the dock, the robot inserted its soft body into the narrow gap without difficulty.
As a professor at the BioRobotics Institute at the Scuola Superiore Sant’Anna, in Pisa, Italy, I lead a team investigating soft robotics. This relatively new field of research has the potential to upend our ideas about what robots are capable of and where they can be useful. I chose to build robots that mimic the form of the octopus for two reasons. First, because they’re well suited to demonstrate the many advantages that come when a machine can flex and squish as needed. Also, it’s an excellent engineering challenge: An octopus with eight wiggly arms, which must work together in the face of complex hydrodynamic forces, is very difficult to design and control. Cont'd...
Phys.org: Soft robots do a lot of things well but they're not exactly known for their speed. The artificial muscles that move soft robots, called actuators, tend to rely on hydraulics or pneumatics, which are slow to respond and difficult to store.
Dielectric elastomers, soft materials that have good insulating properties, could offer an alternative to pneumatic actuators but they currently require complex and inefficient circuitry to deliver high voltage as well as rigid components to maintain their form—both of which defeat the purpose of a soft robot.
Now, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a dielectric elastomer with a broad range of motion that requires relatively low voltage and no rigid components. They published their work recently in Advanced Materials. Cont'd...
Robots should be safer and softer in order to make them more cooperative and execute tasks in close contact with humans. George Whitesides, Ph.D., a Core Faculty member at Harvard’s Wyss Institute for Biologically Inspired Engineering and the Woodford L. and Ann A. Flowers University Professor of Chemistry and Chemical Biology in Harvard University’s Faculty of Arts and Sciences (FAS), along with his team, has created a new actuator that moves like human skeletal muscles by using vacuum power for automating soft, rubber beams.
These actuators are soft and shock absorbing similar to real muscles, and do not pose any danger to their surroundings or the human beings working along with them or the future robots containing them. This study was published in the June 1 issue of the Advanced Materials Technologies journal. Cont'd...
Jon Excell for The Engineer: Designed by a team at the Max Planck Institute for Intelligent Systems in Stuttgart, the new device is claimed to have considerable advantages over existing pneumatically-powered soft actuators as it doesn’t require a tether.
The device consists of a dielectric elastomer actuator (DEA): a membrane made of hyperelastic material like a latex balloon, with flexible (or ‘compliant’) electrodes attached to each side.
The stretching of the membrane is regulated by means of an electric field between the electrodes, as the electrodes attract each other and squeeze the membrane when voltage is applied. By attaching multiple such membranes, the place of deformation can be shifted controllably in the system. Air is displaced between two chambers.
The membrane material has two stable states. In other words, it can have two different volume configurations at a given pressure without the need to minimize the larger volume. Thanks to this bi-stable state, the researchers are able to move air between a more highly inflated chamber and a less inflated one. They do this by applying an electric current to the membrane of the smaller chamber which responds by stretching and sucking air out of the other bubble. Cont'd...
Gordon Hunt for SiliconRepublic: Pioneered in Ireland by the likes of Dr Dónal Holland, with a plethora of departments in Harvard University in the US involved, the Soft Robotics Toolkit has gone on to foster significant interest in an area exploding into the mainstream.
More than 76,000 people have engaged with the service since it was created, represented across 150 different countries, with the toolkit identified as having made one of the most significant contributions to the development of the nascent industry to date.
While robotics engineering used to focus much more attention on creating the rigid, hard-bodied prototypes like Bender from Futurama, for example, lately there has been a push towards soft, malleable structures that take their inspiration from nature. Cont'd...
By Adam Zewe for Harvard News: If you have a soft spot for robotics, this competition is right up your alley.
The 2016 Soft Robotics Competitions offer anyone with an interest in robotics the chance to design and build their own soft robot using the resources available in the open-source Soft Robotics Toolkit.
Now in its second year, the competition was developed by Conor Walsh, assistant professor of mechanical and biomedical engineering at the Harvard John A. Paulson School of Engineering and Applied Sciences, and Dónal Holland, visiting lecturer in engineering sciences, as a way to encourage individuals to take advantage of the resources provided in the Soft Robotics Toolkit.
The toolkit, which incorporates contributions from researchers from Harvard and other institutions, provides a set of intellectual tools that one can use to design and construct a robot using soft, flexible materials. It includes resources such as step-by-step instructions on building actuators and sensors, lists of suggested materials, and how-to fabrication videos.
The ultimate goal of the competition is to encourage others to find innovative applications for soft robotics technology and continue expanding interest in this relatively new field. Cont'd...
Dutch Design Week 2015: Delft University of Technology graduate Rob Scharff has created a soft robotic limb that can shake hands with people.
The hand was created as part of Scharff's Soft Robotics research project – which focuses on the ways robots can be integrated with more tactile materials, and so improve robot-human interactions. Cont'd...
BY HANNAH ROSE MENDOZA for 3DPrint.com: Soft robotics is a relatively new field of research that aims to create flexible robots that are more easily adaptable to human interaction. Often, the forms of these creations and the mechanics of their movement are inspired by a close study of nature in an effort to ‘go organic’ with machines. 3D printing with flexible filament is one way in which this integration of robot and movement is taking on a flexible aspect.
For this particular installation, titled Exo-biote, the National Institute for Research in Computer and Control and the Department of Science and Visual Culture at the Imaginarium worked together, with support from Neuflize Bank, to create a robot organism that embodied the formal typologies and demonstrated the possibilities for movements in soft robots. After all, some of nature’s most amazing machines have nearly entirely soft bodies – think of the octopus, for example, able to lift, carry, walk, swim, shape change, camouflage itself, and fit through a tube no bigger than a quarter! Cont'd...
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