Technique Uses Magnets, Light to Control and Reconfigure Soft Robots
August 6, 2019 | North Carolina State UniversityEstimated reading time: 2 minutes
Researchers from North Carolina State University and Elon University have developed a technique that allows them to remotely control the movement of soft robots, lock them into position for as long as needed and later reconfigure the robots into new shapes. The technique relies on light and magnetic fields.
“We’re particularly excited about the reconfigurability,” says Joe Tracy, a professor of materials science and engineering at NC State and corresponding author of a paper on the work. “By engineering the properties of the material, we can control the soft robot’s movement remotely; we can get it to hold a given shape; we can then return the robot to its original shape or further modify its movement; and we can do this repeatedly. All of those things are valuable, in terms of this technology’s utility in biomedical or aerospace applications.”
For this work, the researchers used soft robots made of a polymer embedded with magnetic iron microparticles. Under normal conditions, the material is relatively stiff and holds its shape. However, researchers can heat up the material using light from a light-emitting diode (LED), which makes the polymer pliable. Once pliable, researchers demonstrated that they could control the shape of the robot remotely by applying a magnetic field. After forming the desired shape, researchers could remove the LED light, allowing the robot to resume its original stiffness—effectively locking the shape in place.
By applying the light a second time and removing the magnetic field, the researchers could get the soft robots to return to their original shapes. Or they could apply the light again and manipulate the magnetic field to move the robots or get them to assume new shapes.
In experimental testing, the researchers demonstrated that the soft robots could be used to form “grabbers” for lifting and transporting objects. The soft robots could also be used as cantilevers, or folded into “flowers” with petals that bend in different directions.
“We are not limited to binary configurations, such as a grabber being either open or closed,” says Jessica Liu, first author of the paper and a Ph.D. student at NC State. “We can control the light to ensure that a robot will hold its shape at any point.”
In addition, the researchers developed a computational model that can be used to streamline the soft robot design process. The model allows them to fine-tune a robot’s shape, polymer thickness, the abundance of iron microparticles in the polymer, and the size and direction of the required magnetic field before constructing a prototype to accomplish a specific task.
“Next steps include optimizing the polymer for different applications,” Tracy says. “For example, engineering polymers that respond at different temperatures in order to meet the needs of specific applications.”
Suggested Items
Absolute EMS Successfully Recertifies ISO 9001:2015 and AS9100 Standards
03/26/2024 | Absolute EMS, Inc.Absolute EMS, Inc., an award-winning EMS provider of turnkey contract manufacturing services, is proud to announce the successful recertification of its ISO 9001:2015 and AS9100 Rev D SAE International Aerospace Standards.
Arlon EMC Receives IPC-4101 QPL Recertification
03/20/2024 | Arlon Electronic MaterialsArlon Electronic Materials has successfully completed an intensive two-day recertification audit by IPC Validation Services that examined Arlon’s manufacturing processes and testing procedures to assure that they are in conformance to the requirements of IPC-4101E-WAM1, the Specification for Base Materials for Rigid and Multilayer Printed Boards.
Northrop Grumman Honors Suppliers for Excellence
03/14/2024 | Northrop GrummanNorthrop Grumman Corporation honored more than 70 suppliers for their outstanding contributions in 2023. In an annual recognition event, the companies included women-, minority- and veteran-owned small businesses as well as those operating in underdeveloped areas.
Cicor Acquires TT Electronics IoT Solutions
03/04/2024 | Cicor Technologies Ltd.The Cicor Group has signed an agreement to acquire TT Electronics IoT Solutions Ltd, with three production sites in the UK and China.
AEM, Texas Aerospace Technologies Bolster Partnership for Latin America
02/26/2024 | AEM Corp.Canadian avionics manufacturer, Anodyne Electronics Manufacturing Corp. (AEM), is pleased to announce a partnership expansion with Texas Aerospace Technologies, a subsidiary of Texas Aerospace Services, to add AEM’s new MTP136D modern panel-mount P25 VHF FM Forest Service radio to its lineup of product offerings for their Latin American customers.