China3D printingNet August 8th, researchers from the Massachusetts Institute of Technology (MIT) have developed a3D printingComplex actuator system.
The toolkit includes multi-objective topology optimization software for design synthesis and multi-material on-demand manufacturing for robotic actuators3D printing.
According to Subramanian Sundaram, a former PhD student at the Computer Science and Artificial Intelligence Laboratory (CSAIL), the system can create mechanisms that are “nearly impossible for humans to complete by hand,” especially in the aerospace field.
“Our ultimate goal is to automatically find the best design for any problem, and then use the output of our optimized design to make it.” Sundaram added.
To demonstrate this system, the researchers made floating water lilies with petals. These petals are equipped with actuators and hinges that can fold up in response to a magnetic field passing through a conductive liquid. Photo from Massachusetts Institute of Technology/
3D printingActuator
The actuator in the MIT study mechanically controls the robotic system in response to electrical signals that transmit black and white images at different angles.Earlier this year, a team from the MIT Media Lab developed Cilllia, which is a3D printingThe calculation method of hair structure can be used as a passive actuator for moving objects.
The university’s new actuator system is composed of soft and rigid polymers and a polymer composite of magnetic nanoparticles that respond to a magnetic field. Build a topology optimizer to control the placement of materials based on the properties of the materials and the generated voxel model.Equipped with customization of vat material3D printingThe machine is connected to a print head with hundreds of nozzles, which can be individually controlled to make actuators.
Inject droplets of a specified material with a size of 30 μm into their respective voxel positions, and then solidify layer by layer on the substrate.Through this process, MIT researchers3D printingAn actuator, when laid flat, depicts a self-portrait of Vincent Van Gogh. When tilted, it is activated and displays the famous Edward Munch painting “The Scream”.
3D printingThe action executor displays two famous paintings from different angles. Edited via MIT.
The system is based on an attribute library that randomly assigns different materials to different voxels. Usually during this process, the parameters are manually calculated to find the best design. Perform simulations to confirm the required layout directly and at an angle. When applying a magnetic field, adding, removing and moving around the brown magnetic voxels will change the angle of the actuator.
3D printingThe floating water lily is also created with an array of actuators and hinges equipped with petals. This allows the petals to fold in response to the magnetic field passing through the conductive fluid.
Sundaram pointed out that due to the new multi-material3D printingThe dimensions of technology and design have become more complex. “What you are left with is the so-called’combination explosion.’ You basically have a lot of combinations of materials and properties, and you don’t have the opportunity to evaluate every combination to create the best structure.”
Researchers believe that this automated process can advance the design of large structures, such as aircraft wings. At present, researchers have begun to decompose the aircraft wing into smaller voxel blocks to optimize the design of its weight, lift and other indicators.
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