Researchers at Carnegie Mellon University introduce a computational method for complex telescoping structures, set for the burgeoning world of 3-D fabrication
A new tool for computational design allows users to turn any 3D shape into a collapsible telescoping structure. New mathematical methods developed by researchers at Carnegie Mellon University capture the complex and diverse properties of such structures, which are valuable for a variety of applications in 3D fabrication and robotics--particularly where mechanisms must be compact in size and easily deployable.
The research, "Computational Design of Telescoping Structures," led by Carnegie Mellon Professors Stelian Coros and Keenan Crane and PhD student Christopher Yu, will be presented at the annual SIGGRAPH conference, 30 July to 3 August in Los Angeles. The conference each year spotlights the most innovative in computer graphics research and interactive techniques worldwide.
Traditional telescopes are perfectly straight, and their ability to expand from a compact form into a much bigger structure has been widely exploited in engineering design. So far, however, there hasn't been a systematic study of the types of shapes that can be modeled by telescoping structures, nor practical tools for telescopic design. At a recent maker faire, the researchers came across a set of retractable toy claws, fashioned after the popular X-Men character, Wolverine. Inspired by the claws' curved shape, they began to explore the idea of automating the design of telescoping structures, exploring a wide variety of shapes that could come out of a basic telescope model.
Far beyond the example of a typical straight telescope used for star gazing, other collapsible, deployable structures can benefit from a curved or twisted telescoping design: camping equipment such as tents or large outdoor structures used for music festivals; a heart stent that is tiny at the point of insertion but expands once it is surgically placed; or a robotic arm that can retract itself into a cylinder shape the size of a Coke can, enabling user portability and versatility.
"Among deployable mechanisms, telescopes are very interesting. Once you expand them, they are very flexible and you can make a lot of different shapes, all with the same telescope," notes Crane, coauthor and Assistant Professor of Computer Science and Robotics at Carnegie Mellon. "We wanted to know what are all the possible shapes you can make from a telescoping structure."
The team's mathematical model of telescoping structures starts with three common-sense requirements: each shell must be manufacturable from rigid material (like metal), the telescope must be able to extend and contract without bumping into itself, and there should be no empty wasted space between nested pieces. These basic requirements led to a key geometric insight: the complicated mechanical description of a telescope can be replaced by simple geometric curves that exhibit a constant amount of bend but arbitrary "twist," significantly generalizing the straight telescopes found in typical engineering designs. The team successfully prototyped applications in 3D fabrication and robotics, using their novel system to design both a flexible, controllable robot arm, and a tent-like structure that grows to several times its original volume.
The research was supported by an NSF Graduate Research Fellowship. At Carnegie Mellon, Crane also directs the Geometry Collective, Stelian Coros is assistant professor in the Robotics Institute and Christopher Yu is a PhD student in computer science whose research is in computer graphics.
About SIGGRAPH 2017
The annual SIGGRAPH conference is a five-day interdisciplinary educational experience in the latest computer graphics and interactive techniques, including a three-day commercial exhibition that attracts hundreds of companies from around the world. The conference also hosts the international SIGGRAPH Computer Animation Festival, showcasing works from the world's most innovative and accomplished digital film and video creators. Juried and curated content includes outstanding achievements in time-based art, scientific visualization, visual effects, real-time graphics, and narrative shorts. SIGGRAPH 2017 will take place from 30 July-3 August 2017 in Los Angeles. Visit the SIGGRAPH 2017 website or follow SIGGRAPH on Facebook, Twitter, YouTube, or Instagram for more detailed information.
About ACM SIGGRAPH
The ACM Special Interest Group on Computer Graphics and Interactive Techniques is an interdisciplinary community interested in research, technology, and applications in computer graphics and interactive techniques. Members include researchers, developers, and users from the technical, academic, business, and art communities. ACM SIGGRAPH enriches the computer graphics and interactive techniques community year-round through its conferences, global network of professional and student chapters, publications, and educational activities.
ACM, the Association for Computing Machinery, is the world's largest educational and scientific computing society, uniting educators, researchers, and professionals to inspire dialogue, share resources, and address the field's challenges. ACM strengthens the computing profession's collective voice through strong leadership, promotion of the highest standards, and recognition of technical excellence. ACM supports the professional growth of its members by providing opportunities for lifelong learning, career development, and professional networking.
Dan Harary | EurekAlert!
Controlling robots with brainwaves and hand gestures
20.06.2018 | Massachusetts Institute of Technology, CSAIL
Innovative autonomous system for identifying schools of fish
20.06.2018 | IMDEA Networks Institute
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
21.06.2018 | Life Sciences
21.06.2018 | Earth Sciences
21.06.2018 | Life Sciences