@article{IonLindlbauerHerholzetal.2019,
  author    = {Ion, Alexandra and Lindlbauer, David and Herholz, Philipp and Alexa, Marc and Baudisch, Patrick Markus},
  title     = {Understanding Metamaterial Mechanisms},
  series = {Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems},
  journal   = {Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems},
  publisher = {Association for Computing Machinery},
  address   = {New York},
  isbn      = {978-1-4503-5970-2},
  doi       = {10.1145/3290605.3300877},
  pages     = {14},
  year      = {2019},
  abstract  = {In this paper, we establish the underlying foundations of mechanisms that are composed of cell structures-known as metamaterial mechanisms. Such metamaterial mechanisms were previously shown to implement complete mechanisms in the cell structure of a 3D printed material, without the need for assembly. However, their design is highly challenging. A mechanism consists of many cells that are interconnected and impose constraints on each other. This leads to unobvious and non-linear behavior of the mechanism, which impedes user design. In this work, we investigate the underlying topological constraints of such cell structures and their influence on the resulting mechanism. Based on these findings, we contribute a computational design tool that automatically creates a metamaterial mechanism from user-defined motion paths. This tool is only feasible because our novel abstract representation of the global constraints highly reduces the search space of possible cell arrangements.},
  language  = {en}
}
@misc{KovacsIonLopesetal.2019,
  author    = {Kovacs, Robert and Ion, Alexandra and Lopes, Pedro and Oesterreich, Tim and Filter, Johannes and Otto, Philip and Arndt, Tobias and Ring, Nico and Witte, Melvin and Synytsia, Anton and Baudisch, Patrick},
  title     = {TrussFormer},
  series = {The 31st Annual ACM Symposium on User Interface Software and Technology},
  journal   = {The 31st Annual ACM Symposium on User Interface Software and Technology},
  publisher = {Association for Computing Machinery},
  address   = {New York},
  isbn      = {978-1-4503-5971-9},
  doi       = {10.1145/3290607.3311766},
  pages     = {1},
  year      = {2019},
  abstract  = {We present TrussFormer, an integrated end-to-end system that allows users to 3D print large-scale kinetic structures, i.e., structures that involve motion and deal with dynamic forces. TrussFormer builds on TrussFab, from which it inherits the ability to create static large-scale truss structures from 3D printed connectors and PET bottles. TrussFormer adds movement to these structures by placing linear actuators into them: either manually, wrapped in reusable components called assets, or by demonstrating the intended movement. TrussFormer verifies that the resulting structure is mechanically sound and will withstand the dynamic forces resulting from the motion. To fabricate the design, TrussFormer generates the underlying hinge system that can be printed on standard desktop 3D printers. We demonstrate TrussFormer with several example objects, including a 6-legged walking robot and a 4m-tall animatronics dinosaur with 5 degrees of freedom.},
  language  = {en}
}