Towards Anthropomorphic Robotic Paper Manipulation

Christof Elbrechter
2020
The dream of robotics researchers to one day be able to build intelligent multi-purpose household robots that can aid humans in their everyday lives, with the inherent necessity that they are able to interact in general environments, demands that such robots have dramatically improved abilities for real-time perception, dynamic navigation, and closed-loop manipulation. While feed-forward robotic manipulation of rigid objects, ubiquitous in manufacturing plants, is well understood, a
more » ... interesting challenge for household robots is the ability to manipulate deformable objects such as laundry, packaging, food-items or paper. Given the fact that most objects in our homes are explicitly tuned to be grasped, used and manipulated by human hands, transitioning from traditional robot grippers to anthropomorphic robot hands seems like a necessity. Once we had narrowed our focus to anthropomorphic robot hands, a suitable domain of exploration within the possible set of deformable objects was sought. We chose paper manipulation, which poses many unsolved challenges along the conceptional axes of perception, modeling and robot control. On reflection, it was an excellent choice as it forced us to consider the peculiar nature of this every- day material at a very deep level, taking into consideration properties such as material memory and elasticity. We followed a bottom-up approach, employing an extensible set of primitive and atomic interaction skills (basic action primitives) that could be hierarchically combined to realize ever increasingly sophisticated higher level actions. Along this path, we conceptualized, implemented and thoroughly evaluated three iterations of complex robotic systems for the shifting, picking up and folding of a sheet of paper. Which each iteration it was necessary to significantly increase the abilities of our system. While our developed systems employed an existing bi-manual anthro- pomorphic robot setup and low level robot control interface, all visual-perception and modeling related to [...]
doi:10.4119/unibi/2942199 fatcat:3kzt3dbbqjgslaqmppnj2nx7jq