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Archives for 2017
Donghyun Kim Successfully Defends his PhD Thesis
PhD Dissertation on Intelligent Collision Management in Dynamic Environments for Human-Centered Robots
This thesis, written by PhD student Kwan Suk Kim posits that no matter how hard we try, collisions will always happen, and therefore we need to confront and study them both during autonomous navigation or dexterous manipulation. Chapter 5 connects to the question of whether “it is okay for robots to stop objects or other robots that are about to run into people?”
Various videos of this dissertation are shown below:
Paper on Liquid Cooled Viscoelastic Robotic Systems
Liquid Cooled Viscoelastic actuators are aimed at fielding human-centered lightweight robot structures with high payload capabilities and high mechanical robustness. This technology excels at the following five axes: energy efficiency, torque density, mechanical robustness, position and force controllability.
Congratulations to Rachel for this featured article from NASA
IJRR Paper on Theory of Dynamic Locomotion – arXiv Preprint Available
Kwan Suk Kim Successfully Defends his PhD Thesis
Steven’s summer project with NASA JSC, IHMC and U. Michigan on Intuitive Whole-Body Control of Valkyrie!
This video summarizes the deployment of applications on Valkyrie performed by Steven Jens Jorgensen from the U. of Texas at Austin and other researchers at NASA, IHMC, and U. Michigan. Given desired end-effector poses, a nonlinear optimization routine is used to solve the whole-body Inverse Kinematics (IK) of NASA’s Valkyrie robot while satisfying balance constraints. The joint position solutions are converted to the appropriate messages and are sent to IHMC’s controller interface, which interpolates between the robot’s initial (current) configuration to the desired configuration using third-order functions (polynomial for positions and a hermite curve for orientations). By specifying just the hand pose, a preliminary grasp planner uses the Whole-body IK solver to command Valkyrie’s hand to the desired pose. The Whole-body work is a collaboration between NASA and the Human-Centered Robotics Lab (HCRL) at the University of Texas at Austin. The grasp planner is from The Laboratory for Progress at the University of Michigan. This work was partially supported by a NASA Space Technology Research Fellowship (NSTRF) under the grant number NNX15AQ42H.
Behold, the Draco liquid cooled compliant robotic leg prototype
The video below shows the new Draco liquid cooled prototype leg produced as a collaboration between the Human Centered Robotics Lab and Apptronik Systems.. We have developed a new liquid cooled viscoelastic actuator capable of significantly surpassing the mechanical power of legged systems with convection cooling. The leg was presented during the Office of Naval Research S&T Expo in Washington DC.