Soft, Compliant Tactile Robotic Manipulators

Abstract

When we look to the future of soft robotics and manipulation, we begin to look towards sensory-rich and compliant grasping mechanisms. Not only do we want to capitalize on the significant advantages in safety and adaptability that soft robots have, we also want to incorporate high-resolution tactile sensors, which will allow soft robots to perform more tasks. One such system is the GelSight sensor, which is low-cost, effective, and high-resolution. However, the integration of these camera-based sensors into compliant manipulators is difficult due to the rigidity of the sensor backing. This thesis explores the design of multiple different compliant high-resolution tactile manipulators, along with some examples of their real-world uses. The first such design incorporates a simple camera-based tactile sensor into an exoskeleton-covered soft robot with vision-based proprioception. A later design integrates full camera-based tactile sensing capabilities into a flexible Fin Ray structure. Finally, the designs culminate in a novel soft-rigid human-inspired robotic hand with continuous tactile sensing which is capable of grasping heavier objects and safely interacting with humans. The incorporation of high-resolution tactile sensors into soft, compliant robots brings us closer to developing new manipulators that could someday match or exceed the capabilities of human hands.