
Cocoon: Soft Gripper
Project Date
Dec 2025
Course/Company
ME303: Soft Robotics
Scope
CAD, Soft Fabrication, FEA
Timeline
4 weeks
Tools Used
NX, OnShape, ABAQUS FEA, MATLAB
Project Overview + Demo Video
Many grippers rely on rigid point contacts, which can bruise, crush, or drop fragile, deformable, or living targets—especially under small misalignments or limited user dexterity. Off-the-shelf reacher-grabbers have the same issue: stiff pinching jaws that are hard to aim and unforgiving with delicate items. We address this with a soft pneumatic gripper designed to wrap rather than pinch. By tuning a lattice of internal air pockets, the actuator curls to “cocoon” an object, spreading forces over a larger area and reducing peak pressure while tolerating pose and control errors. This project investigates how to optimize that pneumatic lattice for gentle, enveloping grasps and integrate it into a simple, syringe-driven handheld device for safer rescue handling and more intuitive assistive gripping.
Performance Evaluation

Initial Design + Iteration



Final CAD Parameters
FEA Simulation


Fabrication




