Underwater Swimmers

Underwater Swimmers

Underwater swimmers present unique opportunities for using bodily reconfiguration for self-propulsion. Origami-inspired designs are low-cost, fast to fabricate, robust, and can be used to create compliant mechanisms useful in energy-efficient underwater locomotion. In this project, we demonstrate an origami-inspired robot that can change its body shape to ingest and expel water, creating a jet that propels it forward similarly to cephalopods. We use the magic ball origami pattern, which can transform between ellipsoidal (low volume) and spherical (high volume) shapes. A custom actuation mechanism contracts the robot to take in fluid, and the inherent mechanics of the magic ball returns the robot to its natural shape upon release. We describe the design and control of this robot and verify its locomotion in a water tank. The resulting robot is able to move forward at 6.7 cm/s (0.2 body lengths/s), with a cost of transport of 2.0. Video:

Cynthia Sung

Gabel Family Term Assistant Professor, MEAM; Secondary faculty, CIS & ESE

Dongsheng Chen

Robotics MSE '19; PhD, MEAM

Siddharth Panchanadam

Robotics MSE - Accelerated Master's

Underwater Swimmers