A minimally designed soft crawling robot for robust locomotion in unstructured pipes

Area of Science:

• Robotics
• Materials Science
• Mechanical Engineering

Background:

• Soft robots offer versatile locomotion capabilities.
• Navigating unstructured and confined spaces remains a challenge for robots.

Purpose of the Study:

• To present a minimally designed soft crawling robot (SCR) for robust locomotion in unstructured pipes.
• To investigate the SCR's gait pattern and propulsion mechanism.

Main Methods:

• Experimental analysis of gait patterns.
• Finite element analysis (FEA) to understand locomotion mechanics.
• Testing in pipes with varying geometries, materials, and surface topologies.

Main Results:

• The SCR demonstrated robust locomotion in narrow and spiked pipes.
• FEA revealed that forward propulsion is generated by asymmetric mechanical properties.
• The robot successfully squeezed through pipes smaller than its own cross-section.

Conclusions:

• The developed SCR exhibits effective locomotion in challenging pipe environments.
• The findings provide insights into soft robot design for confined space exploration.
• This work can inspire new soft robot designs for applications in pipelines and biological canals.