Strategies to Control Performance of 3D-Printed, Cable-Driven Soft Polymer Actuators: From Simple Architectures to...

Area of Science:

• Robotics and Materials Science
• Additive Manufacturing

Background:

• Soft actuators offer compliant and adaptable manipulation capabilities.
• Multimaterial 3D printing enables complex actuator designs.
• Cable-driven actuation provides a robust method for controlling soft robots.

Purpose of the Study:

• To investigate the performance of soft cable-driven polymer actuators fabricated using multimaterial 3D printing.
• To demonstrate methods for tuning the mechanical response and shape control of these actuators.
• To develop a soft polymer gripper for delicate object manipulation.

Main Methods:

• Utilizing multimaterial 3D printing to produce polymer actuators with embedded cables.
• Implementing architectural modifications such as stiff inserts, actuator sectioning, and cable channel shifting.
• Designing and manufacturing a prototype soft polymer gripper.

Main Results:

• Demonstrated flexible tuning of actuator mechanical response through architectural selection.
• Showcased strategies for achieving controllable deformation during weight lifting.
• Illustrated methods for reducing the required actuation force.
• Successfully developed a soft gripper capable of handling small, delicate objects.

Conclusions:

• Actuator architecture is a key factor in tuning the performance of soft cable-driven polymer actuators.
• The presented strategies offer versatile approaches for enhancing control and efficiency in soft robotic systems.
• These findings are applicable to various soft actuator technologies, including electroactive polymers.