Towards shape-adaptive attachment design for wearable devices using granular jamming

Area of Science:

• Robotics
• Materials Science
• Biomechanics

Background:

• Attaching wearable devices to the human body presents challenges due to varying and changing body shapes.
• Existing solutions often struggle with comfort, function, and adaptability.

Purpose of the Study:

• To introduce and evaluate a granular jamming approach for adaptable wearable device attachments.
• To investigate design parameters influencing the stability of granular jamming interfaces.

Main Methods:

• Developed a granular jamming system using a granule-filled membrane that stiffens via vacuum-induced friction.
• Created a bench prototype with modular jamming structures attached to objects of varying shapes and sizes.
• Experimentally tested the interface's resistance to lateral forces under different conditions.

Main Results:

• Granular jamming significantly increased structure stability, with forces ranging from 1.73 to 2.16 N.
• Optimal performance was achieved using three modules, high suspension force, and low membrane infill (~25%).
• The system demonstrated adaptability to complex shapes in a soft state and rigidity in a jammed state.

Conclusions:

• Granular jamming offers a viable solution for creating adaptable and stable wearable attachments.
• The findings provide a foundation for developing next-generation wearable robotic systems and human-machine interfaces.
• Further research can explore advanced materials and control strategies for enhanced performance.