Work

Toward More Autonomous Soft Robots: Development and Characterization of a 3D‐Printed Pneumatic Contact Sensor for a Six‐Legged Soft Robotic Walker

Year: 2025

Type: article

Abstract: Sensory feedback systems allow soft robots to interact and respond to their environment through embedded or external sensors. These sensors often rely on electronic components for signal interpretation and processing, which increases system complexity, reduces robustness under hazardous conditions, and limits the adaptability of the robots. Reducing complexity and improving adaptability in soft robots requires the development of electronics‐free control systems. A 3D‐printed, electronics‐free sensory system is integrated into a six‐legged soft robot, increasing its adaptability by enabling obstacle detection and directional change of locomotion using pneumatic logic gates. Pneumatic systems enable smooth, nature‐like movements and can operate safely in environments where electronics might fail. The results show rapid sensor response times (1.41–1.52 s), low required input forces (1.07–4.62 N) of the sensor, and walking speeds up to 0.17 body lengths per second. Operating at 225 kPa with 13.64 l n min −1 of compressed air in tethered mode, the robot also functions autonomously with a CO 2 cartridge. Integrated pneumatic grippers enhance their utility for object retrieval. The design achieves a new level of autonomy and versatility, advancing electronics‐free control systems, while maintaining cost efficiency. These findings lay the foundation for future innovations in increasingly autonomous electronic‐free soft robots.

Source: Advanced Intelligent Systems

DOI: 10.1002/aisy.202500430