Fluidic feedback for soft actuators: an electronic-free system for sensing and control.
Shuyu Wang1,2, Haiqian Zhen1, Shuaiyang Duan1
1College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, People's Republic of China.
Bioinspiration & Biomimetics
|December 13, 2024
Summary
This study introduces an electronic-free soft actuator system for pneumatic soft robots. It uses a fluidic strain sensor for proprioception, enabling basic sensorimotor control without external electronics.
Area of Science:
- Robotics
- Materials Science
- Biomimetics
Background:
- Pneumatic soft robotics is advancing but often relies on rigid components, limiting flexibility.
- Existing soft control systems lack real-time sensory feedback, hindering adaptability.
- There is a need for electronic-free control in soft robotics.
Purpose of the Study:
- To develop an electronic-free soft actuator system with integrated sensing and control.
- To achieve basic sensorimotor behaviors in soft actuators using only fluidic components.
- To explore biomimetic control strategies inspired by biological systems.
Main Methods:
- Designed a soft actuator incorporating a fluidic strain sensor for proprioception.
- Detected stretching and compression via changes in air impedance.
- Integrated the sensor with a pneumatic valve for closed-loop control.
- Implemented open-loop and closed-loop motion modes inspired by biological systems.
Main Results:
- Demonstrated an electronic-free soft actuator capable of basic sensorimotor functions.
- Achieved cyclic movement and sensory feedback-regulated motion control.
- Utilized 'material intelligence' for autonomous control.
- Showcased the potential for multi-limb systems.
Conclusions:
- The proposed system offers a pathway towards fully fluidic soft robots.
- This electronic-free approach enhances the natural flexibility and adaptability of soft actuators.
- The biomimetic design enables sophisticated control using only fluidic principles.
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