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Related Experiment Video

Updated: Apr 14, 2026

Rod-based Fabrication of Customizable Soft Robotic Pneumatic Gripper Devices for Delicate Tissue Manipulation

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Published on: August 2, 2016

A Hysteresis-Guided Pressure-Threshold Encoder for Soft Robots.

Weibin Xu¹, Tian Xu¹, Kuan Zhang¹

¹State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, China.

|April 13, 2026

Summary

This summary is machine-generated.

This study introduces a novel pressure-threshold encoder (PTE) for soft robots, enabling electronics-free control. The PTE reduces complex fluidic systems by converting single pressure inputs into multiple digital outputs, simplifying control.

Keywords:

fluidic encoders hysteresis tunability pneumatic valves scalable control soft robotics

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Area of Science:

Soft robotics and fluidic control systems.
Development of novel microfluidic components for robotics.

Background:

Fluidic circuits are key for electronics-free soft robot control.
Limited hysteresis tunability in fluidic valves restricts analog pressure input utilization, leading to complex digital control systems.

Purpose of the Study:

To develop a hysteresis-guided pressure-threshold encoder (PTE) for converting analog pressure inputs into multiple digital outputs.
To enable tunable hysteresis in fluidic valves for precise pressure detection and reduced system complexity.

Main Methods:

Designed and fabricated hysteresis-tunable valves (HTVs) to form the PTE.
Implemented two programming modes: automated sequencing via electronic devices and manual sequencing with mechanical regulators.
Integrated the PTE into digital fluidic circuits for scalability and compatibility testing.

Main Results:

The PTE effectively converts a single pressure input into multiple digital outputs with tunable resolution.
Demonstrated multiactuator control for soft joints and robotic hands using the PTE.
Reduced the number of external pressure lines required from n to 2.

Conclusions:

The developed PTE offers a scalable and compatible solution for compact, electronics-free soft robotic control.
This encoding method significantly simplifies fluidic control systems, enhancing their practicality.
The tunable hysteresis valves are crucial for precise pressure encoding in soft robotics.