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Published on: December 24, 2014
Environment-adaptive track mechanism with continuously transformable grousers
Hanbom Kim1, Yongho Kwon1, Hojoon Seo1
1School of Mechanical Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
Scientific Reports
|July 17, 2026
Summary
EATbot, an environment-adaptive tracked robot, introduces an arc-grouser mechanism for adaptive terrain mobility. This innovation enhances stability and performance across diverse environments, from smooth surfaces to challenging rough terrain and stairs.
Area of Science:
- Robotics
- Mechanical Engineering
- Terrain Mobility
Background:
- Conventional tracked robots face a trade-off between flat-ground smoothness and rough-terrain/stair-climbing capability due to fixed grouser profiles.
- This limitation hinders adaptability in complex and varied operational environments.
Purpose of the Study:
- To introduce EATbot, a novel environment-adaptive tracked robot.
- To present an arc-grouser mechanism that continuously modulates grouser protrusion for adaptive ground contact.
- To overcome the limitations of fixed-profile tracks in diverse terrains.
Main Methods:
- Development of an arc-grouser mechanism enabling continuous modulation of grouser protrusion.
- Creation of a kinematic model and virtual-work-based torque formulation to analyze mechanism behavior.
- Design optimization considering geometric, kinematic, and packaging constraints.
- Experimental validation through stair-climbing, driving stability, and payload transformation tests.
Main Results:
- The arc-grouser mechanism successfully adapted its ground-contact profile for different terrains.
- Stair-climbing tests demonstrated ascent up to a maximum equivalent inclination.
- Driving stability experiments showed significant RMS vibration reduction on both flat (5.1%) and rough terrain (87.9%).
- The robot demonstrated practical high-load operation up to 40 kg.
Conclusions:
- Continuous grouser-profile transformation effectively mitigates the trade-off between flat-ground smoothness and rough-terrain engagement.
- EATbot's arc-grouser mechanism enhances tracked locomotion adaptability and performance.
- The proposed mechanism offers a viable solution for robots operating in unpredictable environments.
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