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Minimalist analogue robot discovers animal-like walking gaits
Benjamin J H Smith1, James R Usherwood
1Author to whom any correspondence should be addressed.
Bioinspiration & Biomimetics
|December 24, 2019
Summary
This study presents a simple quadruped robot that walks without software, demonstrating how body geometry influences animal gait. The findings suggest minimal active control is needed for stable locomotion.
Area of Science:
- Robotics
- Biomechanics
- Animal Locomotion
Background:
- Investigating animal movement through simplified biomechanical robots.
- Understanding the fundamental principles of gait and locomotion.
Purpose of the Study:
- To present a controller-free quadruped robot.
- To explore the role of body geometry in emergent gaits.
- To validate theories on animal locomotion determinants.
Main Methods:
- Design and construction of a simple quadruped robot with leg-based switches.
- Utilizing pitching and rolling body movements for gait generation.
- Experimental analysis using high-speed video and pressure mats for kinematics and ground reaction forces.
Main Results:
- Emergent gait with consistent leg order, despite variable stride and stance times.
- Observed similarities between robot gait and primate/livestock gaits.
- Validation of body geometry's role in low-speed animal gait.
Conclusions:
- Steady-state locomotion can be achieved with minimal active control.
- Body geometry is a significant factor in determining animal gait at low speeds.
- Simple mechanical systems can replicate complex biological movements.
