Adaptive Centipede Walking via Synergetic Coupling Between Decentralized Control and Flexible Body Dynamics

Area of Science:

• Biophysics
• Robotics
• Locomotion Science

Background:

• Multi-legged animals like centipedes exhibit remarkable adaptability to unstructured terrain.
• Previous research isolated the roles of leg control and body flexibility in locomotion.
• The integrated mechanism of adaptive locomotion remains incompletely understood.

Purpose of the Study:

• To elucidate the coupled mechanisms of adaptive leg control and body flexibility in centipede locomotion.
• To develop a neuromechanical model of centipede walking on rough terrain.
• To identify the essential components for adaptive locomotion in multi-legged animals.

Main Methods:

• Behavioral experiments observing centipede locomotion on dynamic terrain.
• Development of a physical centipede model incorporating flexible bodies and legs.
• Implementation of decentralized control mechanisms based on ground contact sensing.

Main Results:

• Ground contact sense was vital for rhythmic leg motion and inter-leg footfall coordination.
• The neuromechanical model replicated typical gaits on flat terrain and adaptive gap crossing.
• Locomotor performance degraded significantly with disabled leg control or a rigid body.

Conclusions:

• Both adaptive leg control and body flexibility are essential for robust locomotion on complex terrains.
• The proposed model captures key mechanisms of adaptive centipede walking.
• Findings can inform the design of adaptable multi-legged robots for irregular environments.