A General Kinematic Model for Multimodal Locomotion in Bioinspired Robots

Area of Science:

• Biomechanics
• Robotics
• Animal Locomotion

Background:

• Animal locomotion displays significant diversity across species like fish, snakes, and octopuses.
• Existing kinematic models are insufficient to capture the full spectrum of animal movement strategies.
• Understanding animal locomotion is crucial for biomechanics research and developing advanced bioinspired robots.

Purpose of the Study:

• To propose a general kinematic model capable of describing multimodal animal locomotion.
• To develop a motion optimization framework for bionic robots inspired by animal movement.
• To enhance the maneuverability of bioinspired robots with diverse actuation mechanisms.

Main Methods:

• Integration of the curvature equation with a nonlinear oscillator to form a general kinematic model.
• Parameter adjustment within the model to achieve transitions between different animal locomotion patterns.
• Translation of the kinematic model into a motion control algorithm and virtual simulation for optimization.

Main Results:

• The proposed model demonstrates versatility, adapting its morphology to mimic various animal gaits.
• A motion optimization framework was created, simplifying multimodal control for bionic robots.
• Validation on a robotic fish successfully demonstrated cruising and complex turning maneuvers.

Conclusions:

• The developed general kinematic model is the most versatile to date for describing multimodal animal locomotion.
• The methodology provides a foundation for advancing bionic motion studies and the development of sophisticated bioinspired robots.
• The framework significantly enhances robotic maneuverability and simplifies control complexities.