Design of a Depth Control Mechanism for an Anguilliform Swimming Robot

Area of Science:

• Robotics
• Bio-inspired Engineering
• Control Systems

Background:

• Anguilliform swimming robots mimic eel-like locomotion.
• Effective depth control is crucial for underwater robot navigation and mission success.
• Existing depth control methods present limitations in efficiency and maneuverability.

Purpose of the Study:

• To design and implement an effective depth control mechanism for an anguilliform swimming robot.
• To evaluate and compare different depth control strategies.
• To analyze the impact of the chosen mechanism on robot performance and component stress.

Main Methods:

• Investigated three depth control methods: out-of-plane thrust, head foil, and head/tail buoyancy control.
• Performed stress analysis on critical components of the buoyancy control system.
• Assessed the influence of the depth control mechanism on drive servo torque requirements.

Main Results:

• Buoyancy control at the head and tail was identified as the optimal method for depth and pitch control.
• The designed mechanism demonstrated effectiveness at typical robot forward speeds.
• Analysis provided insights into component stress and servo torque demands.

Conclusions:

• The head and tail buoyancy control system offers a superior solution for depth and pitch regulation in anguilliform robots.
• The design considerations and performance impacts are detailed for practical implementation.
• This research contributes to the advancement of autonomous underwater vehicle control.