Overview
Researchers at the Shenyang Institute of Automation (SIA) of the Chinese Academy of Sciences have engineered a soft robotic fish. This device integrates an electrohydraulically actuated system to enable both high-speed swimming and three-dimensional (3D) maneuverability. The development specifically targets the challenge of combining rapid propulsion with agility within soft robotic design frameworks.
Research Context
A persistent design challenge in soft robotics involves simultaneously achieving high-speed propulsion and maintaining maneuverability. Traditional approaches often necessitate trade-offs between these two performance characteristics. The robotic fish developed by the SIA team addresses this by incorporating specific design elements intended to overcome this limitation.
Approach
The soft robotic fish utilizes an electrohydraulically actuated system for its operational mechanics. Central to its design is a rigid–flexible coupled propulsion system. This system functions in conjunction with dynamic buoyancy regulation. The combination of these two elements allows the robot to achieve fast propulsion capabilities without compromising its ability to maneuver. The electrohydraulic actuation provides the power for movement, while the hybrid propulsion and buoyancy control enable precise adjustments in motion and depth.
Findings
The developed soft robotic fish demonstrated capabilities for high-speed swimming. Simultaneously, it exhibited agile three-dimensional maneuverability. This combination indicates that the integrated rigid–flexible coupled propulsion system alongside dynamic buoyancy regulation successfully mitigates the common trade-off between speed and agility in soft robotic designs.
Why This Matters
The development addresses a longstanding design challenge concerning the integration of fast propulsion with maneuverability in soft robotic systems. By combining a rigid–flexible coupled propulsion system with dynamic buoyancy regulation, the soft robotic fish provides a method to achieve both high-speed movement and agile three-dimensional maneuverability. This engineering solution demonstrates a pathway to overcome a fundamental limitation in the design of such systems.
Research Source
Shenyang Institute of Automation (SIA) of the Chinese Academy of Sciences