AIMC Topic: Animal Fins

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Platform development and gliding optimization of a robotic flying fish with morphing pectoral fins.

Bioinspiration & biomimetics
The aquatic-aerial robot with the free interface crossing can enhance adaptability in complex aquatic environments. However, its design is extremely challenging for the striking discrepancies in propulsion principles. The flying fish in nature exhibi...

Soft dorsal/anal fins pairs for roll and yaw motion in robotic fish.

Bioinspiration & biomimetics
Fish has primarily served as a model for many bio-inspired underwater robots. However, most of the work on fish-inspired robots is focused on propulsion and turning in the horizontal plane. In this paper, we present our work on the 3D motion of bio-i...

Motion mechanism and thrust characteristics of amphibious robots with long fin fluctuation for propulsion on hard level ground.

Bioinspiration & biomimetics
This paper presents the principle of motion, mechanical modeling and key characteristics of the propulsive force of a new flexible-fin traveling wave propulsion mechanism used in an amphibious robot. Firstly, the form of motion and the basic propulsi...

Tunable stiffness in fish robotics: mechanisms and advantages.

Bioinspiration & biomimetics
One of the emerging themes of fish-inspired robotics is flexibility. Adding flexibility to the body, joints, or fins of fish-inspired robots can significantly improve thrust and/or efficiency during locomotion. However, the optimal stiffness depends ...

Reinforcement learning-based optimization of locomotion controller using multiple coupled CPG oscillators for elongated undulating fin propulsion.

Mathematical biosciences and engineering : MBE
This article proposes a locomotion controller inspired by black Knifefish for undulating elongated fin robot. The proposed controller is built by a modified CPG network using sixteen coupled Hopf oscillators with the feedback of the angle of each fin...

Design and experimental evaluation of the novel undulatory propulsors for biomimetic underwater robots.

Bioinspiration & biomimetics
Inspired by wide and elongated fins of aquatic species, robotic undulatory propulsors are developed to achieve advanced maneuverability. Through biological observation, undulatory fins are typically comprised of more than 100 fin rays to propagate co...

Cartilage structure increases swimming efficiency of underwater robots.

Scientific reports
Underwater robots are useful for exploring valuable resources and marine life. Traditional underwater robots use screw propellers, which may be harmful to marine life. In contrast, robots that incorporate the swimming principles, morphologies, and so...

Effects of root chord movement on thrust generation of oscillatory pectoral fins.

Bioinspiration & biomimetics
Fin kinematics is the key to thrust generation of oscillatory pectoral fins of manta rays. This could be one of the main reasons that fin designs of robotic manta rays are becoming more complex to simulate the fin kinematics more closely so as to gen...

Fish-like three-dimensional swimming with an autonomous, multi-fin, and biomimetic robot.

Bioinspiration & biomimetics
Fish migrate across considerable distances and exhibit remarkable agility to avoid predators and feed. Fish swimming performance and maneuverability remain unparalleled when compared to robotic systems, partly because previous work has focused on rob...

Artificial lateral line based relative state estimation between an upstream oscillating fin and a downstream robotic fish.

Bioinspiration & biomimetics
The lateral line enables fish to efficiently sense the surrounding environment, thus assisting flow-related fish behaviors. Inspired by this phenomenon, varieties of artificial lateral line systems (ALLSs) have been developed and applied to underwate...