Results 81 to 90 of about 1,206,472 (190)

YOLO-PWSL-Enhanced Robotic Fish: An Integrated Object Detection System for Underwater Monitoring

Applied Sciences
In recent years, China has been promoting aquaculture, but extensive water pollution caused by production activities and climate changes has resulted in losses exceeding 4.6 × 107 kg of aquatic products.
Lingrui Lei, Ying Tang, Weidong Zhang, Quan Tang, Haichi Hao   +4 more
doaj   +1 more source

Experimental Analysis of Pectoral and Caudal Fin Synergistic Propulsion in a Bionic Robotic Fish [PDF]

Journal of Applied Fluid Mechanics
This study introduces a biomimetic robotic fish prototype incorporating: (1) a double-articulated caudal fin for enhanced thrust generation, and (2) symmetrically arranged pectoral fins capable of two-degree-of-freedom motion (rowing and feathering) to ...
W. Liu, Y. Du, W. Hu, N. Li, L. Cui, Z. Zhang, C. Sun   +6 more
doaj   +1 more source

Adaptive navigation control of a bionic robotic fish in complex Karman vortex street flow fields using an LSTM-DDPG hybrid strategy

Scientific Reports
Bionic robotic fish suffer from poor navigation robustness, high energy consumption, and control lag in unsteady Karman vortex street flow fields. This study proposes a hybrid adaptive navigation strategy combining long short-term memory (LSTM) and deep ...
Changhui Zheng, Peigang Jiao, Honghao Xu, Yiheng Zhang, Jiaxin Shi   +4 more
doaj   +1 more source

Trajectory tracking control of robotic fish in offshore disturbance environments via disturbance observer-based inverse sliding mode

Frontiers in Marine Science
Considering the complex offshore environment, where small robotic fish are exposed to surface disturbances from wave forces, suspended particles, and model uncertainties, as well as deep-water disturbances from bottom currents, this paper proposes an ...
Juntao Sun, Yanjun Liu, Yanjun Liu, Fagang Bai, Xianglei Yan, Enzhi Quan, Gang Xue, Gang Xue   +7 more
doaj   +1 more source

A Numerical Analytical Method of Parameter Optimization for Fast-starting of the Bionic Robot Fish

International Journal of Online and Biomedical Engineering (iJOE), 2013
In this study,the alloy sheet, the giant magnetost- rictive material (GMM), was stuck on the sheet, and the external magnetic field were simulated as the framework of the fishtail, respectively; the muscle of the fish and the nerve are to control the swing of the fishtail for simulating the fast-starting of some natural fishes.
openaire   +2 more sources

Hydrodynamic experiment on influence of span-wise stiffness of flexible pectoral fin

Zhongguo Jianchuan Yanjiu
ObjectivesThis paper investigates the influence of the span-wise stiffness of a flapping pectoral fin on its generated thrust. MethodsA scheme to fabricate a flexible pectoral fin with uniform span-wise stiffness is introduced. A series of experiments is
Songzi GUO, Zhiyin LI
doaj   +1 more source

Development of a Robotic Flying Fish With Cross‐Medium Capability

Many fish species are capable of leaping out of water, and several robotic fish have been developed to mimic this behavior. However, enhancing jumping performance and achieving low‐altitude gliding—as seen in flying fish—remain challenging.
Haozhi Chen, Mengxing Huang, Kexian Liu, Shihao Ran, Zhong Huang, Chuansheng Du, Jiangjiang Chen, Xianwu Zeng   +7 more
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Morphing median fin enhances untethered bionic robotic tuna\u27s linear acceleration and turning maneuverability [PDF]

Median fins of fish-like swimmers play a crucial role in linear acceleration and maneuvering processes. However, few research focused on untethered robotic fish experiments.
Huang, Hongbin, Lin, Zhonglu, Zheng, Wei, Zhang, Yu, Zhou, Wei, Liu, Zhibin, Zhang, Jinhu   +6 more
core   +1 more source

Bionic Technology—Robotic Exoskeletons and Prostheses

Bionic technology and wearable robotics are transforming the landscape of assistive devices, offering new possibilities for rehabilitation and mobility enhancement.

core   +1 more source

Propulsion Control of Bionic Robotic Fish Based on Deep Deterministic Policy Gradient Algorithm

IEEE Open Journal of the Industrial Electronics Society
Robotic fish exhibit considerable potential for a wide range of applications. However, the limitation of battery size highlights the need to improve swimming efficiency.
Dong Xu, Heyang Feng, Fan Qiao, Kaiyang Lu, Xiaoguang Hu, Yupeng Liu   +5 more
doaj   +1 more source