Results 71 to 80 of about 11,432 (211)

Model predictive control‐based tracking controller for hybrid‐driven underwater legged robot

IET Control Theory &Applications, Volume 18, Issue 18, Page 2646-2659, December 2024.
To address the tracking problem of the hybrid‐driven underwater legged robot, we propose a control strategy that decomposed the whole tracking control system into body‐level and limb‐level subsystems. The body‐level subsystem used a central pattern generator‐based controller to plan suitable gait, and the limb‐level subsystem used a controller based on
Guangjie Zhang, Weisheng Yan, Rongxin Cui, Feiyu Ma   +3 more
wiley   +1 more source

Head Horn Enhances Hydrodynamic Perception in Eyeless Cavefish

Advanced Science, Volume 11, Issue 44, November 26, 2024.
Blind Chinese cavefish have evolved a unique head horn structure, which is a convergent feature in the eyesight‐reduced cavefish species. In this work, the structure‐function relationships of this specific head horn structure are systemically investigated, adequately revealing that it can enhance hydrodynamic perception and facilitate underwater ...
Zhiqiang Ma, Zheng Gong, Yonggang Jiang, Peng Wu, Changxin You, Zihao Dong, Hongchao Cao, Zhen Yang, Yahui Zhao, Huawei Chen, Deyuan Zhang   +10 more
wiley   +1 more source

Hybrid electromagnetic Halbach array for wireless power transfer (WPT) system using variable and uniform pitch coils

IET Power Electronics, Volume 17, Issue 15, Page 2206-2216, 25 November 2024.
This article seeks to improve the existing electromagnetic Halbach array wireless power transfer system by modifying the coil parameters such as the coil pitch for improved uniform magnetic field for optimum transfer efficiency and extending the transfer distance.
Tamuno‐omie Gogo, Dibin Zhu
wiley   +1 more source

UUV Cluster Distributed Navigation Fusion Positioning Method with Information Geometry

Journal of Marine Science and Engineering
The development and utilization of marine resources by humanity are increasing rapidly, and a single unmanned underwater vehicle (UUV) is insufficient to meet the demands of ocean exploitation.
Lingling Zhang, Shijiao Wu, Chengkai Tang, Hechen Lin   +3 more
doaj   +1 more source

Dual‐state and self‐oscillating wireless charging system topology for direct‐drive battery

IET Power Electronics, Volume 17, Issue 15, Page 2498-2514, 25 November 2024.
A novel topology with bi‐stable controlling for wireless charging system is proposed. The innovation of this method lies in treating the coupler as a current transformer, which enables more direct and simpler controlling of the charging current. The advantages of the proposal are that a desired charging current can be directly output from rectifier ...
Bo Li, Bao Zhang, Kai Xie
wiley   +1 more source

Development of a Cost-Effective UUV Localisation System Integrable with Aquaculture Infrastructure

Journal of Marine Science and Engineering
In many aquaculture farms, Unmanned Underwater Vehicles (UUVs) are being deployed to perform dangerous and time-consuming repetitive tasks (e.g., fish net-pen visual inspection) on behalf of or in collaboration with farm operators.
Thein Than Tun, Loulin Huang, Mark Anthony Preece   +2 more
doaj   +1 more source

Application of the level-set method to the implicit solvation of nonpolar molecules

, 2008
A level-set method is developed for numerically capturing the equilibrium solute-solvent interface that is defined by the recently proposed variational implicit solvent model (Dzubiella, Swanson, and McCammon, Phys. Rev. Lett. {\bf 104}, 527 (2006) and J.
Allen M. P., Angenent S. B., Bo Li, J. Andrew McCammon, Joachim Dzubiella, Kreyszig E., Li-Tien Cheng, Osher S., Sethian J. A.   +8 more
core   +1 more source

Reinforcement learning‐based finite‐time cross‐media tracking control for a cross‐media vehicle under unknown dynamics and disturbances

IET Control Theory &Applications, Volume 18, Issue 11, Page 1475-1490, July 2024.
A reinforcement learning framework is constructed to handle the unknown dynamics and environmental disturbances and achieve the optimal control performance. Combining the reinforcement learning technique, we develop the reinforcement learning‐based finite‐time control strategy without the singularity issue, which exhibits good robustness and provides ...
Shichong Wu, Lingli Xie, Jun Xian, Fei Liao, Wenhua Wu, Mingqing Lu, Xian Yi   +6 more
wiley   +1 more source

USV/UUV Cooperative Navigation Algorithm Based on Moving Long Baseline and Navigation Error Correction

水下无人系统学报
Unmanned undersea vehicles(UUVs) undergo a cumulative increase of inertial navigation error caused by long-term cooperative movement. In order to reduce the relative navigation errors between unmanned surface vessels(USVs) and UUVs and improve the ...
Huifeng JIAO, Chen YE, Wenchu WANG, Zhaoyong MAO, Yintao WANG   +4 more
doaj   +1 more source

Electrically driven octahedral rotations in SrTiO3 and PbTiO3

, 2012
We investigate the oxygen octahedral rotations that occur in two perovskites, SrTiO3 and PbTiO3, as a function of applied three-dimensional electric displacement field, allowing us to map out the phase diagram of rotations in both the paraelectric and ...
Hong, Jiawang, Vanderbilt, David
core   +1 more source