Comprehensive research on the wireless power transfer technology of autonomous underwater vehicles is necessary to address issue significant energy loss in such during transfer. Previous analysis factors that affect seawater environment demonstrated eddy current generated transmission and offset coupling mechanism are main degrade efficiency. In this study, existing literature for recent years reviewed, it concluded can be effectively reduced through optimization, adaptive control, docking...

Air-stable triangular dodecahedral Dy( iii ) single-ion magnets with pseudo-mono-axial linear ligand fields exhibit high energy barrier exceeding 600 K, which represent the highest for mononuclear SMMs dodecahedron.

Summary The existing wireless power transfer systems for autonomous underwater vehicles (AUVs) have problems due to long transmission distances and the unstable attitudes of AUVs, which result in poor system performance. To solve this problem, paper proposes a lightweight universal variable ring‐shaped magnetic coupler shape characteristics AUVs charging platform environment. In particular, size transmitter can be varied according AUV, resulting close fit between receiver, reducing distance...

During harvesting, the thresher of combine harvester produces unbalanced vibrations due to problems such as stalk winding and these can greatly affect stability service life device. Finite element modal analysis vibration tests threshing cylinder frame were carried out. Based on simulation experimental data, four kinds prestressed support beams designed suppress dynamic characteristics during operation. To verify suppression effect, a test was out with installed thresher. The results showed...

The mass of a magnetic coupler increases with the output its wireless power transfer system, limiting broader application this technology. It is imperative to solve trade-off between and mass. Here, we present high-power-density system designed for autonomous underwater vehicles (AUVs) based on variable ring-shaped coupler. A lightweight design achieved through topology structure, parameters are optimized analyzed. Our can eliminate gap AUV platform when charging fix posture improve...

The classical Cuk, Sepic, and Zeta converters have found wide applications in various fields. However, there has been limited research exploring their relationships. This letter aims to uncover relationships by focusing on capacitor-less circuits (CLCs). Initially, it is observed that these three exhibit highly similar performance characteristics, such as equal voltage gains average component currents. Subsequently, this establishes equivalent CLCs are the reason behind similarities,...

Nanocrystalline magnetic cores have been applied in inductive power transfer (IPT) systems as novel materials for their high saturation capability and flexible application. However, the loss of eddy current is still a primary concern nanocrystalline material. This letter investigates two crushing patterns, namely square-crushing dot-crushing, flake ribbon (NFR) to mitigate IPT applications. In experiment, 1 kW prototype with curved coupler autonomous underwater vehicles (AUVs) built verify...

This article deals with an experimental investigation of coinstantaneous heat and mass transfer phenomena between water air in a counterflow wet cooling tower filled new type packing named “FCP-08.” The consisted foamed ceramic corrugated board sine waves, surface retention groove is 1.0 m high, it has cross-sectional test area 0.68 × m. focused mainly on the effect water–air flow ratio characteristics tower, for different inlet temperatures. results show that range, [Formula: see text],...

For improving the intersection traffic capacity and reducing vehicle emission, solution that aim at multi-object optimization was presented by using genetic algorithm (GA), urban microscopic simulation model (UTMSM) combined with GA developed. The performed result indicated method in this paper effective to get better signal control effects improve environment.

Leaf fragments and grain mixture produced by rice threshing with a combine harvester seriously affects the subsequent cleaning efficiency. In this paper, leaf breaking force was tested at different temperatures moisture contents to analyze influence of temperature on tensile properties leaves. The overlapping regions separation were obtained. Based force, effect change content analyzed. results showed that strength decreased first, then increased finally from sheath top. about 75 N (N is...

For more accurately predicting and evaluating the vehicle emission at complicated traffic condition, paper set up an urban microscopic simulation model. Base on model one typical intersection in Wuhan city was simulated analyzed paper. Furthermore, simulating instantaneous driving behavior during peak hour were obtained. Compared data with field about bus behavior, results showed that could preferable reflect real behavior. At same time interface developed to couple IVE (international...

In this study, a new multi-motor synchronous based on adjacent coupling error and sliding mode theory is designed, the tracking synchronization convergence which are proved very well by Lyapunoy LaSalle's Invariance Principle, Simulation results of synchronized system shows that controller can effectively achieve with quick rate good robustness.

In this study, Wuhai in Inner Mongolia and Lingwu Ningxia the eastern part of northwest arid desert region were used as study area, six types soil profiles selected on artificial green areas to their salinization characteristics, namely, homogeneous sandy (A), loamy (B), upper sand lower loam (C), (D), sandwich type (E) (loam-sand-loam (E1), loam-powder-loam (E2), sand-loam-sand-loam (E3)), stone (F). addition, effects irrigation, physical, depth factors investigated using redundancy...

In order to fight for good farming time or harvest in bad weather, combine harvester will produce more broken leaves when threshing high moisture content rice, which seriously hinder the grain cleaning effect. this study, breaking behavior of rice under different microwave drying and power was studied. Firstly, based on appearance freshly undergoing drying, changing property content, weightlessness rate temperature rise were tested analyzed. Secondly, tensile force compared with naturally...

When the transformer is put into operation, reliable operation of protection affected by residual magnetism and magnetic bias. The traditional second harmonic differential difficult to distinguish inrush current fault under special angle closing certain value remanence, which results in not moving or refusing operate. This paper proposes an optimized support vector machine (SVM) magnetizing recognition model based on particle swarm algorithm (PSO), combines waveform itself perform feature...

This paper provides an analysis of the laminated magnetic core implemented in inductive power transfer (IPT) applications. Magnetic design IPT is vital as it directly impacts coupling coefficient, thermal performance, and efficiency. The has become increasingly popular for recent years. However, simulation highly conductive cores can be challenging to obtain accurate result because high anisotropic characteristics influence eddy current loss. discusses method based on toroidal loss...

Inductive power transfer (IPT) systems heavily rely on accurate values of mutual inductance for efficient and optimal performance. This paper proposes a parameter estimation method series-series IPT (SS-IPT) with physics-informed neural network (PINN). Firstly, the physics model SS-IPT is established by deducing its ordinary differential equations. Then, merged into to establish PINN. With PINN, system identified using input current voltage transmitter-side only. The proposed PINN leverages...