In this study, a binocular stereo vision measure¬ment system with novel edge-enhancement feature algorithm is proposed for the electrode circular hole array position in electric vehicle battery modules. A simulated workpiece of the electrode circular hole array in an electric vehicle battery module has been created for testing. The proposed system combines image processing techniques with a novel edge-enhancement feature algorithm to identify the features of circular hole arrays in the workpiece...

The evolution of bicycle design has been driven by various user needs, influencing key aspects such as wheel size, handlebar length, and seat shape, all aimed at enhancing the rider's experience (Tomaszewski, 2021). Among these, the frame shape plays a crucial role in determining overall performance and comfort (Hsiao, 2015). Today, two predominant types of frames are in use: one-piece frames, commonly found in city bikes, racing bikes, and U-bikes, are designed for flat terrain or gentle slopes...

In response to the growing demand for sustainable and lightweight bicycle structures, this study investigates the application of natural fiber-reinforced composites in frame design. Sisal and jute fibers were selected as reinforcement materials, and their mechanical performance was evaluated through finite element simulations based on the ISO 4210-6 impact test standard. A composite stacking block consisting of four fiber orientations (0°, 30°, 60°, and 90°) was used to assess the minimum lamina...

This paper introduces a spindle imbalance detection method based on principal component analysis and a self-organizing map for machine tools under computer numerical control. By analyzing vibration signals collected during spindle operation, the method extracted eight key frequency-domain features, including spindle rotation and bearing characteristic frequencies. These features were refined through principal component analysis to eliminate collinearity while preserving essential information. A ...

This study investigates the transient variation of oxygen concentration in an oxygen-free oven using two numerical methodologies and experimental validation. A two-dimensional model, based on the finite element method, is developed to analyze velocity fields and oxygen concentration distributions, incorporating convection and diffusion effects. Additionally, a zero-dimensional model is introduced to simplify the prediction of oxygen concentration under convection-dominant conditions. The models ...

Numerous researchers have employed various shape descriptors in the dimensional synthesis of mechanisms. This study introduces a methodology for the path synthesis of spherical four-bar linkages utilizing Elliptical Fourier Descriptors (EFDs). EFDs, a Fourier-based shape representation method, allow the independent acquisition of Fourier coefficients through the Fourier expansion of individual components of the 3D coupler curve, rather than relying on a function as in traditional Fourier analysi...

To reveal heat transfer mechanism of metal hydride hydrogen storage reactor (MHHSR) efficiently and accurately. Meyer wavelet finite element model (MWFEM) is built integrating MWSF to conventional finite element model, which can effectively implement heat transfer analysis of MHHSR. Firstly, heat transfer models of MHHSR is established, which contains governing equations of metal hydride bed, governing equations of heat exchange fluid, and corresponding heat transfer boundary conditions. Secondl...

Sandwich structures have significant potential for application in the aerospace, automotive, shipping, and engineering industries due to their lightweight, high specific strength, and high specific stiffness. This study examines the bending characteristics of a hexag¬onal honeycomb sandwich beam made of aluminum alloy (6061-T6) material. In this work, we create some circular elements into the hexagonal honeycomb corners. We used the finite element method to conduct three-point bending test. The ...

Biodegradable particleboards made from agricultural waste are emerging as sustainable alternatives to conventional wood-based materials. This study developed high-performance particleboards using alkaline-treated corn husk fibers and chitosan adhesive, a natural alternative to formaldehyde-based resins. Alkaline pretreatment improved fiber wettability by removing lignin, hemicellulose, and impurities, enhancing fiber-adhesive interaction. Chemical modifications were analyzed using FTIR and XRD, ...

This study presents an uncertainty model predictive control (UM-MPC) algorithm that considers the uncertainties inherent in both environmental conditions and model parameters. Its core aim is to bolster the tracking accuracy and control system stability of autonomous vehicles. Establishing a multi-cellular model to mitigate the impact of uncertain parameters in the model. Based on the characteristic that drivers adjust their attention concentration according to road changes, a dynamic rule for t...

The phenomenon of liquid sloshing affects the performance of UAVs used in agricultural spraying. The multi-directional sloshing forces that occur inside the tank can cause the drone to deviate from the specified route and collide with an obstacle. In this study, multiple blade-shaped baffles were used to suppress liquid sloshing in a sprayer drone tank. Numerical simulations using standard k-ε, standard k-ω, SST k-ω turbulence models were performed to evaluate effectiveness of this sloshing supp...