This study proposes an innovative curvilinear cylindrical gear drive characterized by a predesigned fourth-order transmission error and a cosine tooth profile. The predesigned fourth-order transmission error not only absorbs linear transmission errors but also contributes to a smoother overall motion curve. The cosine tooth profile helps reduce the minimum number of teeth without undercutting. This research begins by establishing the generation methods and mathematical models f...

This study examined the greenhouse gas (GHG) emission characteristics of surface treatment, lightweight metal processing, and mold manufacturing industries in Taiwan's metal and electrical machinery manufacturing sectors. Carbon inventory analysis of 22 enterprises revealed that Scope 2 (indirect) emissions accounted for an average of 67.99% of total emissions, while CO2, CH4, and HFCs were the main Scope 1 (direct) emissions. Fugitive emissions dominated the lightweight metal ...

To develop a fault detecting model for moni￾toring the health of a drive shaft during operation of trains on Taipei’s Wenhu train line, this study devel￾oped a train drive shaft fault detection method by using principal component analysis (PCA). First, numerous features were extracted from drive shaft vibration signals collected during train operation. Redundant features were removed through feature ranking, and PCA was used to reduce the features’ dimensionality. The model was ult...

The control of common rail pressure influences the power, economy, and exhausted emission of the engine in the High Pressure Common Rail Injection System (HPCRIS), in which the fluctuation amplitude of steady state and the transient tracking speed are important indexes of controller’s performance. To improve the performance of the controller, a HPCRIS control module is firstly developed based on the physical model, including rail pressure control state machine, demand flow calc...

To optimize computing resources and reduce labor costs associated with finite element analysis in the traditional anti-collision beam design process, constructing a vehicle collision surrogate model has emerged as an efficient and feasible method for predicting collision performance. In order to enhance the prediction accuracy of the surrogate model, a model selection strategy based on mutual information theory and the random forest algorithm for the stacking algorithm is propo...

In this study, the microstructure evolution of TA15 titanium alloy and its effect on the material properties were investigated by laser quenching and traditional heat treatment. Through the systematic evaluation of three different heat treatment processes, it is revealed that heat treatment has significant effects on the microstructure, element distribution, microhardness and tensile properties of the alloy. The results show that the 780°C quenching treatment does not improve t...

The cotton-picking robot, a vital tool in modern agriculture, requires meticulous planning of its manipulator's operational path to optimize harvesting costs, quality, and efficiency. Addressing the issues of operational efficiency, vibration, and impact generated during the movement of the mechanical arm for long￾staple cotton picking, this study introduces a time￾optimal trajectory planning strategy. Analyzing the picking path, this article employ an S-shaped curve for speed cont...

As the primary moving part of a wind turbine, the gearbox has a high failure rate and is particularly detrimental to the device. The diagnosis of early gearbox problem signals is less effective using the typical vibration detection techniques now in use. Considering this, Based on the KPCA-VMD approach, this research offers a wind turbine gearbox early fault monitoring and multidimensional feature assessment method for analyzing wind turbine gearbox inconspicuous early failure ...

This study introduces a method to predict the responsiveness performance and optimize the control parameters of joint modules. An integrated joint module was created to assess overshoot and response time under various operating conditions and control parameter values. The results reveal nonlinear impact of conditions and parameters on the responsiveness performance, indicating a complex multifactorial issue. An MA-BPNN model was then established by merging the BPNN model with t...

The body structure of electric bus is mainly welded by small section rectangular steel pipe, with strong bearing capacity. It has obvious advantages in structural safety, structural stability, riding comfort and other aspects, and is currently widely used in electric buses. This article takes the body framework of an electric bus as the research object, and based on the characteristics of body structure design, uses software such as SolidWorks and ANSYS Workbench to establish a...