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SAE Automotive Technical Papers, WONLYAUTO 2024

作者： Huang, Bin Yang, Nuorong Ma, Liutao Wei, Lexia Liuzhou Wuling New Energy Automobile Co. Ltd. China Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components China

With the modernization of agriculture, the application of unmanned agricultural special vehicles is becoming increasingly widespread, which helps to improve agricultural production efficiency and reduce labor. Vehicle path-tracking control is an important link in achieving intelligent driving of vehicles. This paper designs a controller that combines path tracking with vehicle lateral stability for four-wheel steer/drive agricultural special electric vehicles. First, based on a simplified three-degrees-of-freedom vehicle dynamics model, a model predictive control (MPC) controller is used to calculate the front and rear axle angles. Then, according to the Ackermann steering principle, the four-wheel independent angles are calculated using the front and rear axle angles to achieve tracking of the target trajectory. For vehicle lateral stability, the sliding mode control (SMC) is used to calculate the required direct yaw moment control (DYC) of the vehicle, and wheel torque distribution is carried out considering the front and rear axle loads and road adhesion coefficient. CarSim and MATLAB/Simulink were chosen to build a joint simulation platform, and simulation experiments were conducted under two working conditions: high adhesion road surface and low adhesion road surface. The simulation results showed that the controller designed in this paper can improve the lateral stability of the vehicle while ensuring good path-tracking accuracy. © 2024 SAE International. All rights reserved.

关键词： Adhesion

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Evaluation of microstructure variation of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy manufactured by laser melting deposition after electroshocking treatment 9

Evaluation of microstructure variation of Ti-6.5Al-3.5Mo-1.5...

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9th International Conference on Energy Materials and Electrical Engineering, ICEMEE 2023

作者： Sun, Xuan Liu, Bingliang Wen, Yan Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

ISBN: (纸本)9781510672765

Electroshocking treatment (EST) was a method to optimize the microstructure of titanium alloy. Under EST, the dense basket-weave structure in Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) manufactured by laser melting deposition became sparse, and colony tissue nucleation grows near grain boundaries. The phase transformation induced by EST results in changes in the intensity and orientation of α and β textures in TC11, but α/β still obeyed the Burger orientation relationship, and the β phase content increased. At the same time, EST also promoted the dislocation movement near the grain boundary, and a mass of dislocation accumulation at the grain boundary increased the KAM value at the grain boundary. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Electroshocking treatment (EST) Laser melting deposition (LMD) Microstructure Texture Titanium alloy

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Performance and mechanism analysis of EMA-GMA modified PMMA/ASA alloy 8

Performance and mechanism analysis of EMA-GMA modified PMMA/...

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2024 8th International Conference on Energy technology and Materials Science, ICETMS 2024

作者： Gu, Zhaohui Wang, Hui Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

This article examines the impact of the EMA-GMA combination on the mechanical characteristics, fluidity, and glass transition temperature of PMMA/ASA alloy and uses scanning electron microscopy to characterize the modified PMMA/ASA alloy. The findings indicate that the addition of 5% EMA-GMA to PMMA/ASA significantly enhances its fracture resistance without compromising its stiffness. When the additional amount of EMA-GMA exceeds 10%, the mechanical properties and fluidity of the alloy begin to decline significantly. EMA-GMA within 15% can promote PMMA/ASA compatibility. © Published under licence by IOP Publishing Ltd.

关键词： Fluidity

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Fuzzy PID Control of Parallel 6-DOF Motion Platform 5

Fuzzy PID Control of Parallel 6-DOF Motion Platform

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5th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2023

作者： Liu, Jiyuan Yu, Houyu Wang, Xujie Wuhan Unive-rsity of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan China

ISBN: (纸本)9798350336030

In order to solve the control problem of the parallel 6-DOF motion platform, a fuzzy controller is designed to self-tune the PID control parameters, and a fuzzy PID controller is formed to control the actuator electric cylinder. SimMechanics/Simulink are used to establish the simulation model of the parallel 6-DOF motion platform, and the traditional PID control and fuzzy PID control are used to its control respectively, and the comparison is made. The research shows that the parameter self-tuning fuzzy PID control method has good control accuracy and response speed. © 2023 IEEE.

关键词： Fuzzy control

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A study on the variation of mechanical properties of Ti-8Al-1Mo-1V titanium alloy after electro-shocking treatment 10

A study on the variation of mechanical properties of Ti-8Al-...

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2023 10th International Conference on advanced Manufacturing technology and Materials Engineering, AMTME 2023

作者： Yao, Yupeng Zhou, Jian Zhao, Hongjie Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

The electro-shocking treatment (EST) was a rising method for the strengthening of titanium alloys. This work conducted EST on Ti-8Al-1Mo-1V titanium alloy specimens with the purpose to shed insights on the influence of EST on the properties of the alloy. The results indicated that the number of the pulse current increased, the properties of the Ti-8Al-1Mo-1V titanium alloy were notably improved, and the fracture mode varied from ductile fracture to a mixed fracture mode of brittle and ductile. © Published under licence by IOP Publishing Ltd.

关键词： Titanium alloys

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Research on microstructure variation of laser melting deposition Ti-6Al-4V under electroshocking treatment 10

Research on microstructure variation of laser melting deposi...

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2023 10th International Conference on advanced Manufacturing technology and Materials Engineering, AMTME 2023

作者： Bi, Jian Sun, Hongxin Wen, Yan Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China

In this work, electroshocking treatment (EST) was applied to Ti-6Al-4V prepared by laser melting deposition (LMD), and the microstructure and grain size were investigated. The size of the α phase was reduced, and the... 详细信息

关键词： Deposition

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Hot deformation behavior and constitutive modeling of Q345E alloy steel under hot compression

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Journal of Central South University 2017年第2期24卷 284-295页

作者：钱东升彭亚亚邓加东 School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan 430070 China State Key Laboratory of Materials Processing and Die & Mould Technology Wuhan 430070 China

Q345E as one of typical low alloy steels is widely used in manufacturing basic components in many fields because of its eminent formability under elevated temperature. In this work, the deformation behavior of Q345E steel was investigated by hot compression experiments on Gleeble-3500 thermo-mechanical simulator with the temperature ranging from 850 ℃ to 1150 ℃ and strain rate ranging from 0.01 s-1 to 10 s-1. The experimental results indicate that dynamic softening of Q345E benefits from increasing deformation temperature and decreasing strain rate. The mathematical relationship between dynamic softening degree and deformation conditions is established to predict the dynamic softening degree quantitatively, which is further proved by some optical microstructures of Q345E. In addition, the experimental results also reveal that the stress level decreases with increasing deformation temperature and decreasing strain rate. The constitutive equation for flow stress of Q345E is formulated by Arrihenius equation and the modified Zener-Hollomon parameter considering the compensation of both strain and strain rate. The flow stress values predicted by the constitutive equation agree well with the experimental values, realizing the accurate prediction of the flow stress of Q345E steel under hot deformation.

关键词： hot deformation behavior dynamic softening flow stress constitutive model

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Accurate simulation on the forming and failure processes of fiber metal laminates: A review

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International Journal of Lightweight Materials and Manufacture 2023年第3期6卷 344-356页

作者： Chen, Yizhe Yang, Yusen Wang, Zhuoqun Wang, Hui Li, Jun Hua, Lin Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China Jiangsu Xinyang New Material Co. Ltd. Yangzhou225000 China

Fiber metal laminates (FMLs) are a kind of composite material prepared by alternately arranging fiber layers and metal sheets at a certain temperature and pressure. It has been widely used in aerospace and automobile transportation for its excellent combined mechanical properties. For the forming and failure processes of FMLs, the interfacial behavior and damage evolution of components are hard to be observed experimentally. Therefore, it is of great importance to simulate them accurately. In this article, the development and application of FMLs were first introduced. Then the comparison of constitutive models in FMLs simulation was given, especially the dynamic constitutive model applied to the metal layer. After that, the important aspects of damage evolution, interface behavior, and model optimization in the simulation on the forming and failure process of FMLs were analyzed, and the emphasis is on the nonlinear progressive damage model of different materials, the construction of cohesive zone model and superior meshing methods. Furthermore, the experimental verifications of FMLs simulation were given. It is shown that the deformation behavior and damage characteristics of various kinds of FMLs during forming and failure processing can be accurately predicted by reasonable numerical simulation. Eventually, the future outlooks for numerical simulation of FMLs was proposed. Through this review, scholars and engineers who are interested in FMLs can systematically understand the numerical simulation work of FMLs, which is helpful in improving the quality of research in this field. © 2023 The Authors

关键词： Constitutive models

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Numerical simulation on dendritic growth of Al-Cu alloy under convection based on the cellular automaton lattice Boltzmann method

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Chinese Physics B 2022年第9期31卷 575-586页

作者： Kang-Wei Wang Meng-Wu Wu Bing-Hui Tian Shou-Mei Xiong School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

A numerical model is developed by coupling the cellular automaton(CA)method and the lattice Boltzmann method(LBM)to simulate the dendritic growth of Al-Cu alloy in both two and three *** improved decentered square algorithm is proposed to overcome the artificial anisotropy induced by the CA cells and to realize simulation of dendritic growth with arbitrary *** on the established CA-LBM model,effects of forced convection and gravity-driven natural convection on dendritic growth are *** simulation results show that the blocking effect of dendrites on melt flow is advanced with a larger number of *** competitive growth of the converging columnar dendrites is determined by the interaction between heat flow and forced ***-driven natural convection leads to highly asymmetric growth of equiaxed *** sinking downwards of the heavy solute,chimney-like or mushroom-like solute plumes are formed in the melt in front of the columnar dendrites when they grow along the gravitational *** details on dendritic growth of Al-Cu alloy under convection are revealed by 3D simulations.

关键词： simulation cellular automaton dendritic growth melt convection

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Multifunctional additives for the enhanced performance of the doctor-blading printed perovskite solar modules

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Journal of Energy Chemistry 2025年

作者： Linyong Tian Haoyu Cai Zhenyue Wang Yongjun Liu Juan Zhao Guodong Liu Yaqi Cheng Biqi He Hongfei Zhang Long Jiang Bofei Xue Yi-Bing Cheng Jie Zhong State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China Nanjing Aolian Light Energy Technology Co. Ltd. Nanjing 320115 Jiangsu China School of Automobile Engineering Wuhan University of Technology Wuhan 430070 Hubei China State Key Laboratory of Oil and Gas Equipment CNPC Tubular Goods Research Institute Xi’an 710077 Shaanxi China Shaanxi Provincial Key Laboratory of Clean Energy Equipment and Materials Xi’an 710077 Shaanxi China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528216 Guangdong China

The utilization of self-assembled monolayers (SAMs) has significantly elevated the power conversion efficiency (PCE) of inverted perovskite solar cells (PSCs). However, the inherent hydrophobicity of these SAMs poses challenges in the subsequent printing of perovskite films in PSC upscaling. In this work, we incorporated a multifunctional additive, dimethyl suberimidate dihydrochloride (DMSCl 2 ), into the perovskite precursor to enhance the quality of the blade-coated perovskite film on the SAM interlayer. Characterizations revealed that the function groups of the imino (N–H) and methoxy (CH 3 O–) DMSCl 2 facilitate both bonding between perovskite precursor and SAM molecule (Me-4PACz), which facilitates the large-area printing of perovskite film. These interactions also provide effective passivation within the perovskite films and interface defects of PSCs. As a result, a significantly enhanced PCE from 16.62% to 20.37% was obtained for the printed perovskite solar module (93.10 cm 2 ) and 25.27% for the small device (0.09 cm 2 ). Remarkable stability was achieved with 93.3% of their initial PCE after 1000 h of continuous maximum power point (MPP) tracking. This report suggests that multifunctional additive doping provides a convenient route for the upscaling of perovskite solar cells with SAM interlayers.

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