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Study on Side Collision of Battery Boxes Based on HyperWorks

Journal of Physics: Conference Series 2021年第1期2137卷

作者： Weigao Qiao Zhanxi Zhang Dong Lu Lei Yu School of Automotive Engineering Wuhan University of Technology Wuhan Hubei 430070 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan Hubei 430070 China

To effectively improve the safety of battery boxes in side collision of electric vehicles, two measures are proposed: Firstly spread the boss evenly around the battery box. Secondly the upper and lower parts of the battery box are matched with the convex heads and groove structure. The finite element models of the battery boxes before and after the optimization, the vehicle and the movable barrier are established in this paper. According to the collision regulations, the side collision simulation of the vehicle body is carried out. The changes of the stress, deformation and lateral acceleration of the battery boxes are analyzed. The effectiveness of the measures is verified. The extrusion models of the battery boxes are established. The deformation and the changes of the internal energy of the battery boxes are analyzed. The effectiveness of the measures is verified again.

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Mechanical behaviors and energy absorption properties of Y/Cr and Ce/Cr coated open-cell nickel-based alloy foams

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Rare Metals 2018年第8期37卷 650-661页

作者： Zhi-Li Hu Qiu Pang Guo-Qiang Ji Gao-Hui Wu State Key Laboratory of Advanced Welding and Joining HarbinInstitute of TechnologyHarbin 150001China Hubei Key Laboratory of Advanced Technology of Automobile Components Wuhan University of TechnologyWuhan 430070China School of Mechanical and Electrical Engineering Wuhan Donghu UniversityWuhan 430212China Materials Test Department China National Analytical CenterGuangzhou 510070China

In this study, Y-and Ce-modified Cr coatings applied by pack cementation method were prepared on the surface of open-cell nickel-based alloy foam. The morphologies and microstructures of Y- and Ce-modified Cr coatings with various Y and Ce contents were investigated in detail. Then, the effects of Y and Ce addition on the mechanical properties of open-cell nickel-based alloy foams were analyzed and compared. Simultaneously, the energy absorption capacity and energy absorption efficiency of the Y- and Ce-modified Cr coated alloy foams were discussed and compared at the room and high temperatures. The results show that Cr coatings containing minor amounts of rare earth element （Y and Ce） are well adhered to the nickel-based foam struts. Especially, the microstructure of the 2 wt% Ce-modified Cr coating is denser and uniform. In addition, the compressive strength and plateau stress of Y- and Ce-modified Cr coated alloy foams firstly increase and then decrease by increasing the Y and Ce contents at room and high temperatures. The energy absorption capacity of Y/Cr and Ce/Cr coated alloy foams increases linearly with the strains increasing. The Ce/Cr coated alloy foams can absorb more energy than Y/Cr coated alloy foams in the plateau and densification regions at room temperature. Compared to those at room temperature, the Y- and Ce-modified Cr coated alloy foams show higher energy absorption efficiency when deforma- tion within 10%-30% at high temperature.

关键词： Open-cell nickel-based alloy foam Y-modified Cr coating Ce-modified Cr coating Pack cementation Mechanical properties

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Effects of process parameters on morphology and distribution of externally solidified crystals in microstructure of magnesium alloy die castings

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China Foundry 2018年第2期15卷 139-144页

作者： Meng-wu Wu Xiao-bo Li Zhi-peng Guo Shou-mei Xiong Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology School of Materials Science and Engineering Tsinghua University

During the cold-chamber high pressure die casting(HPDC) process, samples were produced to investigate the microstructure characteristics of AM60B magnesium alloy. Special attention was paid to the effects of process parameters on the morphology and distribution of externally solidified crystals(ESCs) in the microstructure of magnesium alloy die castings, such as slow shot phase plunger velocity, delay time of pouring and fast shot phase plunger velocity. On the basis of metallographic observation and quantitative statistics, it is concluded that a lower slow shot phase plunger velocity and a longer delay time of pouring both lead to an increment of the size and percentage of the ESCs, due to the fact that a longer holding time of the melt in the shot sleeve will cause a more severe loss of the superheat. The impingement of the melt flow on the ESCs is more intensive with a higher fast shot phase plunger velocity, in such case the ESCs reveal a more granular and roundish morphology and are dispersed throughout the cross section of the castings. Based on analysis of the filling and solidification processes of the melt during the HPDC process, reasonable explanations were proposed in terms of the nucleation, growth, remelting and fragmentation of the ESCs to interpret the effects of process parameters on the morphology and distribution of the ESCs in the microstructure of magnesium alloy die castings.

关键词： magnesium alloy high pressure die casting microstructure externally solidified crystals process parameters

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Simplified Method of Simulating Double-Layer Micro-Perforated Panel Structure

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Automotive Innovation 2018年第4期1卷 374-380页

作者： Wan Chen Chihua Lu Zhien Liu Songze Du Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

The micro-perforated panel(MPP)structure has been widely used in various noise control applications,and thus its acoustic performance prediction has been receiving increasing *** acoustic performance of simple MPP structures,such as a MPPsound absorber,has been predicted using an analytical calculation ***,this is not a suitable approach toward predicting the acoustic performance of complicated MPP structures,owing to the structural complexity of these ***,the many perforations of submillimeter scale diameter render the MPP structures very difficult to analyze using numerical ***,this study focused on two different simplified MPP simulation methods:the transfer admittance method and the equivalent fluid method,and their application on double-layer MPP *** on the two simplified MPP simulation methods,the transmission loss value of the double-layer MPP mufflers with two sets of different structural parameters was calculated,*** predicted results were compared with the impedance tube *** results revealed that the two simplified MPP simulation methods could effectively predict the acoustic performance of doublelayer MPP ***,the prediction based on the transfer admittance method can outperform the two simplified simulation methods.

关键词： Double-layer MPP structure Acoustic simulation Transfer admittance Porous material Experimental test

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Identification and recovery path planning of Marine garbage patch based on Machine vision

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Journal of Physics: Conference Series 2021年第1期1907卷

作者： Wenbin Zhang Sheng Zhao Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China. Wuhan University of Technology Wuhan China.

At present, the environmental problems in the water are becoming more and more prominent, and many teams are working on the research of the automation of garbage collection at sea. In order to a ready-made sea on the garbage recycling equipment automation, intelligent recognition for all white plastic and in identifying regional planning the path of the recycling of recycling equipment, aiming at different times during the day under the sea lighting situation, puts forward a visual processing and multi-step sea boundary identification method. After the image is processed by using two peak method normalized Canny boundary scan and other methods, the vertical and horizontal scanning and boundary recognition are carried out to obtain the closed Marine garbage main body area. Finally, Zigzag algorithm is used to carry out recovery path planning in the scanned area, and the results under different search radii are compared and analysed. The experimental results show that this method is applicable to a wide range of applications and has high accuracy and practicability, and the recognition results are satisfactory.

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Research on Vehicle Damping Control Strategy Based on In-Arm Torsional Electromagnetic Active Suspension

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Journal of Physics: Conference Series 2021年第2期1865卷

作者： Hongyang Zhang Weier Xiang Kailai Zhou Lin Xu School of Wuhan University of Technology Wuhan China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China

This paper proposes a new control strategy based on the In-Arm Torsional Electromagnetic Active Suspension (ITEAS), which can improve the vehicle ride comfort through adjusting the damper in ITEAS to optimize the kinetic characteristics of the vehicle composed by two ITEAS systems. Firstly, the structure and principle of the new type system is introduced followed by the description of the vehicle and the damper in ITEAS. Secondly, according to theoretical mechanics and fluid mechanics, the dynamic model of ITEAS system and the hydraulic model of shock absorber are established under forced vibration. Then, the PID control simulation model of the front suspension is established in AMESIM with a passive model as reference, due to the special assemble features of the vehicle. The rear suspension adopts predictive control method and the simulation model is built in MATLAB/SIMULINK, whose theory can be summarized as adjusting the duty ratio of the valve in damper to improve the stability of the vehicle under the condition that the road surface information is already known. Lastly, this paper tests the suspension characteristics on the MTS bench, which verifies the proposed control method improves the ride comfort performance and the feasibility of predictive system.

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The Effects of Parameter Variations on the Torque Control of Induction Motor

The Effects of Parameter Variations on the Torque Control of...

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Conference on Vehicle Control and Intelligence (CVCI)

作者： Feixiang Zhao Jianwei Zhang Dongmei Wu Guoqing Liu Wensong Lang Pinglai Wang Automotive Research Institute China National Heavy Duty Truck Group Co.ltd. Jinan China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan China

ISBN: (数字)9781728184975

ISBN: (纸本)9781728184982

By analyzing the principle and method of the direct vector control torque control method for induction motor, an analysis method of the influence of motor parameter changes on the accuracy of motor electromagnetic torque control under steady-state conditions is proposed, and the application of four common flux observations is derived. In direct vector control, the error function of the electromagnetic torque is estimated. The influence of the change of induction motor parameters on the torque control accuracy is theoretically analyzed, and the simulation is verified by Simulink. The simulation proves that the method can correctly analyze the torque control accuracy under the condition of induction motor vector control without complicated calculations.

关键词： Resistance Inductance Torque Induction motors Torque control Stators Observers

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Study on the characterization of La0.7Sr0.3CoO3-δ perovskite catalyst and its catalytic performance for carbon black oxidation

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Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and technology 2020年第6期48卷 735-740页

作者： Fang, Le Yu, Jing Guo, Guan-Lun Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan430070 China

In order to study the catalytic oxidation process of carbon black over La0.7Sr0.3CoO3-δ perovskite catalyst, two different contact modes of the catalyst and carbon black were designed, namely intimate contact and loose contact, and used to observe the reaction behavior. The results showed that the tig (light-off temperature) of carbon black decreased by 89.5 and 157.4℃ under intimate contact conditions compared with the loose contact and no catalyst contact conditions. Meanwhile, as the ratio of catalyst/carbon black increased, the tig, tm (maximum conversion temperature) and tf (burn-up temperature) of the carbon black all shifted to the low temperature, indicating that the catalyst had good catalytic performance for carbon black oxidation. © 2020, Science Press. All right reserved.

关键词： Perovskite

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Fault Diagnosis of Tractor Start System Based on Structural Analysis Method

Fault Diagnosis of Tractor Start System Based on Structural ...

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作者： Chang-qing DU Huan ZHANG Yi-duo ZHU Hubei Key Laboratory of Advanced Technology for Automotive Components(Wuhan University of Technology) Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan Technical College of Communications

In order to achieve accurate positioning of the electrical failure of the tractor starting system,this paper designs a fault diagnosis system based on structural ***,through the analysis of the traction battery and the starting motor,this paper selects four key faults:battery resistance fault,motor armature resistance fault,motor armature fault and motor joint fault,and establishes the electrical fault model of the tractor starting ***,this paper divides the variables in the fault model into known variables,unknown variables and fault *** the MATLAB dmperm command is used to analyze the observability and isolation of the unknown *** find that we can detecte and isolate four faults by adding a voltage sensor based on the original engine speed *** select three equation sets as the test set in all the structural minimum set of over-determined equations(MSO sets),and design the residual value of each test set as the observer of the *** faults detected by different observers are different,but 3 observers can detect 4 ***,we design the diagnostic strategy of the system:we select [-1,1] as the feasible domain of the *** the value of the observer exceeds the feasible domain,the fault characteristic parameter is 1,otherwise it is *** fault feature vector is composed of three fault characteristic parameters and used as system fault *** order to verify the correctness of the diagnostic system design,we use MATLAB to build the system simulation platform,which generated 4 faults in 3 s-4 s,6 s-7 s,9 s-10 s,12 s-13 s *** simulation results show that the results of the three observers are in line with the *** is determined that the fault feature vector can accurately locate the critical *** also shows the advantage of structural analysis for the electrical fault diagnosis of tractor starting systems,which can accurately locate system faults with only a small numb

关键词： Tractor Fault diagnosis Structural analysis method Detection Isolation

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A pre-warning system of abnormal energy consumption in lead smelting based on LSSVR-RP-CI

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Journal of Central South University 2019年第8期26卷 2175-2184页

作者： WANG Hong-cai FANG Hong-ru MENG Lei XU Feng-xiang School of Energy Science and Engineering Central South University Changsha 410083 China School of Automation Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology of Automotive Components Wuhan University of Technology Wuhan 430070 China

The pre-warning of abnormal energy consumption is important for energy conservation of industrial engineering. However, related studies on the lead smelting industries which usually have a huge energy consumption are rarely reported. Therefore, a pre-warning system was established in this study based on the intelligent prediction of energy consumption and the identification of abnormal energy consumption. A least square support vector regression (LSSVR) model optimized by the adaptive genetic algorithm was developed to predict the energy consumption in the process of lead smelting. A recurrence plots (RP) analysis and a confidence intervals (CI) analysis were conducted to quantitatively confirm the stationary degree of energy consumption and the normal range of energy consumption, respectively, to realize the identification of abnormal energy consumption. It is found the prediction accuracy of LSSVR model can exceed 90% based on the comparison between the actual and predicted data. The energy consumption is considered to be non-stationary if the correlation coefficient between the time series of periodicity and energy consumption is larger than that between the time series of periodicity and Lorenz. Additionally, the lower limit and upper limit of normal energy consumption are obtained.

关键词： lead smelting energy consumption least square support vector regression (LSSVR) recurrence plots (RP) confidence intervals (CI)

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