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Fang T.,Guangdong Provincial Key Laboratory of Automotive Engineering | Fang T.,South China University of Technology | Fengchong L.,Guangdong Provincial Key Laboratory of Automotive Engineering | Fengchong L.,South China University of Technology
Proceedings - 9th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2017 | Year: 2017

In the process of reconstruction of traffic accident, it is very necessary to have a analysis of human body's biomechanics simulation. Starting from the traffic case, the injury caused by the airbag to the human head is discovered. Establish the finite element model of airbag and use the human head model established by team to have a simulation and analyze. The simulation results are basically consistent with the real head injury, and verified the speed of the car and the degree of head injury. The important role of the human body biomechanics research in traffic accident reconstruction and its application are expounded. © 2017 IEEE.


Chen J.,South China University of Technology | Chen J.,Guangdong Provincial Key Laboratory of Automotive Engineering | Huang C.,South China University of Technology | Huang C.,Guangdong Provincial Key Laboratory of Automotive Engineering | And 5 more authors.
Qiche Gongcheng/Automotive Engineering | Year: 2013

Based on the requirements of regulation ECE R66, a finite element (FE) model for bus body section is built with its simulation accuracy verified by test, and the rollover process and structural deformation of bus are analyzed. On this basis a FE model for body section with occupants is then constructed to investigate the motion path, injury status and their evaluation of occupants at different positions with and without safety belt worn.


Tan D.,South China University of Technology | Tan D.,Guangdong Provincial Key Laboratory of Automotive Engineering | Luo Y.-T.,South China University of Technology | Luo Y.-T.,Guangdong Provincial Key Laboratory of Automotive Engineering
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2012

Proposed in this paper is a novel power shift transmission that inherits the advantages of power shift of dual-clutch transmission and achieves more speed ratios with limited gear pairs. Then, based on further analyses of the structure and the mechanism of the transmission, a dynamic simulation model containing the shift dynamics models and the shift control models is established for the vehicle drive system, and the factors affecting the shift quality are analyzed and optimized. Moreover, in order to verify the shift performance, the proposed simulation model is applied to the successive upshift of the transmission. The results show that the novel power shift transmi-ssion not only achieves 2(n+m) speed ratios with n+m fixed-axis gear pairs but also ensures high power shift quality.


Luo Y.-T.,Guangdong Provincial Key Laboratory of Automotive Engineering | Xie B.,Guangdong Provincial Key Laboratory of Automotive Engineering | He X.-C.,Guangdong Provincial Key Laboratory of Automotive Engineering
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | Year: 2012

Proposed in this paper is a SOC (State of Charge) estimation method to correct the initial error of SOC of the lithium-ion battery pack used in electric vehicles. The new method employs an algorithm combining the extended Kalman filtering with the Ampere-hour integral method. In the investigation, first, the advantages and disadvantages of several equivalent battery circuit models were analyzed, and the improved PNGV model with double RC parallel networks was selected to perform the parameter identification of a lithium-ion battery. Then, a nonlinear dynamic model of the battery in the state-space form was constructed with the help of the improved PNGV model, and the relationship between the open circuit voltage and the corresponding SOC of the battery was analyzed based on the polynomial fitting. Finally, some experiments in the conditions of constant-current pulse discharge and ECE15 were carried out. The results indicate that the proposed algorithm effectively corrects the initial error of SOC and guarantees the estimation accuracy of SOC.


Chen J.,South China University of Technology | Chen J.,Guangdong Provincial Key Laboratory of Automotive Engineering | Li L.,South China University of Technology | Lan F.,South China University of Technology | And 2 more authors.
Qiche Gongcheng/Automotive Engineering | Year: 2015

For reducing the thermal load of vehicle dashboard, a numerical simulation on the heat transfer process of vehicle is carried out under the summer weather condition in Hainan based on heat balance equation, with an interior temperature field obtained well agreeing with experimental results. Based on this, the effects of different heat transfer modes and other factors on the temperature field of dashboard are analyzed. The results indicate that the radiation and conduction are the main factors affecting the temperature field of dashboard. Reducing the transmittance of front windshield, putting on sun visor, reasonably increasing the thermal conductivity coefficient of dashboard and selecting appropriate parking place can significantly reduce the thermal load of dashboard. © 2015, SAE-China. All right reserved.


Zhou Y.,South China University of Technology | Zhou Y.,Guangdong Provincial Key Laboratory of Automotive Engineering | Lan F.,South China University of Technology | Lan F.,Guangdong Provincial Key Laboratory of Automotive Engineering | And 2 more authors.
Thin-Walled Structures | Year: 2011

In the paper, crashworthiness of the S-shaped rail extracted from the frontal frame in a car is studied. In order to reduce the peak impact force while increasing the total absorbed energy, the hybrid materials are employed in that rail, where aluminum alloy is used for its front part and advanced high strength steel (AHSS) for its back part. By designing 16 experiments based on orthogonal experiment, the effect of five influence factors with four levels on the crash performance of the steelaluminum hybrid S-shaped front rail is emphatically investigated. These influence factors include the different material types of aluminum alloy and AHSS, the sheet thicknesses of the two parts, and length proportion for the aluminum part. The AHSS includes dual-phase (DP) steel, transformation induced plasticity (Trip) steel and Mart steel; the aluminum alloy series include 5000 and 6000 series. The research result shows that the use of steelaluminum hybrid materials can reduce the peak impact force and the total weight for the S-shaped front rail, while the total absorbed energy can be greatly increased, so the crashworthiness and lightweight of the S-shaped front rail are significantly improved. © 2010 Elsevier Ltd. All rights reserved.


Zeng Z.,South China University of Technology | Zeng Z.,Guangdong Provincial Key Laboratory of Automotive Engineering | Lan F.,South China University of Technology | Lan F.,Guangdong Provincial Key Laboratory of Automotive Engineering | And 2 more authors.
Proceedings - 2016 8th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2016 | Year: 2016

Application of computer simulation techniques in traffic reconstruction will contribute to the sustainable development of protection of pedestrians and driver. In this paper, introducing National Automobile Accident In-Depth Investigation System, Nais. The proposed database establishment could handle data while cases accumulate to a certain degree. Based on its strict workflow and thought process, take a collision accident as an example, collecting accident information, using PC-CRASH to reconstruct this accident. Evaluating consistency of simulation results and accident. Finally, in the light of this vehicle, making safe evaluation and analyzing the reason of airbag unexploded. The proposed database provides a powerful and extensible framework that is particularly well suited to analyzing big variety data in traffic accident. © 2016 IEEE.


Zang M.,South China University of Technology | Zang M.,Guangdong Provincial Key Laboratory of Automotive Engineering | Qin T.,South China University of Technology | Qin T.,Guangdong Provincial Key Laboratory of Automotive Engineering
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2010

It is very necessary to replace experimental test by a numerical model of wheel impact test in order to reduce experimental times and improve design efficiency. A finite element model of A-alloy wheel impact test is established based on fully consideration of static and dynamic behaviors of impact test stand. The whole model includes impact block, wheel & tire assembly and test stand. The rubber supports are simulated by using spring-damper elements, and the prestressing of the wheel & tire assembly is applied as the initial condition, the impact process is solved by the transient dynamic explicit finite element software LS-DYNA. The simulation model is verified by comparing the simulation results with experimental results of the strain on some measuring points. It is obvious that finite element models have a guiding significance and practical value for initial design and development of the A-alloy wheel. ©2010 Journal of Mechanical Engineering.


Jiang L.B.,Guangdong Provincial Key Laboratory of Automotive Engineering | Chen Z.M.,South China University of Technology | Wu Y.Q.,South China University of Technology
Applied Mechanics and Materials | Year: 2014

Panoramic parking assistant system demands for the high performance of hardware when capturing, storing, processing image and demands for capturing from four video sources. This paper analyzes the microprocessor TM320DM642 and TM320DM6467(DM642 and DM6467 for short), both of which are based on the DaVinci technology, and presents two solutions for four video capturing and processing, as "DM642+TVP5150" and "DM6467+TVP5158". Hardware platform based on DM642 has been established and tested. High resolution panoramic video of bird's-eye view is rendered smoothly on the platform. The result shows that microprocessor of DaVinci technology has excellent performance for the panoramic parking assistant system, and DM642 microprocessor meets the hardware demands of the panoramic parking assistant system. © (2014) Trans Tech Publications, Switzerland.


Zhou Y.-J.,South China University of Technology | Zhou Y.-J.,Guangdong Provincial Key Laboratory of Automotive Engineering | Lan F.-C.,South China University of Technology | Lan F.-C.,Guangdong Provincial Key Laboratory of Automotive Engineering | And 4 more authors.
Cailiao Kexue yu Gongyi/Material Science and Technology | Year: 2011

To solve the connection problem of steel-aluminum hybrid car-body, experimental research and finite element (FE) simulation analysis were carried out to study the feasibility of joining steel sheet and aluminum sheet by using mechanical clinching. Based on the feasibility of experimental verification, aiming at obtaining high-quality joints with optimal properties in shear and tensile strength, the multi-objective optimization for the geometric parameters of the clinching tool was performed by comprehensively using the methods of experimental design, statistical analysis, Meta-modeling of response surface method (RSM) and genetic algorithm (GA). The goal was to maximize both of the neck thickness and undercut value of the clinching joint. The result of solution set for Pareto front is obtained, which can provide engineers with a wide range of possible options.

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