When measuring the position of vehicle mass center by Tilting Method(TM), there would be some problems such as inaccurate calculation of tire force point and large tilting of the vehicle, so Improved Tilting Method(ITM) is proposed in this paper. In the process of measuring the position of vehicle mass center by ITM, the force direction of the tire is always straight up, which does not need to design additional wheel load weighing device and can reduce the influence of adverse factors such as friction. In order to keep the supporting plates horizontal, a parallelogram mechanism is used to constrain them. Based on the balance of static force and moment, the calculation model of ITM is established. By means of numerical simulation, the key components of the system were verified and the measurement process was simulated. The results show that the stiffness and strength of parallelogram mechanism and test bench frame meet the safety requirements. To determine the vehicle mass center, the vehicle titling angle by ITM is smaller than that by TM, which means that ITM can supply higher precision and better experiment safety.
ZhengDe-xi. Research on driving and handling stability of three-axle heavy vehicle[D]. Qinhuangdao: School of Mechanical Engineering, Yanshan University, 2021
LiTao, LuHai-bo, LinFan-ye, et al. Effect of center of mass height on vehicle dynamic performance[J]. Automotive Practical Technology, 2019(3): 110-112.
[5]
BrancatiR, RussoR, SavinoS. Method and equipment for inertia parameter identification[J]. Mechanical Systems and Signal Processing, 2010, 24(1): 29-40.
LiJun-peng, GuYu-qing, ChenHua-jie. Application of stable pendulum method in the height measurement of automobile center of mass and uncertainty evaluation[J]. China Inspection and Testing, 2020, 28(2): 42-45.
YangLi-jun. Technology research of vehicle center of mass measurement table based on roll method[D]. Harbin: School of Mechanical Power Engineering, Harbin University of Science and Technology, 2015.
JiaXiao-dong, XiangFei. Verification method for measuring the height of center of mass of automobile by tilting table[J]. Equipment Manufacturing Technology, 2022(4): 95-98.
TangPing-jian, SunZe-lin, ZhangPan, et al. Error analysis of centroid measurement of special vehicle based on three-point support[J]. Journal of Ordnance Equipment Engineering, 2021, 42(7): 234-238.
ZhongJiang, ZhaoZhang-feng, QiaoXin, et al. Center of mass measurement system and error analysis based on three-point support[J]. China Mechanical Engineering, 2010, 21(12): 1469-1472.
QiuYin-yan, XiongYun, LiJian-bin. Research on vehicle centroid position measurement platform based on mass response method[J]. Agricultural Equipment and Vehicle Engineering, 2018, 56(9): 88-90.
[18]
ElaalS M A. Empirical equations to predict the tractor center of gravity[J]. Ama Agricultural Mechanization in Asia Africa & Latin America, 2009, 40(3): 64-68.
[19]
FabbriA, MolariG. Static measurement of the centre of gravity height on narrow-track agricultural tractors[J]. Biosystems Engineering, 2004, 87(3): 299-304.
WangDe-min, ZhangLong-yi, XuZhen-quan, et al. Design and analysis of center of mass measuring machine for land vehicle[J]. Journal of Changchun University of Science and Technology (Natural Science Edition), 2021, 44(3): 76-82.
[22]
ZhangQ, JinX, ZhouK, et al. Novel design method of cog measurement system via supporting reaction method[J]. Journal of Beijing Institute of Technology, 2020, 29(2): 251-259.
[23]
GobbiM, MastinuG, PreviatiG. A method for measuring the inertia properties of rigid bodies[J]. Mechanical Systems&Signal Processing, 2011, 25(1): 305-318.
[24]
MastinuG, GobbiM, MianoC M. The influence of the body inertia tensor on the active safety and ride comfort of road vehicles[J]. Journal of Passenger Car: Mechanical Systems Journal, 2002, 111(6): 1980-1990.