Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (11): 3175-3183.doi: 10.13229/j.cnki.jdxbgxb.20230621

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Improved tilting method for vehicle mass center measurement

Ren-jun LI1(),Yi-bing ZHAO2,Li-dong GU1(),Hong-qiang TAN1,Lin-sen SONG1,Yan TIAN3   

  1. 1.School of Mechanical and Electrical Engineering，Changchun University of Science and Technology，Changchun 130022，China
    2.The No. 63850th Troop of PLA，Baicheng 137000，China
    3.Research and Development Center，BMW-Brilliance Automotive Ltd. ，Shenyang 110000，China
  • Received:2021-07-14 Online:2024-11-01 Published:2025-04-24
  • Contact: Li-dong GU E-mail:renjun.li@cust.edu.cn;gulidong@cust.edu.cn

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Abstract:

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.

Key words: vehicle, mass center measurement, improved tilting method, numerical simulation, tilting angle

CLC Number: 

  • TH39

Fig.1

Process of TM for car mass center"

Fig.2

Diagram of improved tilting method"

Fig.3

Simplified model of vehicle mass center measurement"

Fig. 4

Car force in Og coordinate"

Fig.5

Wheel force under Op coordinate"

Fig.6

Height of mass center in ITM"

Fig.7

Height calculation in vehicle mass center"

Fig.8

Testing process of ITM"

Fig.9

Design model of ITM test bench"

Fig.10

FE model for parallelogram mechanism"

Fig.11

Stress state of parallelogram mechanism"

Fig.12

Stress state of test bench frame"

Fig13

Simulation for car ITM test process"

Fig.14

Rotating angle of ITM test bench"

Fig.15

Angles of car in ITM， TM and test bench"

Fig.16

Prototype of ITM"

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