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Accumulated tolerance analysis of suspension by geometric tolerances based on multibody elasto-kinematic analysis

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Abstract

Tolerance design of vehicle suspension is an important factor that affects the ride and handling quality and cost of the vehicle. Also, applying geometric tolerance to an analysis model is found to be a difficult process. This paper presents a method for tolerance analysis of wheel alignment of vehicle suspension. Monte-Carlo simulation method is applied to multibody elasto-kinematic model to analyze the accumulated geometric tolerances. As an example, Macpherson Strut Type front half car model is used, and wheel alignment dispersion and contribution ratio to the dispersion by accumulated geometric tolerances is computed. This paper also presents an efficient modeling and analysis method for elasto-kinematic model of vehicle suspensions by computing the stiffness matrix analytically. The simulation results of a Macpherson Strut Type demonstrates the validity and accuracy of the proposed method.

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Abbreviations

Ai :

rotation matrix of body fixed ref. frame of body i

C:

compliance matrix

F′:

force and moment vector

fc :

cartesian force vector

nc :

cartesian moment vector

K:

system stiffness matrix

\(\bar K\) :

global system stiffness matrix

q:

generalized coordinate

Q:

generalized force vector

δπ i :

virtual angular displacement of body i

δq :

virtual displacement of generalized coordinate

δz :

virtual displacement of cartesian coordinate of body

ω i :

angular velocity vector of body i

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Authors and Affiliations

  1. Suspension and Steering Development Team 1, Hyundai Motor Group, 150 Hyundaiyeonguso-ro, Namyang-eup, Hwaseong-si, Gyeonggi, 18280, Korea

    S. K. Kim

  2. Graduate School of Automotive Engineering, Kookmin University, Seoul, 02707, Korea

    S. S. Kim

  3. Chassis Platform Development Team, Hyundai Motor Group, 150 Hyundaiyeonguso-ro, Namyang-eup, Hwaseong-si, Gyeonggi, 18280, Korea

    Y. G. Cho

  4. Chassis CAE Team, Hyundai Motor Group, 150 Hyundaiyeonguso-ro, Namyang-eup, Hwaseong-si, Gyeonggi, 18280, Korea

    H. K. Jung

Authors
  1. S. K. Kim
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  2. S. S. Kim
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  3. Y. G. Cho
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  4. H. K. Jung
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Correspondence to S. S. Kim.

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Kim, S.K., Kim, S.S., Cho, Y.G. et al. Accumulated tolerance analysis of suspension by geometric tolerances based on multibody elasto-kinematic analysis. Int.J Automot. Technol. 17, 255–263 (2016). https://doi.org/10.1007/s12239-016-0025-x

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  • DOI: https://doi.org/10.1007/s12239-016-0025-x

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