Dynamics of Automobile Suspension Systems

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This Demonstration considers a quarter vehicle model comprising a tire, spring, damper and body mass. The plots represent the vertical displacements (m) of both the body mass and the unsprung mass (tire).

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The system can be represented by two equations of motion:

and

.

As increases, the oscillating response increases in both magnitude and duration. Damping causes the system to eventually settle at 0. Specific parameters for a vehicle determine its response to various road conditions.

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Contributed by: Amir Sweis and Joshua Steimel (August 2022)
Open content licensed under CC BY-NC-SA


Snapshots


Details

Snapshot 1: hard damping

Snapshot 2: weak dampening

Snapshot 3: long time behavior

Reference

[1] S. Lajqi and S. Pehan, "Designs and Optimizations of Active and Semi-active Nonlinear Suspension Systems for a Terrain Vehicle," Strojniški vestnik - Journal of Mechanical Engineering, 58(12), 2012 pp. 732–743. doi:10.5545/sv-jme.2012.776.



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