Imperial College London
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DrDanielAinalis

Faculty of Engineering, Department of Civil and Environmental Engineering

Honorary Research Fellow
 
 
 
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Contact

 

d.ainalis Website

 
 
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Location

 

Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Ainalis:2014,
author = {Ainalis, DT and Rouillard, V and Sek, MA},
pages = {323--331},
title = {Issues with the experimental characterisation of automotive shock absorbers for vehicle dynamic simulations},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - Establishing the dynamic characteristics of wheeled vehicles is important for a number of applications including predicting the dynamic behaviour of vehicles and ride quality to transport vehicle occupants and products. Numerous approaches exist to estimate the dynamic characteristics of vehicles, however it is unclear which method establishes the true dynamic characteristics and is further complicated by vehicle suspension systems, which are typically nonlinear. As part of a broader research initiative, the authors are currently undertaking research into an evaluation of the various methods used to establish the dynamic characteristics of vehicles with a simple, idealised vehicle (physical quarter car). During the evaluation experiments, it was revealed that the factory-fitted shock absorber exhibited significantly nonlinear characteristics. For comparison, a second nominally-linear shock absorber was commissioned for use with the physical quarter car. To evaluate and characterise the two shock absorbers, they were mounted (one at a time) into a universal testing machine and subjected to various excitations, including constant-velocity actuations, various sinusoidal displacements and broadband random excitations. The original shock absorber was found to be extremely dependent on not only the velocity, but also the frequency, direction of motion and also the displacement amplitude. The custom-made linear shock absorber was found to exhibit far less variation in the damping and is notably not dependent on the direction of motion. The results presented highlight the difficulties encountered in characterising even a single component of a vehicle; the process is not straightforward and care must be exercised when selecting a suitable testing method.
AU  - Ainalis,DT
AU  - Rouillard,V
AU  - Sek,MA
EP  - 331
PY  - 2014///
SP  - 323
TI  - Issues with the experimental characterisation of automotive shock absorbers for vehicle dynamic simulations
ER  -
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