A high-frequency first-principle model of a shock absorber and servo-hydraulic tester

Czop, Piotr; Sławik, D.

doi:10.1016/j.ymssp.2011.01.011

Cited by 53 publications

(42 citation statements)

References 10 publications

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“…for damping fine tuning) and for active and semi-active suspension testing. 19 This sort of testing is particularly suitable for the validation of simulation models. In the motorsport area, a socalled seven-poster rig (i.e.…”

Section: Introductionmentioning

confidence: 99%

Reproduction of real-world road profiles on a four-poster rig for indoor vehicle chassis and suspension durability testing

Chindamo

Gadola

Marchesin

2017

Advances in Mechanical Engineering

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Indoor testing should reproduce the real-world environment in order to be effective. In this article, an efficient methodology to reproduce road profiles on a four-poster rig is presented: such a method includes a complex rig control strategy based on an iterative process. Road profiles come from a purposely designed set of sensors fitted on the car which remains the same regardless of the vehicle or surface type. Particular stresses such as speed humps, potholes and manholes can be reproduced as well. Since there are no previous similar studies, a validation is provided by comparing road and rig data streams and using the maximum absolute error and root mean square error as performance indexes. Results show that the rig is able to reproduce road profiles and the related inputs to the vehicle successfully; hence, the method is reliable and effective.

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Section: Introductionmentioning

confidence: 99%

Reproduction of real-world road profiles on a four-poster rig for indoor vehicle chassis and suspension durability testing

Chindamo

Gadola

Marchesin

2017

Advances in Mechanical Engineering

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“…The shock-absorber force is related to the pressure loss across a simple throttle valve. 22,23 The pressure loss is connected with the volume flows A A ð _ q 1x À _ q sx Þ and A B ð _ q 1x À _ q sx Þ between chambers A and B of the shock-absorber…”

Section: Model Of the Horizontal Suspension With Seated Human Bodymentioning

confidence: 99%

Shaping the vibro-isolation properties of horizontal seat suspension

Maciejewski

Krzyżyński

Meyer³

et al. 2017

Journal of Low Frequency Noise, Vibration and Active Control

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In this paper, an effective procedure of shaping the vibro-isolation properties of seat suspension system is presented. The simulation model is created to determine the dependence of evaluation criteria to the design parameters by means of which the system characteristics are formed. The developed optimisation procedure allows to find Pareto-optimal system configuration for the conflicted vibro-isolating criteria, i.e. the frequency weighted transmissibility factor used to evaluate dynamic seat comfort based on acceleration signals and the suspension travel. In order to optimise both the conflicted vibro-isolation criteria, a minimising of the transmissibility factor (primary criterion) is proposed taking into account the suspension travel that is transferred to a non-linear inequality constraint. The correctness of proposed procedure is evaluated using experimental research of the best solution of horizontal seat suspension. This research is performed using the passive system with optimal visco-elastic characteristics, which are selected especially for the welldefined input vibration. The satisfactory agreement of experimental and numerical results is obtained for the analysed vibration reduction system.

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“…In general, steady-state flow has been assumed. Should experimental data from the pressure-flow rate relation be available, they may be directly input into the model [23]. The principal drawback of this method is that the flow pressure relation is not parametric.…”

Section: Flow-pressure Relationsmentioning

confidence: 99%