Experimental Nonlinear System Identification of a Shock Absorber Focusing on Secondary Ride Comfort

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

A continuously rising level of virtualization throughout all development phases plays an important key role to reduce real hardware tests and the corresponding amount of expensive prototypes. Highly accurate models are necessary to transfer test drives on the road to complex multibody simulations or to enable a subjective evaluation on a dynamic driving simulator, respectively. Simultaneously, highly automated and autonomous driving leads to increased customer requirements regarding ride comfort characteristics, especially due to road excited vibrations. Since the automotive shock absorber is a central element in the process of suspension tuning, modeling its complex nonlinear dynamic behavior is crucial. Therefore, a new modular and real-time capable modeling concept based on local linear model networks is proposed in this contribution. Extensive component measurements of various shock absorber setups focusing on different secondary ride comfort characteristics were carried out and serve as a reference for both parameterization and the definition of required model accuracy. An efficient process of model parameter and topology optimization is shown. In this context, the model is validated by using stochastic excitations derived from real full vehicle measurements on representative roads.

Details

Original languageEnglish
Title of host publication12th International Munich Chassis Symposium 2021
EditorsPeter Pfeffer
PublisherSpringer Vieweg Berlin, Heidelberg
Pages218-240
Number of pages23
ISBN (electronic)978-3-662-64550-5
ISBN (print)978-3-662-64549-9
Publication statusPublished - 2022
Peer-reviewedYes

Publication series

SeriesProceedings
Volume2198-7432

Conference

Title12th International Munich Chassis Symposium (chassis.tech plus)
Duration29 - 30 June 2021
CityMunich
CountryGermany

External IDs

ORCID /0000-0002-0679-0766/work/167707753
unpaywall 10.1007/978-3-662-64550-5_13

Keywords

Keywords

  • Local linear model network, Nonlinear system identification, Real-time capable vehicle simulation, Ride comfort, Shock absorber modeling