Application of LQ based semi-active suspension control in a vehicle

Andreas Unger, Frank Schimmack, Boris Lohmann, Ralf Schwarz

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Scopus citations

Abstract

A linear quadratic (LQ) based controller and observer concept for a semi-active fullcar model is implemented and validated using a real vehicle in this paper. Especially methods for the parametrization of the quadratic cost function are presented and it is shown in experiments, that ride comfort and road holding can be significantly improved by using semi-active suspension control. In order to take the nonlinearities like nonlinear component characteristics or suspension friction into account a parametrized nonlinear full-car model is presented, which is used for the determination of the controller cost function weights. The performance evaluation is done using a 4-poster test rig as well as measurements on a real road.

Original languageEnglish
Title of host publicationProceedings of the 18th IFAC World Congress
PublisherIFAC Secretariat
Pages1808-1813
Number of pages6
Edition1 PART 1
ISBN (Print)9783902661937
DOIs
StatePublished - 2011

Publication series

NameIFAC Proceedings Volumes (IFAC-PapersOnline)
Number1 PART 1
Volume44
ISSN (Print)1474-6670

Keywords

  • Braking distance
  • Control applications
  • Full-car
  • LQR
  • Semi-active suspension

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