Road friction estimation using adaptive observer with periodical σ-modification

Hikaru Nishira, Taketoshi Kawabe, Seiichi Shin

Research output: Contribution to conferencePaper

15 Citations (Scopus)

Abstract

We propose here an adaptive observer for estimation of a road friction coefficient, which is important for vehicle control. The observer needs driving torque and wheel speeds of driven and non-driven wheels as inputs. The road friction coefficient is assumed to be represented by a product of a known function and an unknown parameter to be estimated by an adaptive law. It is shown that non-robust adaptive law can get the true value, if there are no disturbance. However, it diverges when disturbances are added. Periodical σ-modification is proposed here as a robust adaptive law. The estimation robustness against disturbances can be improved with the law. Numerical simulation results are presented to show the effectiveness of the law.

Original languageEnglish
Pages662-667
Number of pages6
Publication statusPublished - Dec 1 1999
Externally publishedYes
EventProceedings of the 1999 IEEE International Conference on Control Applications (CCA) and IEEE International Symposium on Computer Aided Control System Design (CACSD) - Kohala Coast, HI, USA
Duration: Aug 22 1999Aug 27 1999

Other

OtherProceedings of the 1999 IEEE International Conference on Control Applications (CCA) and IEEE International Symposium on Computer Aided Control System Design (CACSD)
CityKohala Coast, HI, USA
Period8/22/998/27/99

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering

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    Nishira, H., Kawabe, T., & Shin, S. (1999). Road friction estimation using adaptive observer with periodical σ-modification. 662-667. Paper presented at Proceedings of the 1999 IEEE International Conference on Control Applications (CCA) and IEEE International Symposium on Computer Aided Control System Design (CACSD), Kohala Coast, HI, USA, .