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Empirical Modeling of a Hydraulic Actuator in a Vehicle Control System

Author

Listed:
  • Jin-Oh Hahn
  • Jae-Woong Hur
  • Young Man Cho
  • Kyo Ii Lee

Abstract

The pressure information of a hydraulic actuator plays a key role in modern vehicle control and fault diagnosis. The difficulty in measuring pressure directly naturally motivates such an indirect approach as an observer whose accuracy depends heavily upon the availability of a high fidelity model of a hydraulic actuator. Notwithstanding its success in understanding the dynamics of the first principle model of a hydraulic actuator, it is not suited to controller/observer design due to its complexity. This paper presents an alternative to the first principle modeling methodology: an empirical approach to hydraulic actuator modeling. Linear and nonlinear system identification techniques are applied to obtain low-order models of a hydraulic actuator. Experimental results show how the empirical models reproduce the key features of a hydraulic actuator with sufficient accuracy.

Suggested Citation

  • Jin-Oh Hahn & Jae-Woong Hur & Young Man Cho & Kyo Ii Lee, 2003. "Empirical Modeling of a Hydraulic Actuator in a Vehicle Control System," Mathematical and Computer Modelling of Dynamical Systems, Taylor & Francis Journals, vol. 9(2), pages 193-208, June.
    • Handle: RePEc:taf:nmcmxx:v:9:y:2003:i:2:p:193-208
    DOI: 10.1076/mcmd.9.2.193.16519
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