Linear-Time Invariant Modelling of Electrohydraulic Cylinders

Petter H. Gøytil, Damiano Padovani, Michael R. Hansen

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


This paper considers linear time-invariant modeling of electro hydraulic cylinders for feedback control design, analysis, and system identification. Traditionally, these actuators have been analyzed and modeled under the assumption that the dynamics of the electric prime mover are either negligible or may be approximated using lower-order transfer functions. In this paper, the validity of this assumption is examined and linear time-invariant modeling based on the full governing equations of the system is investigated as an alternative. Using frequency domain analysis and numerical simulation, it is shown that the conventional methods based on lower-order approximations may significantly misrepresent the dynamics of the system and that a more detailed approach is required to accurately capture the dynamics of the system. The results demonstrate the need for and importance of careful consideration and modeling of the electric drive in the study of electro hydraulic cylinders.
Original languageAmerican English
Title of host publicationIEEE 2nd International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
StatePublished - 2022


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