Title: Modelling and identification of a hydrostatic transmission hardware-in-the-loop simulator

Authors: K. Wu, Q. Zhang, A. Hansen

Addresses: Department of Agricultural Engineering, University of Illinois, Urbana-Champaign Urbana, IL 61801, USA. ' Department of Agricultural Engineering, University of Illinois, Urbana-Champaign Urbana, IL 61801, USA. ' Department of Agricultural Engineering, University of Illinois, Urbana-Champaign Urbana, IL 61801, USA

Abstract: Hardware-in-the-loop (HIL) simulators are effective research and development tools in many applications. A hydrostatic transmission HIL simulator, consisting of dynamic models of the transmission system and the hardware of a variable-displacement axial-piston pump and a fixed-displacement gear motor, was developed for supporting vehicle transmission system research. This paper reports the identification of the system models of the HIL simulator. A linear parameter-varying (LPV) approach was used to model the simulator, and a swept-sine technique was used for identifying the models in the frequency domain. The identified model could cover the entire operating range by adopting measured or estimated parameters at corresponding steady state operating points, which was verified through a series of step and frequency response tests at different operating points. An acceptable correlation between the experimental and simulation results was observed.

Keywords: vehicle transmission; hydrostatic transmission; hardware-in-theloop simulator; simulator model; system identification.

DOI: 10.1504/IJVD.2004.003894

International Journal of Vehicle Design, 2004 Vol.34 No.1, pp.52 - 64

Published online: 10 May 2004 *

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