Title: Modelling, parametrisation and validation of a truck steering-system to predict the steering-wheel torque

Authors: Jan Loof; Igo Besselink; Henk Nijmeijer

Addresses: Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, 5612, AP, The Netherlands ' Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, 5612, AP, The Netherlands ' Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, 5612, AP, The Netherlands

Abstract: The prediction of the steering-wheel torque in a steering-system is a challenging subject. The steering-system of a truck consists of many components, including a hydraulic power-steering system. A model is developed that includes the most important components. A Wheatstone bridge is used to model the hydraulic valve system. A flexible supply hose and compressible fluid in the cylinder chamber are taken into account. The model is parametrised using test-bench measurements. The model is validated by means of additional measurements on the same test-bench. The model is verified for quasi-static conditions and up till a frequency higher than a driver will ever use. The predictions of the steering-wheel torque, steering-wheel angle and pressures in the system are accurate for high torque amplitude inputs. For small inputs the model is still able to predict the steering-wheel torque with an error smaller than 10%.

Keywords: commercial vehicle; hydraulic power-steering; Wheatstone bridge; steering-system; steering-wheel torque prediction; parametrisation.

DOI: 10.1504/IJHVS.2021.114411

International Journal of Heavy Vehicle Systems, 2021 Vol.28 No.1, pp.55 - 78

Received: 16 Oct 2017
Accepted: 27 Apr 2018

Published online: 17 Apr 2021 *

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