Parametrization of a Real-Time Vehicle Model from Driving Tests for HiL Testing of Hydraulic Steering Systems

Hydraulic steering systems are used in construction and agricultural vehicles with high steering loads. Integration of advanced functionalities like driver-assistance systems and increased safety regulations requires the development of new steering system concepts like steer-by-wire systems. Hardware-in-the-loop (HiL) testing of physical steering systems in bidirectional interaction with a numerical vehicle model enables reproducible, safe and cost-efficient experimental analyses under various nominal and failure operating conditions in a laboratory environment. The present contribution describes the parametrization of a multibody vehicle model of an agricultural tractor based on measurements from driving tests and its integration into a HiL test bench for hydraulic steering systems. First results show the functionality of the HiL concept.