Research on Dynamic Modelling for Hydraulic Power Automotive Steering Systems with Nonlinear Friction

The paper introduces a comprehensive mathematical model for power steering systems mounted on cars. Dynamic modelling for the steering system is studied in consideration of nonlinear friction forces in the system such as friction in the steering column, friction in the steering mechanism (gear and rack), friction between tires with road. The dynamic modelling for both the mechanism subsystems and the hydraulic subsystem is provided. Simulations were conducted to show the accuracy of the research model which can support further research on design for safer and more efficient driving systems.