Development and Analysis of a Detail Model for Steer-by-Wire Systems

Abstract

Steer-by-wire systems represent a key technology for highly automated and autonomous driving. In this context, robust steering control is a fundamental precondition for automated vehicle lateral control. However, there is a need for improvement due to degrees of freedom, signal delays, and nonlinear characteristics of the plant which are unconsidered in the design models for the design of current steering controls. To be able to design an extremely robust steering control, suitable optimal models of a steerby-wire system are required. Therefore, this paper presents an innovative nonlinear detail model of a steer-by-wire system. The detail model represents all characteristics of a real steer-by-wire system. In the context of a dominance analysis of the detail model, all dominant characteristics of a steer-by-wire system, including parameter dependencies, are identified. Through model reduction, a reduced model of the steerby-wire system is then developed that can be used for a subsequent robust control design. Furthermore, this paper compares the steer-by-wire system with a conventional electromechanical power steering and shows similarities as well as differences.

A Systematic Review and Future Development of Automotive Chassis Control Technology

“…As shown in Figure 1, the automotive steering system has gone through several stages including a mechanical steering system, hydraulic-power-assisted steering (HPS) system, electro-hydraulic-power-assisted steering (EHPS) system, electric-power-assisted steering (EPS) system, and a steer-by-wire (SBW) system [7,8]. The wire-controlled steering system eliminates the mechanical connection between the steering wheel and the steering wheel compared to EPS [9][10][11][12][13][14].…”

Research on Variable Transmission Ratio Control Method to Improve Vehicle Handling Comfort Based on Steer-by-Wire System

“…The adoption of steer-by-wire technology, characterized by the substitution of traditional mechanical linkages with actuators, has garnered increased interest among researchers in recent times [6][7][8][9]. Owing to the mechanical limitations inherent in traditional steering systems, these constraints impede the potential of variable transmission ratio control strategies.…”