0
Research Papers

Torque Neutrality for Active Steering Systems

[+] Author and Article Information
Jonas Müller

 BMW Group Forschungs- und Innovationszentrum, Knorrstr. 147, 80788 Munich, Germanyjonas.mueller@bmw.de

For example, Audi: “Dynamic Steering”—2008, Lexus: “Vehicle Dynamics Management”—2005, Nissan: “4 Wheel Active Steer”—2004, Toyota: “Active Steer”—2003, Renault: “4 Control”—2006.

Appropriately, scaled versions of δW , δS , and δR when referenced to the steering rack position are named xW , xS , and xR , respectively, see Sec. 4.

Note that this kind of activation would not occur in a serial-production environment.

J. Dyn. Sys., Meas., Control 134(5), 051015 (Jul 27, 2012) (6 pages) doi:10.1115/1.4006631 History: Received October 04, 2011; Accepted April 13, 2012; Published July 26, 2012; Online July 27, 2012

This paper outlines a method for using an active steering system with two electrical actuators (one power-steering actuator and one superposition actuator) in order to manipulate the steering rack position without torque feedback to the steering wheel. To this effect, the power-steering actuator is used to implement a feed-forward control in order to compensate for the inertial effect introduced by the angle superposition. A rudimentary steering system model is used to derive the relevant transfer functions and assemble the control law for the superposition actuator. Experimental results of a research project at the BMW Group are included.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Sample active steering system overview

Grahic Jump Location
Figure 2

Gearbox schematic

Grahic Jump Location
Figure 3

Gearbox lever model

Grahic Jump Location
Figure 4

Steering system replacement model (all displacements, rotations, and inertias referenced to steering rack position)

Grahic Jump Location
Figure 5

Friction model [9]

Grahic Jump Location
Figure 6

Model performance evaluation

Grahic Jump Location
Figure 7

System performance

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In