The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 2004
Filed:
Jan. 13, 2003
Yixin Yao, Ann Arbor, MI (US);
Gregory J. Stout, Ann Arbor, MI (US);
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
The present invention involves a method of controlling a vehicle steer-by-wire system having two independent road wheels. In one embodiment, the method comprises providing a steering wheel control sub-system to generate road wheel reference angles and to produce steering feel for a vehicle driver. The method further includes providing a road wheel control sub-system including a multivariable road wheel controlled plant and a multivariable-road wheel controller for controlling actual road wheel angles to track to road wheel reference angles within a servo control system structure having road wheel angular position feedback and road wheel angular rate feedback loops. Moreover, the method includes implementing the multivariable road wheel controller to control tracking of the actual left and right wheel angles with the left and right road wheel reference angles, respectively. The method further includes decoupling the left and right road wheel angles with the multivariable road wheel controller in the road wheel servo control system. The multivariable road wheel controller controls the left and road wheel angle based only on the left road wheel reference angle independent of the right road wheel reference angle. Also, the multivariable road wheel controller controls the right road wheel angle based only on the right road wheel reference angle independent of the left road wheel reference angle.