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:
Nov. 09, 2004
Filed:
Jun. 04, 2003
Applicant:
Inventor:
Hyeongcheol Lee, Ann Arbor, MI (US);
Assignee:
Visteon Global Technologies, Inc., Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 3/00 ; G01F 1/500 ;
U.S. Cl.
CPC ...
G01P 3/00 ; G01F 1/500 ;
Abstract
A method and system for vehicle velocity estimation. The method and system effectively combine vehicle kinetic and kinematic models to determine the noise covariance or reliability of vehicle sensor signals, and vehicle approximated velocity. The vehicle approximated velocity, sensor signals, and noise covariances are used in conjunction with a Kalman filter to determine the estimated velocity of the vehicle. The noise covariance is calculated from the relationship between various sensor signals and calculated values by determining if the sensor signal and calculated values correspond to a vehicle operating state.