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:
Apr. 24, 2012
Filed:
Sep. 28, 2007
Eray Yasan, Canton, MI (US);
Sethu Madhavan, Canton, MI (US);
Chaminda Basanyake, Windsor, CA;
Craig Markyvech, Romulus, MI (US);
Abhijit Patil, Westland, MI (US);
Eray Yasan, Canton, MI (US);
Sethu Madhavan, Canton, MI (US);
Chaminda Basanyake, Windsor, CA;
Craig Markyvech, Romulus, MI (US);
Abhijit Patil, Westland, MI (US);
General Motors LLC, Detroit, MI (US);
Abstract
A software compass used during a GPS outage calculates vehicle heading and presents it upon request. The software compass gathers information from a yaw rate sensor, wheel steering angle sensor, wheel speed sensor, and PRNDL gear position sensor to calculate vehicle heading using a weighting algorithm. Because the yaw rate sensor data is a central factor in calculating vehicle heading, the quality of calibration of the yaw rate sensor is of importance. The disclosed calibration algorithm calculates the yaw rate bias and scale factors to calibrate the yaw rate sensor.