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:
Mar. 04, 2003
Filed:
Mar. 01, 2002
W. Todd Watson, Belleville, MI (US);
Alan J. Riggs, Ann Arbor, MI (US);
Automotive Systems Laboratory, Inc., Farmington Hills, MI (US);
Abstract
A rollover condition is detected responsive to the comparison of a figure of merit with a threshold, wherein the threshold is given generally as a function of a period of time commencing with a time of inception determined from one or both of a measure of lateral acceleration and a measure of angular velocity. The measures of lateral acceleration and angular velocity are filtered, and are compensated to remove offset errors. In one embodiment, the figure of merit comprises a measure function that incorporates a damping term and a product term. The product term comprises a force measure and a kinetic energy measure, wherein the force measure is responsive to the measure of lateral acceleration, and the kinetic energy measure is responsive to the measure of angular velocity. The product term may further comprise a potential energy measure that is responsive to a measure of roll angle.