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:
Jul. 20, 1999
Filed:
Dec. 08, 1997
Jurgen Ackermann, Herrsching, DE;
Deutsche Forchungsanstalt fur Luft und Raumfahrt E.V., Cologne, DE;
Abstract
To support the driver of a road vehicle, a yaw velocity r (in radian/s) around a vertical axis is measured, a driving speed v.sub.x (in m/s) is determined, an acceleration a.sub.x (in m/s.sup.2) in the driving direction is measured, a lateral acceleration is measured at two randomly selected locations at a distance of l.sub.a as a.sub.y1 (in m/s.sup.2, front) and a.sub.y2 (m/s.sup.2, rear), a steering wheel angle .delta..sub.H is measured at the vehicle steering column with a potentiometer, a vehicle wheel angle .delta..sub.L =.delta..sub.H /i.sub.L commanded by the driver is computed, a variable angle .beta..sub.F at the front axis is computed, and these measured parameters are used to calculate, in a microprocessor, according to the equations (4, 20 and 21), an additional steering angle .delta..sub.C, whose addition to the vehicle wheel angle .delta..sub.L commanded by the driver results in the overall wheel angle .delta..sub.F =.delta..sub.L +.delta..sub.C.