Title:
ESTIMATION OF THE ROAD CONDITION UNDER A VEHICLE
Document Type and Number:
WIPO Patent Application WO2005068271
Kind Code:
A8
Abstract:
A system for estimating the ground condition under a driving vehicle, comprising: a wheel speed sensor (4) for sensing a wheel speed signal (t(n), omega(n)) which is indicative of the wheelpeed of a vehicle's wheel driving over the ground (2,3) and a first analyser unit (8) coupled to said wheel speed sensor (4). The first analyser unit comprises a sensor imperfection estimation section (9) which is designed to estimate a sensor imperfection signal, formula (I), from the wheel speed signal (t(n)) which is indicative of the sensor imperfection of the wheel speed sensor (4); a signal correction section (10) which is designed to determine an imperfection-corrected sensor signal (ɛ(n)) from the wheel speed signal (t(n)) and the sensor imperfection signal, formula (I); and a ground condition estimation section (11) which is designed to estimate a first estimation value (r(n) , alpha(n)) indicative of the ground condition from the imperfection-corrected sensor signal (ɛ(n)).
Inventors:
LINDSKOG PETER (SE)
SJOESTRAND NICLAS (SE)
DREVOE MARKUS (SE)
SJOESTRAND NICLAS (SE)
DREVOE MARKUS (SE)
Application Number:
PCT/EP2004/000113
Publication Date:
December 22, 2005
Filing Date:
January 09, 2004
Export Citation:
Assignee:
NIRA DYNAMICS AB (SE)
LINDSKOG PETER (SE)
SJOESTRAND NICLAS (SE)
LINDSKOG PETER (SE)
SJOESTRAND NICLAS (SE)
International Classes:
B60T8/00; B60T8/172; B60T8/173; (IPC1-7): B60T8/00
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