Determination of the absolute angular position of a steering wheel by incremental measurement and measuring the differential speed of the wheels,申请号US20070003528-传众专利搜索

Determination of the absolute angular position of a steering wheel by incremental measurement and measuring the differential speed of the wheels

申请公布号：US7605586(B2)

申请号：US20070003528

申请日期：2007.12.28

申请公布日期：2009.10.20

申请人：

S.N.R. ROULEMENTS

发明人：DESBIOLLES PASCAL;DURET CHRISTOPHE

分类号：G01B7/30;B62D15/02;G01D5/245

主分类号：G01B7/30

摘要：The system for determining the absolute angular position theta of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position delta of the steering wheel, a device (2) for measuring the differential velocity DeltaV/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate theta*(tn) of an absolute angular position theta(tn) according to the differential velocity DeltaV/V, the mean difference offset(tn) between the angular positions theta*(tn) and delta(ti), wherein i is a variant ranging from 0 to n and the absolute angular position theta(tn) by the addition between the mean difference offset(tn) and the angular position delta(tn).