DETERMINING OF THE ABSOLUTE ANGULAR POSITION OF A STEERING WHEEL BY MEANS OF AN INCREMENTAL MEASUREMENT AND THE MEASUREMENT OF THE DIFFERENTIAL VELOCITY OF WHEELS

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 DELTA V/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 DELTA V/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).