Real-Time Calibration of the Steering Wheel Angle Sensor
A stationary or temporary offset in the steering system of a vehicle
can result in functions, relying on the steering wheel angle,
performing poorly. Due to the wide range of different vehicle
configurations at Scania CV, all sensors with relevant information
regarding vehicle direction are not available on all vehicles. By
using a statistical approach, including common sensors installed on
the vehicle, a conceptual algorithm calibrating the Steering Wheel
Angle Sensor offset in real-time has been developed. The algorithm is
simple and relies on the assumption that a vehicle is driving straight
ahead most of the time above a certain minimum vehicle speed, thus the
most frequent steering wheel angle is the straight ahead angle. The
algorithm is only active above the certain minimum vehicle speed and
consists of two moving windows comprising steering wheel angle samples
in which the calculations are performed. The results show that the
algorithm is able to detect offsets with a short calibration
time. Storage of samples is required but no vehicle specific
parameters are needed.
Nils Larsén
2017
Informationsansvarig: webmaster
Senast uppdaterad: 2021-11-10
LiU Homepage
