Calibration procedure for a permanently powered relative steering wheel angle sensor with power-loss indication

摘要

A method is disclosed for determining a steering wheel angle calibration reference value in a vehicle. The vehicle includes a relative steering wheel angle sensor, which is unique in that it receives power directly from the vehicle's battery and interacts with the vehicle's car area network. The vehicle also includes an active yaw controller that interacts with the vehicle's car area network. The steering wheel angle calibration reference value only needs to be updated when power to the relative steering wheel angle sensor has been interrupted.