Method for the Determination of Long-Term Offset Drifts of Acceleration Sensors in Motor Vehicles

摘要

A method for determining long-term offset drifts of acceleration sensors in a motor vehicle has the steps:—the longitudinal vehicle speed Vx is determined in the vehicle's center of gravity;—the share of the driving dynamics in the longitudinal reference acceleration formula (I) and in the transversal reference acceleration formula (II) is calculated from the longitudinal vehicle speed Vx and the yaw rate ω_Z;—the share of the driving dynamics in the reference acceleration on the vehicle level formula (III) is calculated by converting the driving dynamic reference accelerations formula (IV) calculated for the center of gravity to the position formula (V) and the orientation Θ of the sensor formula (VI);—the long-term offset drift of the sensor is determined from the measured values of the sensor and the share of the measured value in the driving dynamics by means of a situation-dependent averaging process.