Abstract: In a method for determining a coefficient of friction between a motor vehicle tire of a motor vehicle and the surface of a roadway, a first coefficient of friction parameter (?est—used,ij) is determined using a model (RM) in which a functional correlation between the first coefficient of friction parameter (?est—used,ij) and a slip (Sij) of the motor vehicle tire is set. A second coefficient of friction parameter (?quasi—meas—used,ij) is determined from the quotient between a longitudinal force (FL) and a vertical force (FZ) of the motor vehicle tire. The first and the second coefficient of friction parameters (?est—used,ij, ?quasi—meas—used,ij) are used to determine the coefficient of friction (?R,ij) by a recursive estimation algorithm.

Abstract: In order to determine a signal offset (OFF_SIG) of a pitch rate sensor of a vehicle (2), a signal (OMEGA_TETA_SIG) from the pitch rate sensor is detected. Longitudinal acceleration (ACC) of the vehicle (2) is determined. A time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is determined. A check is carried out in order to determine whether a magnitude of the time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is less than a first predefined threshold value (THD—1). The signal offset (OFF_SIG) of the pitch rate sensor is determined on the basis of the signal (OMEGA_TETA_SIG) from the pitch rate sensor if the magnitude of the time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is less than the first predefined threshold value (THD—1).

Abstract: A method and device for monitoring the noise from a sensor and a use of the method in automobiles for determining a frictional value between tyres of a motor vehicle and a road surface, in particular an economical and reliable method for monitoring a sensor noise and a corresponding device for obtaining, amongst other things, system-relevant information may be achieved, wherein an influence on spectral components of the sensor noise signal is determined and compared with set values.

Abstract: In a method for operating a vehicle (1) having a plurality of wheels (3) and wheel sensors (5) which are associated with said wheels and whose measurement signals are representative of angular speeds of the respective wheels (3), respective scaling values (SV1, SV2, SH1, SH2) are adapted when a predefined condition is met, the condition depending on the yaw rate (GR) of the vehicle and/or on the steering angle (LW) of the front/rear wheels.

Abstract: Depending on a sensor signal, a noise signal which suppresses a useful signal spectrum of the sensor signal is determined by filtering using a filter. A noise variable, which is a measure of a noise of the sensor signal, is determined depending on the noise signal. An error of the sensor signal is identified depending on the noise variable determined.

Abstract: 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 ?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 ? 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.