Method and device for estimating the temperature of an axle bearing of a wheelset of a rail vehicle

摘要

A method for estimating the temperature (T_{B, est}) of a wheel bearing of a wheelset of a rail vehicle by means of a calculation model (T_bearingestimator). The calculation model (T_bearing,estimator) estimates the temperature of the axle bearing, according to the speed (v_train) and the ambient temperature (T_amb) of the rail vehicle as input variables of the calculation model (T_bearing estimator), and the temperature of a component of the wheelset, different from the axle bearing but directly or indirectly connected to the axle bearing in a heat-conducting manner, is measured as the measuring temperature (T_meas) during operation. The temperature of the component different from the axle bearing is estimated by means of the calculation model (T_bearingestimator) as the estimated temperature (T_meas,est). In order to improve the accuracy of the calculation model (T_bearingestimator) in terms of the estimation of the temperature (T_B,est) of the axle bearing, the calculation model (T_bearingestimator) has a corrective element (K_b) that is used to continuously, temporarily or cyclically calibrate or adjust it on the basis of a comparison of the measuring temperature (T_meas) with the estimated temperature (T_meas,est).