A road surface friction coefficient estimating device (40; 102) includes an electronic control unit. The electronic control unit is configured to: compute a system noise variance value as an index indicating a degree of variation in a road surface friction coefficient estimation value; compute an observation noise variance value as an index indicating a degree of variation in observation noise; compute, with regard to an observation deviation, an index indicating a degree of shift of the observation deviation that is newly obtained as to an index indicating a degree of past variation in the observation deviation; compute the index as a friction coefficient change amount; compute a Kalman gain; and add in the friction coefficient change amount when computing the system noise variance value.Selected Drawing: FIG. 3
ROAD SURFACE FRICTION COEFFICIENT ESTIMATING DEVICE
VORRICHTUNG ZUR SCHÄTZUNG DES REIBUNGSKOEFFIZIENTEN VON STRASSENOBERFLÄCHEN
DISPOSITIF D'ESTIMATION DU COEFFICIENT DE FROTTEMENT D'UNE SURFACE DE ROUTE
2021-10-06
Patent
Electronic Resource
English
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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