ROAD SURFACE CONDITION ESTIMATION DEVICE

A road surface condition estimation device includes a control circuit, an acquisition circuit and an estimation circuit. The control circuit is configured to control a driving device that is able to independently drive a plurality of wheels. The acquisition circuit is configured to acquire detection...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KATO, Kazuhiro, KAWASAKI, Hiroaki, MAEDA, Yusuke, NOMA, Hiroshi, NIWA, Eiji, OGAWA, Fumiharu
Format:	Patent
Sprache:	eng
Schlagworte:	CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PERFORMING OPERATIONS PHYSICS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT TESTING TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A road surface condition estimation device includes a control circuit, an acquisition circuit and an estimation circuit. The control circuit is configured to control a driving device that is able to independently drive a plurality of wheels. The acquisition circuit is configured to acquire detection results of a plurality of wheel speed sensors that detects rotation speeds of the plurality of wheels respectively. The estimation circuit is configured to calculate a slip ratio for each driving wheel, based on a detection result of a first wheel speed sensor and a detection result of a second wheel sensor. The estimation circuit is configured to estimate a friction coefficient for each region on a road surface that corresponds to the driving wheel, based on the slip ratio.