ARTICLE | doi:10.20944/preprints202208.0033.v1
Subject: Engineering, Automotive Engineering Keywords: road friction; environmental information; measurement; friction estimation
Online: 2 August 2022 (04:18:45 CEST)
This paper deals with the possibility for construction of the database on friction coefficient on the actual roads from the viewpoint of traffic safety. A measurement algorithm is determined in order to construct road friction measuring device. Next, the tires used for measurement are selected and the characteristics are measured using bench tire characteristic tester, and the measuring device is designed and constructed based on the characteristics. Finally, using this device, the measurement results of the road friction characteristics for two types of road surfaces are shown.
ARTICLE | doi:10.20944/preprints202111.0268.v1
Subject: Engineering, Automotive Engineering Keywords: Road Friction; Environmental Information; Measurement; Friction Estimation
Online: 15 November 2021 (14:35:48 CET)
This research deals with the possibility for construction of the database on the braking friction coefficient for actual roads from the viewpoint of traffic safety especially for automated driving such as level 4 or higher. In an automated driving such levels, the controller needs to control the vehicle, but the road surface condition, especially the road friction coefficient on wet roads, snowy or icy roads, changes greatly, and in some cases, changes by almost one order. Therefore, it is necessary for the controller to constantly collect environment information such as the road friction coefficients and prepare for emergencies such as obstacle avoidance. However, at present, the measurement of the road friction coefficients is not systemically performed, and a method for accurately measuring has not been established. In order to improve this situation, this study examines a method for continuously measurement for the road friction characteristics such as μ-s characteristics.