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Automotive Engineering ›› 2024, Vol. 46 ›› Issue (10): 1842-1852.doi: 10.19562/j.chinasae.qcgc.2024.10.011

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Research on the Estimation Method of Road Friction Coefficient Ahead Based on Point Cloud Reflection Properties

Hongyu Hu,Minghong Tang,Fei Gao,Mingxi Bao,Zhenhai Gao   

  1. Jilin University,National Key Laboratory of Automotive Chassis Integration and Bionics,Changchun 130022
  • Received:2024-05-11 Revised:2024-06-24 Online:2024-10-25 Published:2024-10-21
  • Contact: Zhenhai Gao

Abstract:

The road friction coefficient is a significant factor that impacts the decision-making control strategy of the autonomous driving system. To achieve prospective and high-precision perception of the road friction coefficient, a novel estimation method for road friction coefficient based on the LiDAR equipped in vehicles is proposed in this paper. Firstly, a road dataset is constructed by collecting data from dry asphalt, concrete, wet asphalt, icy, and snowy road surface. Then, road point cloud is extracted using cloth simulation filtering and RANSAC algorithms, and abnormal noise points are removed based on Gaussian filtering. The road surface is divided into different regions according to the variation of point cloud reflectivity with distance and incident angle, and features are extracted accordingly. A road recognition model is constructed based on the deep neural network and trained by the collected dataset. Finally, the friction coefficient of the road ahead is determined based on the statistical experience of road material and peak friction coefficient. The test results show that the proposed algorithm achieves road type recognition accuracy of over 99.3%, with an average running cycle of 55ms, enabling real-time and high-precision estimation of the road peak friction coefficient.

Key words: road friction coefficient, LiDAR point cloud, cloth simulation filtering, RANSAC, deep neural network, Gaussian filtering, road type recognition