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›› 2018, Vol. 40 ›› Issue (11): 1317-1323.doi: 10.19562/j.chinasae.qcgc.2018.011.010

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Unsupervised Clustering of Driving Styles Based on KL Divergence

Zhu Bing, Jiang Yuande, Deng Weiwen, Yang Shun, He Rui, Su Chen   

  1. Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130025
  • Received:2017-12-04 Online:2018-11-25 Published:2018-11-25

Abstract: In order to understand the driving style features of different drivers, an unsupervised clustering algorithm for the driving styles of drivers is proposed in this paper based on Kullback-Leibler (KL) divergence. Firstly an acquisition platform for the driving data of drivers in real vehicle test is built, and 84 drivers are tested. Then the driving data of each driver are regarded as a specific Gaussian mixture model (GMM), and whose parameters are estimated by using expectation maximization algorithm. Finally Monte Carlo algorithm is employed to estimate the KL divergence between GMMs, hence the quantitative description on the discrepancies of different drivers is obtained and drivers are clustered into different catagories of style. The results of statistical analysis on the driving data of drivers in each category after clustering show that the unsupervised clustering algorithm proposed can effectively achieve the clustereing of drivers with different driving styles

Key words: driving style, clustering, KL divergence, GMM, Monte Carlo algorithm