Journal of Jilin University(Engineering and Technology Edition) ›› 2026, Vol. 56 ›› Issue (2): 575-584.doi: 10.13229/j.cnki.jdxbgxb.20240842

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Allocating control authority based on driving risk and driver's ability

Kun-chen LI1(),Wei YUAN1,2(),Chang WANG1,2,Hui-ming ZHANG1,Yu-wei MU1   

  1. 1.School of Automobile,Chang'an University,Xi'an 710086
    2.Key Laboratory of Transportation Industry of Automotive Transportation Safety Enhancement Technology,Xi'an 710086,China
  • Received:2024-07-25 Online:2026-02-01 Published:2026-03-17
  • Contact: Wei YUAN E-mail:likunchen@chd.edu.cn;yuanwei@chd.edu.cn

Abstract:

In order to reduce the conflict between vehicle and driver in the human-machine collaboration mode and to realize the flexible transition of control authority. Firstly, a simulated car-following experiment was carried out, and a driving risk assessment model was established based on time to collision (TTC), time to line crossing (TLC), and time to brake (TTB). Secondly, a predictive model of driver ability loss was developed using random forest regression (RFR) based on longitudinal acceleration and steering wheel angle. Finally, a control authority allocation strategy was formulated based on the boundary thresholds of driving risk and driver ability loss. The results show that in longitudinal collision events and near-collision events, the model suggests that the moment when the vehicle should intervene is 0.62 seconds and 1.03 seconds earlier than the driver steps on the brake pedal, respectively, with an effective recognition rate of 87%. The study can provide some theoretical assistance for the design of control allocation and transition between the vehicle and the driver in the human-machine collaborative driving.

Key words: transportation systems engineering, human-machine collaboration, driving risk, driver's ability, random forest

CLC Number: 

  • U491.2

Fig.1

Driving simulator"

Fig.2

Experimental procedure"

Fig.3

Research framework"

Table 1

Model input variables and predictor variables"

预测变量输入变量
加速度aideal

纵向速度/(m·s-1

前车速度/(m·s-1

相对速度/(m·s-1

跟车距离/m

TTC/s

TTB/s

前车加速度/(m·s-2

转向角sideal

横向距离/m

距离车道中心线距离/m

跟车距离/m

Fig.4

Learning curve for RFR"

Table 2

Optimal training parameters for the RFR"

参数加速度aideal转向角sideal
n_estimates100120
max_depth4030
criterionMSEMSE
R20.930.86

Fig.5

Matrix for the distribution of driving areas and vehicle control in two-dimensional space (ALm=1.57,DRm=1.80)"

Fig.6

Fitted surfaces for vehicle control authority"

Table 3

Offline validation results"

描述纵向碰撞临近纵向碰撞车道偏离
事件次数/次473527
干预次数/次413116
遗漏次数/次6411
平均tadvance/s0.59**1.03**0.66
有效率/%87.288.659.3

Fig.7

Results of the control authority allocation model (longitudinal collision risk)"

Fig.8

Results of the control authority allocation model (lane departure risk)"

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