Abstract
In this paper, a test method of the forward collision warning (FCW) function is proposed and the forward collision risk factor is defined. Firstly, the concept of the minimum alarm distance is given according to the road scene and vehicle movement state, and then the calculation equation of the minimum alarm distance is derived by combining kinematics equation and driver's response time. We compare the actual vehicle distance and the minimum alarm distance to determine whether the FCW test is successful. The actual vehicle distance and the minimum alarm distance are used as the parameters to derive the calculation method of the vehicle's FCW risk factor. Finally, the test scenario is deployed in simulation software, and multiple test cases of FCW are established. By observing the simulation process and analyzing the experimental data, we found that the motion rule of the tested vehicle conforms to our theoretical analysis, and the experimental result is similar to the predicted result, so the conclusion is drawn: The FCW test method based on minimum alarm distance has confidence. At the same time, we conduct a comparative experiment on the hazard factor. The hazard factor we propose is applicable to more automatic driving conditions, and can be continuously output in the test process, which is more conducive to analysis.
Highlights
A forward collision warning system is a mature vehicle warning system
We have completed the following work: (1) we propose the concept of minimum alarm distance for forward collision warning (FCW); (2) we proposed the test method of FCW according to the minimum alarm distance; (3) we give the concept of FCW risk factor and conduct a comparative experiment with the existing coefficient –the coefficient we proposed has more advantages; (4) we set up test scenarios, created test cases and conducted FCW tests in the simulation environment to verify our theory; This paper analyzes and discusses the FCW function test
RISK FACTOR Based on alarm distance and actual distance, we propose a method for grading the risk of FCW
Summary
A forward collision warning system is a mature vehicle warning system. It is reported that a forward anti-collision system may prevent or reduce 70% of rear-end collisions and 20% of collision accidents [1]. In HLDI’s study, FCW reduced the liability claim rate for property damage caused by traffic accidents by 7%-22%, including losses caused by negligent vehicles to other vehicles and property. The rate of personal injury liability claim is reduced by 4-25%, which includes medical expenses incurred by malperforming vehicles for injuries to other drivers or passers-by [2]. It can be seen that the probability of rear-end collision of vehicles equipped with an FCW system is lower, and the loss caused by the accident is smaller.
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