Test Method and Risk Factor Definition of Forward Collision Warning System

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.