Design of Intelligent Speed Planning and Early Warning System for High Speed Curved Road

According to an official US survey, traffic accidents at corners in highway accidents are eight times higher than in other road conditions [1]. Therefore, the warning of speed planning for corners is extremely important. This paper proposes a high-speed cornering intelligent speed planning early warning system for commercial vehicles with high-speed cornering that is prone to rollover accidents. Starting from the source of the driving, the system gives a hint to the driver before the cornering, and the slow throttle uses the inertial force to avoid the danger of brake failure caused by excessive braking on the brakes. At the same time, it can ensure that the vehicle leaves the corner at a safe speed to prevent the risk of rollover. Based on the lateral rollover model of the vehicle, the system calculates the critical safe speed of the curve, and combines with the longitudinal dynamics model to obtain the distance position for the slow release throttle to slide. In this paper, Trucksim is used to build a motion simulation platform, and combined with MATLAB simulation, the simulation results show that the sliding distance increases with the increase of the initial velocity and decreases with the increase of the radius of the curve. At the same time, the use of the system greatly reduces the braking time and braking distance, and the fuel economy is improved by about 3%. The research in this paper provides an early warning method for cornering rollover prevention, which lays a good foundation for the future intelligent assisted driving.