Curve vehicle speed control method and curve vehicle speed control system

Abstract

The invention relates to a curve vehicle speed control method and a curve vehicle speed control system, and belongs to the field of vehicle safety control. The method comprises the following steps: (1) acquiring the curvature values of a road or a lane of N points from the near to the distant along the heading direction of the vehicle and sequentially denoting as rho1, rho2,...,rhoN, wherein N ismore than or equal to 2; (2) comparing the curvature value and the set curvature value rho0, calculating the upper limit vehicle speed corresponding to at least one point positioned on the curve if indicating that the vehicle is positioned before turning, and calculating the upper limit vehicle speed corresponding to the at least one point near the vehicle on the curve if indicating that the vehicle is at the curve; and (3) acquiring the current vehicle speed of the vehicle, and braking or reminding if the current vehicle speed is more than the upper limit vehicle speed. The curve entering working condition can be identified early, more time is provided for speed reduction before the vehicle enters the curve, the upper limit vehicle speed can be adjusted timely according to the specific road condition of the curve, and foundation is laid for the vehicle to respond to the specific road condition of the curve in real time.

Description

technical field [0001] The invention relates to a curve speed control method and a curve speed control system, belonging to the field of vehicle safety control. Background technique [0002] With the improvement of domestic road conditions and the continuous improvement of people's demand for vehicles, vehicle safety, especially rollover safety, has become an important issue in the field of vehicle research; with the continuous development of vehicle sensors, effective perception signals are provided for vehicle motion state recognition. It plays an important role in the prevention of vehicle accidents. [0003] In the prior art, a method with the function of preventing vehicle rollover in curves has been disclosed. For example, the Chinese patent document "A System and Method for Anti-rollover of Vehicles in Curves" with the publication number CN103247185A, the vehicle's anti-rollover in curves The reminder method comprises the following steps: 1. collecting the current po...

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Problems solved by technology

[0004] Although the above-mentioned anti-rollover warning method for vehicle entering a curve can serve the purpose of reminding the driver to slow down when the vehicle enters the curve, the above-mentioned method relies on the calculation of the limit vehicle speed based on a road condition at a fixed distance in front of the vehicle, which is easy There are the following problems: 1. If the calculation is based on a road condition with a small fixed distance, the time for the driver to slow down when the vehicle enters a corner is too short, and the driver may have the disadvantage of not having time to slow down; 2. If the calculation is based on a road condition with a relatively large fixed distance, because the specific road conditions in the curve are complex and changeable, the matching between the speed limit calculated by the vehicle in the curve and the position speed described by the vehicle is poor, which is not conducive to the driver's timely Regulating the speed of the vehicle, there is still an inevitable risk of rollover

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