Vehicle active collision avoidance mode switching method

Abstract

The invention discloses a vehicle active collision avoidance mode switching method, and belongs to the technical field of driving safety. The vehicle active collision avoidance mode switching method comprises the following steps of: step 1: obtaining the driving information of a vehicle; step 2: analyzing the driving information of the vehicle, and establishing and calculating a longitudinal collision avoidance safety distance of the vehicle to obtain a collision avoidance warning distance Dw and a forced braking distance Db; step 3: determining whether to provide a collision avoidance warning or perform active collision avoidance by comparing a relative distance between the vehicle and a target vehicle to the collision avoidance warning distance and the forced braking distance; step 4: when the active collision avoidance is needed, performing an active collision avoidance mode switching judgment; and step 5: completing collision avoidance under the control of an electronic control unit so as to complete the action to be performed in the step 4, and feeding back the vehicle state information to a driving information acquisition control unit. Through the adoption of the vehicle active collision avoidance mode switching method disclosed by the invention, the vehicle can avoid a dangerous collision condition timely in the traveling process, and the safety factor of driving is improved significantly; and through the adoption of a horizontal safety distance model and the collision avoidance mode switching method provided by the invention, the active collision avoidance of the vehicle can be realized accurately.

Description

technical field [0001] The invention relates to a mode switching method of a vehicle active collision avoidance system, belonging to the technical field of driving safety. Background technique [0002] With the continuous improvement of the public's demand for motor travel, the potential of the automobile market continues to be released, and the number of automobiles maintains a rapid growth trend. There are 342 million people, including 296 million car drivers, which poses a huge challenge to road traffic pressure and road traffic safety. The development of advanced vehicle active safety systems is an urgent need for modern road traffic. The important link in the vehicle active safety system is the research and development of the vehicle's active collision avoidance system. Vehicle active collision avoidance systems mainly include longitudinal active collision avoidance systems and lateral active collision avoidance systems. The longitudinal active collision avoidance con...

AI Technical Summary

Problems solved by technology

However, due to the variability of the external environment and the complexity of the vehicle structure, the braking safety distance of the longitudinal active collision avoidance system is greater than the actual distance between the two vehicles, resulting in the danger of insufficient braking distance. At this time, it is necessary to use the steering actuator as the control object. Lateral active collision avoidance system to perform collision avoidance maneuvers

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