Emergency braking control system adapted to vehicle driving state

Abstract

The invention discloses an emergency braking control system adapted to the vehicle driving state. The system comprises a vehicle speed sensor, a ranging radar, an AEB controller and a braking master cylinder controller, the ranging radar is used for detecting the vehicle distance between a vehicle and a front vehicle and the vehicle speed of the front vehicle in real time, the vehicle speed sensor is used for detecting the real-time vehicle speed of the vehicle, the AEB controller calculates collision occurrence time ttc according to data collected by the ranging radar and the vehicle speed sensor, and enables the brake master cylinder controller to control the whole emergency brake according to a three-level brake control method. According to the threshold value calculation method in the system, the ttc threshold value and the braking force can be dynamically adjusted according to the vehicle speed value in the vehicle braking stage, so that the sensitivity of the ABE system is improved when the vehicle is in a high-speed state or a front vehicle is in a sudden deceleration state, and high safety is achieved; and the sensitivity of the AEB is reduced in a low-speed state or a slow-speed state of the front vehicle, so that the intervention opportunity of the system is reduced on the premise of improving the safety, and the influence on the driving comfort of the vehicle is reduced.

Description

technical field [0001] The invention relates to the technical field of safe driving, in particular to an emergency braking control system adaptive to the driving state of a vehicle. Background technique [0002] Automatic emergency braking (Autonomous Emergency Braking, AEB) technology realizes active emergency braking by automatically controlling the brakes to avoid vehicle collisions or reduce the impact of collisions. It is one of the important means to improve vehicle driving safety. widely used. [0003] At present, the AEB technology mainly adopts the collision avoidance strategy based on the safe driving distance and the time to collision (Time to Collision, ttc). The ttc itself is the time allowance for a collision, which can intuitively reflect the urgency of the collision risk, but the safe driving distance is insufficient in evaluating the collision risk, including: [0004] (1) The road surface friction coefficient is one of the main factors affecting the braki...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides an adaptive emergency braking control system for vehicle driving conditions, which can solve the problems of low safety, robustness and applicability in the prior art

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