An Automatic Emergency Brake Assist System Based on Active Suspension Control

Abstract

The invention discloses an automatic emergency braking assistance system based on active suspension control. In the braking warning stage, the front suspension of the active suspension is greatly lowered and the rear suspension of the active suspension is slightly lowered at the same time. This way, it simulates the forward tilting action of the vehicle during braking, which can reduce the impact of emergency braking on the driver; the early warning method of greatly lowering the front suspension and slightly lowering the rear suspension not only keeps the vehicle The forward tilting action of the brake reduces the center of gravity of the vehicle; in the enhanced braking stage, the active suspension system is controlled through the SMC slip film control algorithm and the PID algorithm, so that the vertical load on the front and rear axles is always as close as possible to the ideal value calculated by the optimization algorithm. The vertical load force maximizes the effect of ABS and makes full use of ground adhesion, so that the vehicle can achieve the maximum braking force and obtain the shortest braking distance during emergency braking, thus maximizing the safety of the driver, passengers and the vehicle. Safety.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to an automatic emergency braking auxiliary system based on active suspension control. Background technique [0002] Smart cars are emerging technologies under the background of a new round of scientific and technological revolution. They use modern sensing technology, information and communication technology, automatic control technology, computer technology, artificial intelligence and other technologies, and represent the strategic commanding heights of future automotive technology. The key to industrial transformation and upgrading is also the development direction recognized by the world. Smart cars have great potential in reducing traffic accidents, alleviating traffic congestion, and improving road and vehicle utilization. [0003] As an important technology in the intelligent driving system, emergency braking system (AEB) has received more and more attention and h...

AI Technical Summary

Problems solved by technology

However, this is not very consistent with the driver's subjective feeling of braking, and may interfere with the driver's judgment; in addition, relevant studies have shown that compared with hearing and vision-based assisted driving technologies, the use of force / tactile Passing information to the driver can provide more effective and less intrusive assistance to the driver, so it is considered an optimal way in many in-vehicle applications

[0006] In addition, the current AEB system does not fully consider the effective combination with the early warning stage in the process of braking force enhancement. The axial load force, combined with the auxiliary brake anti-lock braking system (ABS), makes the slip rate of the tire close to the optimal value during the braking process, so as to achieve the effect of making full use of the road surface adhesion coefficient to shorten the braking distance, but these methods are not It is based on the cooperative control during the braking process, and does not fully consider the effective combination of the early warning stage and the braking enhancement stage

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