Active anti-collision system based on electric automobile and control method thereof

Abstract

The invention discloses an active anti-collision system based on an electric automobile and a control method thereof. The active anti-collision system comprises a man-machine interface unit, an information collecting unit, a central processing unit and an executing unit. An electronic control hydraulic brake technology is adopted in the system, a fusion algorithm is adopted to recognize the target according to laser radar and visual sensor signals, safety early-warning distance and safety brake distance are calculated based on road adhesion coefficients, and finally compound decision control execution unit is used for early-warning or active brake. The system is capable of greatly improving the reliability of automobile collision prevention and effectively promoting traveling safety.

Description

technical field [0001] The invention belongs to the field of vehicle active safety, and in particular relates to an electric vehicle-based active anti-collision system and a control method thereof. Background technique [0002] With the increase in car ownership, while promoting economic development, it has also brought us many social problems, such as air pollution and traffic accidents, especially frequent traffic accidents, which have brought serious economic losses and casualties . [0003] The active anti-collision system based on electric vehicles has become an important method to solve this problem, but the braking system used in the existing anti-collision system adopts the traditional pull-wire type or motor-driven type, which has a long response time and poor foot feel; In the application, the safety distance model does not consider the road surface changes, which leads to poor reliability of its anti-collision. These defects greatly damage the promotion of the an...

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Problems solved by technology

[0003] The active anti-collision system based on electric vehicles has become an important method to solve this problem, but the braking system used in the existing anti-collision system adopts the traditional pull-wire type or motor-driven type, which has a long response time and poor foot feel; In the application, the safety distance model does not consider the change of the road surface, which leads to poor reliability of its anti-collision. These defects greatly damage the promotion of the anti-collision system

[0004] In the published patent [CN106004671A], a vehicle anti-collision system and anti-collision method at an intersection are disclosed. Detection accuracy, but its cost is high, and there is no explanation for the fusion algorithm, brake system composition, control strategy, etc.; in the published patent [CN104276078A], a car anti-rear collision device based on the forward collision avoidance system is disclosed. The system adopts the time-to-collision TTC method. Although the calculation is simple, the accuracy of the model is not high, the road conditions are not considered, and the reliability is poor. In addition, it can only provide early warning but cannot achieve active braking.

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