Vehicle following distance control method and device

A technology of following distance and control method, which is applied in the field of vehicle assisted driving, and can solve the problems affecting the driver's comfort, the braking deceleration of the front car is not smooth and continuous, etc., to achieve the effect of solving the problem of not being smooth and continuous and improving ride comfort

Inactive Publication Date: 2020-07-31
SAIC MOTOR
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Problems solved by technology

[0004] The above-mentioned control strategy can guarantee comfort on high-speed roads with good road conditions. However, when the road conditions are congested or the lane curve is smal

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  • Vehicle following distance control method and device
  • Vehicle following distance control method and device
  • Vehicle following distance control method and device

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[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0054] The embodiment of the present invention provides a vehicle following distance control method. The method can be applied to a vehicle controller. The method flow chart is as follows: figure 1 As shown, including the following steps:

[0055] S10: Acquire environmental information for the preceding vehicle, the acceleration value of the preceding vehicle of the environmental information, the relative speed value and the relative distance valu...

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Abstract

The invention provides a vehicle following distance control method and device. By using a tracking coordinate system established based on a variable structure sliding mode control theory, a target area where the relative speed value and the relative distance value between a front vehicle and a current vehicle are located can be determined, then the optimal acceleration value is obtained by processing and calculating the acceleration value of the current vehicle according to the type of the target area, and thus a lower-layer controller controls a power system and/or a braking system to complete torque output according to the optimal acceleration value. By designing a system constant-speed area and a system buffer area, the problem that the braking deceleration is not smooth and continuousenough when a front vehicle is cut in and cut out at a short distance is solved, and the riding comfort is improved.

Description

technical field [0001] The present invention relates to the technical field of vehicle assisted driving, and more specifically, relates to a method and device for controlling vehicle following distance. Background technique [0002] Automobile adaptive cruise system is based on traditional constant speed cruise by adding sensors such as external radar or camera, and outputting acceleration or deceleration control commands to the vehicle execution system by obtaining environmental information, so as to free the driver's feet. [0003] With the existing adaptive cruise technology, when there is a vehicle in front whose speed is lower than the target speed set by the driver and whose relative distance is smaller than the safety distance set by the driver, the vehicle controller of the vehicle will immediately determine the deceleration request value , so that the vehicle reaches the same speed and safe distance as the vehicle in front; and when the vehicle in front gradually ac...

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Application Information

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IPC IPC(8): B60W30/165
CPCB60W30/165
Inventor 王斌许嵩方恩刘飞张栋林孙伟
Owner SAIC MOTOR
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