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 small, the vehicle in front suddenly cuts in and out at a short distance, and the braking deceleration will not be smooth and continuous, which will affect the driver's ride quality. comfort
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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 some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.
[0054] An embodiment of the present invention provides a method for controlling vehicle following distance, which can be applied to a vehicle controller. The method flow chart is as follows figure 1 shown, including the following steps:
[0055] S10, acquiring the environmental information for the vehicle in front, the acceleration value of the vehicle in front of the environment information, the relative speed value and the relative distance value with t...
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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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Login to View More IPC IPC(8): B60W30/165
CPCB60W30/165
Inventor 王斌许嵩方恩刘飞张栋林孙伟
Owner SAIC MOTOR