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A method and system for adaptive follow-up cruise control

A cruise control and self-adaptive technology, applied in control devices, external condition input parameters, vehicle components, etc., can solve problems such as reducing driving speed and affecting driving safety and driving comfort

Active Publication Date: 2019-05-07
WUHU LION AUTOMOTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an adaptive follow-up cruise control method, which aims to solve the problem that most of the existing adaptive cruise control systems use a linear control method to reduce the driving speed by uniform deceleration. When the speed drops to the target speed, The vehicle suddenly changes from uniform deceleration to constant speed driving. Due to the inertia, it will affect the driving safety and driving comfort.

Method used

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  • A method and system for adaptive follow-up cruise control
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Experimental program
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Embodiment 3

[0048] Embodiment three is on the basis of embodiment one or embodiment two, when the real-time distance D H Less than the safety distance D S When, step S32 also includes:

[0049] S321. Judging the real-time distance D H Is it less than the warning distance D W ;

[0050] In the embodiment of the present invention, the warning distance D W Less than the safety distance D H , the warning distance is set by the driver.

[0051] S322. If the judgment result is yes, warn the driver whether to enter the manual driving mode, if the judgment result is no, control the smart car to decelerate, and the acceleration value corresponding to deceleration travel is relative to the absolute value of the distance between vehicles |M| proportional to the size.

[0052] In the embodiment of the present invention, when the real-time distance is less than the set safety distance, the driver is warned whether to switch to the manual driving mode, which adds a guarantee for driving safety. ...

Embodiment 4

[0053] Embodiment 4 is based on Embodiment 3, if the driver does not choose to enter the manual driving mode, step S322 also includes:

[0054] S3221. Judging the real-time vehicle distance D H Is it less than the collision avoidance distance D B ;

[0055] In the embodiment of the present invention, the collision avoidance distance D B Less than the warning distance D W .

[0056] S3222. If the judgment result is yes, then control the smart vehicle to decelerate with the maximum deceleration, if the judgment result is no, then control the smart car to decelerate, the corresponding acceleration value and the absolute value of the relative vehicle distance ratio |M| proportional to the size.

[0057] In the embodiment of the present invention, when the real-time vehicle distance is less than the warning vehicle distance, active control is realized, and the maximum deceleration of the intelligent vehicle is used to decelerate, so as to widen the vehicle distance between the...

Embodiment 5

[0058] Embodiment 5 is based on Embodiment 1, and also includes before step S1:

[0059] S6. According to the distance between the intelligent vehicle acquired by the on-board sensor and the vehicle in front of the intelligent vehicle lane, it is judged whether there is a target vehicle within the set distance ahead of the lane where the intelligent vehicle is located;

[0060] S7. If the judgment result is no, control the intelligent vehicle to travel at a set speed, and if the judgment result is yes, execute step S1.

[0061] In the embodiment of the present invention, the vehicle-mounted sensor obtains the distance between the smart vehicle and the vehicle in front of the smart vehicle lane, and judges whether there is a vehicle within the set distance. If there is a vehicle, it is the target vehicle, and adaptive follow-up is performed. Cruise control, if there is a vehicle beyond the set distance, the vehicle is not the target vehicle followed by the intelligent vehicle, ...

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Abstract

The invention belongs to the technical field of unmanned driving and provides a self-adaptive following cruise control method and system. The method comprises the following steps that driving parameters sent by a vehicle-mounted sensor are received; according to safe driving parameters and the driving parameters, a relative parameter ratio M is calculated; the relative parameter ratio is used for representing a difference value of deviation of the driving parameters from the safe driving parameters; and based on relative ratio parameters, the driving parameters of an intelligent vehicle are adjusted to reduce the difference value of the driving parameters and the safe driving parameters. The embodiment of the invention controls the driving speed based on the relative parameter ratio, when the driving parameters are closer to the safe driving parameters, the relative parameter ratio is smaller, the corresponding acceleration magnitude is smaller, and until the acceleration becomes 0, uniform velocity driving is achieved. The driving safety hidden trouble and driving discomfort which are caused by the situation that uniform deceleration driving goes directly into uniform velocity driving are avoided.

Description

technical field [0001] The invention belongs to the technical field of unmanned driving, and in particular relates to an adaptive follow-up cruise control method and system. Background technique [0002] The adaptive cruise control system is an intelligent automatic control system, which is developed on the basis of the existing cruise control technology. When the vehicle is running, the vehicle distance sensor (radar) installed in the front of the vehicle continuously scans the road ahead of the vehicle, and the wheel speed sensor collects the vehicle speed signal at the same time. The dynamic anti-lock braking system and the engine control system coordinate actions to properly brake the wheels and reduce the output power of the engine so that the vehicle always maintains a safe distance from the vehicle in front. [0003] Most of the existing adaptive cruise control systems adopt a linear control method, that is, when the distance between the vehicle in front and the vehi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/165B60W40/105
CPCB60W30/162B60W30/165B60W40/105B60W2554/801B60W2554/804B60W2720/10B60W2754/30
Inventor 邓书朝曾庆喜方啸江涛张茂胜段山保
Owner WUHU LION AUTOMOTIVE TECH CO LTD