Crosswind Compensation Method for Electric Steering Based on Image Sensor for Lane Keeping Assist System

Abstract

The invention proposes an electric steering crosswind compensation method based on an image sensor used in a lane keeping assist system. To perform crosswind compensation, it is first necessary to judge whether the vehicle is going straight. In addition to applying information related to steering angle and steering angular velocity, the present invention also obtains the curvature information of the road ahead from the image sensor of the lane keeping assist system, and the azimuth information and relative The lateral displacement information of the lane, and judge whether the vehicle is going straight according to the above information. In this way, after accurately and quickly judging whether the vehicle is going straight, the crosswind compensation is performed.

Description

technical field [0001] The invention relates to a vehicle system, in particular to the steering technology in the vehicle system, in particular to an electric steering crosswind compensation method based on an image sensor used in a lane keeping assist system. Background technique [0002] Korean Patent No. 10-2006-0069679 has made the technology related to the electric steering gear that reflects the driving characteristics of the driver a well-known technology. This kind of electric steering gear judges the frequency and magnitude of acceleration and deceleration by the root mean square value of the acceleration on the one hand, and judges the frequency and magnitude of the driver's emergency steering by the root mean square value of the steering angular velocity on the other hand. This operation function reflecting the driving characteristics can increase or decrease the steering assist power according to the driver's driving characteristics, thereby ensuring the stabilit...

AI Technical Summary

Problems solved by technology

However, the technology in this patent only considers the driving characteristics of the driver, such as Figure 1-A The vehicle is stressed by a side wind, as shown, or as Figure 1-B As shown, when the vehicle is driving on a sloping road surface, that is, when external factors have an effect on the driver's straight travel, this technical solution cannot compensate for the situation

Therefore, in the prior art scheme, in order to keep going straight, the driver needs to directly compensate for the external force, so he must apply a steering force in the direction opposite to the external force. Constantly exerting force, which causes the driver to experience steering fatigue

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