Lane Keeping Assist Virtual Route Generation
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Solution Overview
Problem
Conventional Lane Keeping Assist Systems (LKAS) face challenges in maintaining vehicle safety when lane recognition fails or deteriorates, leading to potential collisions due to uncontrolled preceding vehicle follower longitudinal control during lane changes, especially in situations like crossroads or crosswalks.
Innovation Solution
The system employs a lane and preceding vehicle recognition module, route generation module, and electronic power steering to generate a virtual lane and restrict preceding vehicle follower longitudinal control range by deactivating control when the preceding vehicle deviates from the virtual route, ensuring safe navigation even in lane disappearance sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LKAS activates preceding vehicle follower longitudinal control when lane recognition fails or deteriorates, then the system maintains operational continuity and can still control vehicle speed, but the system may allow unintended longitudinal control when the preceding vehicle performs lane change, leading to potential collision with peripheral vehicles
Solution Approach 1:
The system dynamically adjusts the operational state of preceding vehicle follower longitudinal control based on lane recognition conditions. When lane recognition succeeds, the system allows normal operation; when lane recognition fails or deteriorates, the system transitions to a restricted state where longitudinal control is limited or deactivated, preventing harmful actions while maintaining system operational continuity in safe conditions
Solution Approach 2:
The system continuously monitors lane recognition performance and uses this feedback to determine whether to activate or restrict preceding vehicle follower longitudinal control. The feedback loop detects lane recognition failure or deterioration and automatically adjusts the control state accordingly, enabling the system to respond adaptively to changing recognition conditions and avoid unintended longitudinal control during lane changes
2Measurement precision
If the LKAS performs lane keeping control through recognition of lane and preceding vehicle, then the system provides accurate lane following and speed control, but the system cannot operate safely in situations where lane markings are temporarily not present such as crossroads or crosswalks
Solution Approach 1:
The system performs preliminary assessment of lane recognition conditions before activating preceding vehicle follower longitudinal control. By evaluating the reliability of lane markings in advance, the system prevents activation in unsuitable conditions such as crossroads or crosswalks where lane markings may be temporarily absent, thereby avoiding unintended longitudinal control while maintaining accurate lane following when conditions are favorable
Solution Approach 2:
The system changes the operational parameters of preceding vehicle follower longitudinal control based on lane recognition conditions. When lane markings are not present or recognition deteriorates, the system modifies control parameters by deactivating or restricting longitudinal control, allowing the system to adapt to different operational environments and maintain safety in situations where precise lane following cannot be ensured
Data Source
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AI summary
A lane keeping assist system and method for increasing safety in preceding vehicle follower longitudinal control are disclosed. The lane keeping assist system for performing lane keeping using information about a lane and peripheral vehicle includes an image sensor configured to detect a forward lane and a preceding vehicle with respect to a host vehicle, and an electronic control unit (ECU) configured to control a traveling direction of the host vehicle in a manner that the host vehicle follows a traveling route within the detected lane, perform a preceding vehicle follower control to control the traveling direction of the host vehicle in a manner that the host vehicle follows the preceding vehicle if the lane is not detected, and restrict a follower longitudinal control if the preceding vehicle deviates from an expected path of travel. Thus, the ECU controls a vehicle to safely enter an entrance of a highway service station nearest to a current highway in which the vehicle is traveling, resulting in greater driver convenience.