Vehicle Lane Control With Speed-Adaptive Marking Deviation Thresholds
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Solution Overview
Problem
Autonomous driving systems face challenges in maintaining appropriate control when a deviation occurs between camera and map road markings on only one side, leading to reduced driving performance and occupant discomfort.
Innovation Solution
A vehicle control system that adjusts the condition for determining deviations between road markings based on vehicle speed, using different thresholds for angle differences at varying speeds to ensure accurate and continuous autonomous driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed threshold is used for determining deviation between road markings, then the determination is simple, but autonomous driving cannot be continued appropriately when deviation occurs on only one side
Solution Approach 1:
The patent applies dynamics by making the deviation determination condition variable rather than fixed. Specifically, the threshold for determining deviation is changed according to vehicle speed, allowing the system to adapt to different driving scenarios. This resolves the contradiction by enabling continuous autonomous driving through speed-adaptive thresholds while avoiding excessive complexity.
Solution Approach 2:
The patent changes the parameter of deviation threshold based on vehicle speed. When speed is low, a larger deviation threshold is used, allowing continued autonomous driving even with deviations on one side. When speed is high, a smaller threshold is used for stricter determination. This parameter change strategy maintains reliability while managing system complexity.
2Measurement precision
If a strict deviation threshold is used, then determination accuracy is high, but autonomous driving is interrupted easily causing occupant discomfort
Solution Approach 1:
The patent changes the deviation threshold parameter based on vehicle speed to balance accuracy and smoothness. At low speeds, a larger threshold provides smoother operation by preventing unnecessary interruptions, while at high speeds, a smaller threshold maintains determination accuracy when it matters most for safety.
Solution Approach 2:
The system dynamically adjusts the deviation threshold according to real-time speed conditions, making the determination process adaptive rather than rigid. This dynamic approach ensures smooth autonomous driving experience while maintaining appropriate accuracy levels for different driving conditions.
3Productivity
If deviation determination is made easily, then system response is fast, but false positives occur reducing driving performance
Solution Approach 1:
The patent uses speed-dependent threshold parameters to balance fast response with reliable performance. The system maintains fast determination response by having clear threshold criteria, while avoiding false positives through speed-appropriate threshold selection that reflects actual risk levels at different speeds.
Data Source
AI summary
A vehicle control device includes a storage medium that stores computer-readable instructions, and a processor connected to the storage medium, in which the processor executes the computer-readable instructions to recognize a road marking present in a moving direction of a vehicle, determine whether the recognized road marking and a map road marking based on map information stored in a storage unit match each other and determine a deviation between the road marking and the map road marking matching each other, and perform traveling control of the vehicle, and the processor changes a condition for determining the deviation according to a speed of the vehicle.