Lane Keep Assist Control Using Rate of Departure
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Solution Overview
Problem
Conventional lane keep assist systems are complex and reliant on proprietary hardware and communication protocols, making them difficult to adapt for use across different vehicles, and they do not effectively account for dynamic vehicle behavior.
Innovation Solution
A system and method that control the amount of assistance based on the rate of change in the distance between the vehicle and a lane marker, using a lane keep assist controller to generate power steering system control signals responsive to this rate of change, allowing for reliable lane maintenance without proprietary hardware or communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lane keep assist systems use proprietary hardware and communication protocols, then system reliability is improved, but device complexity and adaptability worsen
Solution Approach 1:
The patent applies universality by implementing a lane keep assist system that functions across multiple vehicle types without requiring proprietary hardware. The system uses standard camera components and processing algorithms that can be universally applied to different vehicles, eliminating the need for vehicle-specific implementations while maintaining reliable lane detection and steering assistance functionality
2Reliability
If conventional lane keep assist systems use proprietary hardware and communication protocols, then system reliability is improved, but adaptability worsens
Solution Approach 1:
The system achieves adaptability through universality by designing a lane keep assist solution that can be implemented across different vehicle platforms using standard camera hardware and processing algorithms. The method adapts to various vehicle types without requiring proprietary components, allowing the same system architecture to serve multiple vehicle applications reliably
3Device complexity
If lane keep assist systems do not account for dynamic vehicle behavior, then device complexity is reduced, but measurement precision worsens
Solution Approach 1:
The patent applies dynamics by incorporating rate of change calculations that account for dynamic vehicle behavior. The system calculates not only the distance to lane markers but also the rate at which this distance is changing, allowing the steering assistance to adapt to dynamic conditions such as vehicle speed changes and lateral movements. This dynamic approach improves measurement precision without significantly increasing device complexity
Data Source
AI summary
A lane keep assist system for a vehicle includes a controller that receives first and second signals including values for a distance from a point on the vehicle to an edge of a lane marker for the vehicle's lane of travel at first and second times. The controller determines a rate of change in the distance responsive to the first and second signals and generates a power steering system control signal responsive to the rate of change. The control signal generates a force on a steering gear of the vehicle connected to one or more steerable wheels on the vehicle to control the position of the vehicle relative to the lane of travel with the amount of the force responsive to the rate of change.