Rumble Strip Engagement Control for Roadway Departure Prevention
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Solution Overview
Problem
Current vehicle control systems relying on audible warnings from rumble strips are insufficient to alert drowsy or incapacitated drivers, as they may not respond to the warnings, leading to potential roadway departures and collisions.
Innovation Solution
A vehicle controlling system that detects tire engagement with rumble strips and performs first and second vehicle controls to bring the tire back into engagement and maintain it, using a controller to manage steering and braking systems, ensuring continuous engagement through pulse control and sliding mode control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audible warnings from rumble strips are used to alert drivers, then drivers can be warned of roadway departure, but drowsy or incapacitated drivers may not respond to the warnings
Solution Approach 1:
The patent introduces an automated vehicle control system as an intermediary between the rumble strip warning and the driver. When the system detects tire disengagement from the rumble strip, it automatically executes corrective steering actions to bring the vehicle back onto the road, eliminating the need for driver response and thus resolving the contradiction between warning reliability and driver response capability
Solution Approach 2:
The vehicle control system performs self-correction by automatically detecting roadway departure through rumble strip engagement status and executing corrective maneuvers without driver intervention. This self-service capability ensures roadway departure prevention even when the driver is drowsy or incapacitated, resolving the effectiveness gap in traditional warning systems
2Reliability
If automated vehicle control is implemented to correct trajectory, then roadway departure is prevented, but system complexity increases
Solution Approach 1:
The patent leverages existing multi-functional vehicle systems (steering control, sensor integration, communication systems) to perform roadway departure prevention. By utilizing components already present in modern vehicles for multiple purposes, the system achieves reliable automated correction without proportionally increasing overall system complexity
Solution Approach 2:
The system continuously monitors rumble strip engagement status and vehicle position, using this feedback to automatically adjust steering control. This closed-loop feedback mechanism enables reliable roadway departure prevention through simple conditional logic rather than complex algorithms, maintaining system simplicity while ensuring safety
Data Source
AI summary
A vehicle controlling method which includes detecting an engagement of a vehicle tire with a rumble strip of a road, and performing first and second vehicle controls. The first vehicle control includes operating a controller to control movement of the vehicle after the vehicle tire has disengaged from the rumble strip to bring the vehicle tire back into engagement with the rumble strip. The second vehicle control includes operating the controller to continue to control movement of the vehicle to maintain the vehicle tire in engagement with the rumble strip after the vehicle tire has been brought back into engagement with the rumble strip.