Vehicle Travel Direction Stabilization System
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Solution Overview
Problem
Existing vehicle dynamics controllers often fail to restore a vehicle's original direction of travel after an unexpected event like a collision, leading to potential secondary accidents as the vehicle may continue on a rotated course due to driver inaction or shock, increasing the risk of leaving the roadway.
Innovation Solution
A method and device that monitor vehicle status post-event, automatically rotating the vehicle back by the relative yaw angle it deviated due to the collision, using the brake system, steering system, or active differential, to align the vehicle's direction with the roadway, while ignoring the post-event steering wheel angle and deactivating assistance once the original direction is restored.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the vehicle dynamics controller stabilizes the vehicle based on steering wheel position after a collision, then the vehicle is stabilized, but the travel direction deviates from the original direction
Solution Approach 1:
The system stores the original travel direction before the collision occurs. When a collision is detected, this pre-stored direction information is used as the reference for correction, allowing the vehicle to return to its original path rather than following the driver's post-collision steering input.
Solution Approach 2:
The system continuously monitors the actual travel direction and compares it with the stored original direction. When a deviation is detected after collision, the controller provides feedback by applying corrective yaw moments to rotate the vehicle back to the original direction, creating a closed-loop control system.
2Ease of operation
If the driver does not change steering wheel position after collision, then the driver's input is maintained, but the vehicle continues on a rotated course
Solution Approach 1:
The system automatically detects the collision and independently executes the direction correction without requiring driver action. The controller autonomously determines the necessary yaw angle correction and applies appropriate braking forces to realign the vehicle with the original travel direction.
Solution Approach 2:
The system anticipates the potential hazard of continued deviation and proactively applies corrective yaw moments immediately after collision detection. This preliminary counter-action prevents the vehicle from following the rotated course that would result from the driver's unchanged steering input.
3Stability of the object's composition
If the vehicle dynamics controller intervenes to stabilize the vehicle, then the yaw movement is reduced, but the vehicle leaves the roadway
Solution Approach 1:
The system uses feedback from direction sensors to continuously monitor whether the vehicle is returning to the original travel path. The corrective yaw moments are adjusted based on the measured deviation, ensuring the vehicle realigns with the roadway rather than simply stabilizing in a rotated position.
Solution Approach 2:
By pre-storing the original travel direction before collision, the system has a reference target for correction. This allows the controller to guide the vehicle back to the specific original direction that corresponds to the roadway alignment, preventing roadway departure.
Data Source
AI summary
A method for influencing the direction of travel of a vehicle. In order to lower the risk of accidents in driving situations in which the driver reacts incorrectly, for example because of being surprised, it is provided that the driving operation be monitored in reference to the occurrence of an event due to which the travel direction of the vehicle changes, deviating from the travel direction specified at the steering wheel, and when such an event is detected that an automatic intervention in the driving operation be performed whereby the vehicle is moved back approximately into the original direction of travel in which it was moving before the event occurred.