Chassis Geometry Asymmetry Detection for Safe Assisted Lane Changes
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Solution Overview
Problem
Existing methods fail to reliably detect and compensate for chassis geometry asymmetries in motor vehicles, leading to undesirable driving behavior, increased wear, and reduced performance of vehicle assistance systems.
Innovation Solution
A method that analyzes steering information and movement curves to determine warping, comparing actual and target movement curves to detect asymmetries, and triggers adaptive actions based on the severity of warping, including adjusting lane change times and deactivating driver assistance systems when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle continues operation without detecting chassis geometry asymmetry, then productivity is maintained, but reliability deteriorates due to unsafe driving behavior and increased wear
Solution Approach 1:
The system performs preliminary detection of chassis geometry asymmetry by analyzing steering information and movement curves before the asymmetry causes severe safety issues. The method compares actual movement curves with target movement curves in advance to identify deviations, allowing the vehicle to take preventive actions (such as adjusting driving parameters or alerting the driver) before reliability is compromised
Solution Approach 2:
The system continuously monitors steering information and movement curves, compares actual performance with expected performance, and provides feedback when asymmetry is detected. This closed-loop feedback mechanism allows the vehicle to maintain reliable operation by detecting deviations early and triggering appropriate responses, balancing safety with operational continuity
2Reliability
If the vehicle deactivates driver assistance systems upon detecting asymmetry, then reliability is improved by preventing unsafe operations, but ease of operation deteriorates due to loss of assistance functions
Solution Approach 1:
The system dynamically adjusts the operational status of driver assistance systems based on the detected level of chassis geometry asymmetry. Rather than a static on/off approach, the system can adaptively modify assistance levels, adjust lane change parameters, or selectively deactivate specific functions based on real-time asymmetry measurements, maintaining ease of operation within safe parameters
3Productivity
If the vehicle systematically carries out automated lane changes without detecting asymmetry, then productivity is maintained, but reliability deteriorates due to lane change aborts and unsafe behavior
Solution Approach 1:
The system performs preliminary detection of chassis geometry asymmetry before executing automated lane changes. By analyzing steering information and movement curves in advance, the system identifies potential safety issues that would affect lane change execution, allowing it to prevent unsafe lane changes before they occur
Solution Approach 2:
The system continuously monitors vehicle movement during automated lane changes and compares actual trajectories with expected trajectories. When asymmetry is detected that would compromise lane change safety, the system provides feedback to adjust or abort the lane change maneuver, ensuring reliable execution while maintaining productivity
Data Source
Figure 1~3
AI summary
The invention relates to two methods for detecting an asymmetry in the chassis geometry of a motor vehicle and a method for operating a motor vehicle. In the first method for detecting the asymmetry of the chassis geometry, steering information, which characterizes the steering of the motor vehicle, is analyzed together with a determined motion curve of the motor vehicle with regard to any distortion of the motor vehicle. Upon detection of distortion, the asymmetry of the chassis geometry is determined, and an action of the motor vehicle is triggered, wherein the action is selected depending on a determined degree of distortion.