Backup Assistance Reverse Path Control Under Error Thresholds
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Solution Overview
Problem
Existing backup assistance systems for vehicles struggle to accurately determine the maximum distance for reverse travel along a previously traveled trajectory without exceeding a predefined error threshold, which can lead to deviations and potential collisions, especially in complex environments.
Innovation Solution
A method and system that utilize a control unit to determine and output the maximum distance for reverse travel based on expected errors from sensor system measurements, vehicle odometry, actuator errors, and storage errors, allowing for partial or automated reverse travel within a safe deviation limit, and provide user feedback through displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the backup assistance system automatically executes reverse travel along a previously traveled trajectory, then the ease of operation is improved, but the measurement precision deteriorates due to sensor system measurement errors and vehicle odometry errors causing deviation from the original trajectory
Solution Approach 1:
The system determines the maximum distance for reverse travel before actually executing the reverse maneuver. By calculating the maximum distance based on expected errors in advance, the system ensures that the reverse travel will not exceed acceptable deviation thresholds, thus maintaining trajectory accuracy while enabling automatic operation.
Solution Approach 2:
The system uses sensor systems to continuously monitor the actual position during reverse travel and compares it with the stored reference trajectory. This feedback mechanism allows the system to detect deviations and adjust or terminate the reverse travel if the maximum distance or error threshold is approached, thereby maintaining measurement precision.
2Productivity
If the maximum distance for reverse travel is extended to cover longer trajectories, then the productivity is improved, but the reliability deteriorates due to accumulated errors exceeding the predefined error threshold
Solution Approach 1:
The system calculates the maximum distance for reverse travel before execution by considering expected errors from sensor systems and vehicle odometry. This preliminary calculation ensures that even for longer trajectories, the accumulated errors will not exceed the predefined error threshold, maintaining reliability while enabling extended reverse travel coverage.
Solution Approach 2:
The maximum distance is not fixed but dynamically determined based on the specific trajectory characteristics, sensor system performance, and expected error accumulation. This dynamic adjustment allows the system to optimize reverse travel distance for each scenario, balancing productivity and reliability.
Data Source
AI summary
Technologies and techniques for operating a backup assistance system for a vehicle, wherein the backup assistance system enables travel in reverse along a previously travelled trajectory, wherein a maximum distance for the reverse travel along the previously travelled trajectory is determined and output using a control unit on the basis of an expected error for the reverse travel along the previously travelled trajectory, in which the expected error exceeds a predefined error threshold value.