Vehicle Steering Mode Switching for Multi-Period Abnormality Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle steering control devices determine abnormalities based solely on steering angle and a single threshold value, leading to low reliability in detection.
Innovation Solution
A vehicle control device that generates a target trajectory and determines changes in steering angle speed over different periods to adjust driving modes, using multiple threshold values that adapt based on vehicle speed and direction, thereby enhancing the reliability of abnormality detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single threshold value is used to determine steering abnormality, then the device complexity is reduced, but the reliability of abnormality detection deteriorates
Solution Approach 1:
The single threshold value is segmented into multiple threshold values corresponding to different time periods (first period with first threshold value, second period with second threshold value). This segmentation allows the system to evaluate steering angle changes at different time scales, improving detection reliability without significantly increasing system complexity.
Solution Approach 2:
The threshold values are made dynamic by associating them with different time periods. The first threshold value applies to the first period and the second threshold value applies to the second period, allowing the system to adapt its detection criteria based on the temporal characteristics of steering operations.
2Reliability
If multiple parameters and time periods are considered for steering abnormality detection, then the reliability of detection is improved, but the device complexity increases
Solution Approach 1:
The detection system is segmented into multiple evaluation stages corresponding to different time periods. Each period has its own threshold value and evaluation criteria, allowing comprehensive analysis without overwhelming system complexity. The segmented approach processes information in manageable chunks.
Solution Approach 2:
The system performs partial evaluations at different time periods rather than requiring all parameters to be simultaneously analyzed. The first period evaluation and second period evaluation can be conducted separately and combined, reducing the computational burden while maintaining comprehensive detection capability.
3Reliability
If the driving mode is changed based on steering abnormality detection, then the safety is improved, but the ease of operation deteriorates due to mode transitions
Solution Approach 1:
The driving mode is dynamically adjusted based on the results of multi-period steering angle change evaluations. When abnormality is detected through the multi-threshold evaluation, the system transitions to a more restrictive mode, providing safety while maintaining operational flexibility under normal conditions.
Solution Approach 2:
The system uses feedback from the steering angle change evaluations to determine mode transitions. The multi-threshold evaluation provides continuous feedback about steering behavior, allowing the system to adjust the driving mode based on actual operational needs rather than arbitrary transitions.
Data Source
AI summary
Provided is a vehicle control device configured to: generate a target trajectory of a vehicle; and determine whether change in speed of a target steering angle in a first period is equal to or larger than a first threshold value and whether change in speed of the target steering angle in a second period is equal to or larger than a second threshold value; and change, in a case where the driving mode of the vehicle is a second driving mode, the driving mode of the vehicle to a first driving mode when the change in speed of the target steering angle in the first period is determined to be equal to or larger than the first threshold value or when the change in speed of the target steering angle in the second period is determined to be equal to or larger than the second threshold value.