Driving Support Apparatus Threshold Adjustment for Reliability Degradation
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Solution Overview
Problem
Existing driving support apparatuses fail to smoothly transition from automated driving to manual driving when the reliability of the support system degrades, potentially leading to unsafe driving conditions.
Innovation Solution
A driving support apparatus comprising a driving support unit, a switching control unit, a reliability detection unit, and a threshold lowering unit, which detects reliability degradation and lowers the operational threshold to facilitate a smooth transition to manual driving by allowing the driver to take control with a relatively small operating force or operation amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the threshold for switching from automated to manual driving is kept high to maintain automated driving stability, then driving support reliability is maintained, but the system cannot respond quickly when reliability degrades
Solution Approach 1:
The threshold is made dynamic rather than fixed. The threshold lowering unit adjusts the threshold value based on the reliability detection results. When reliability degrades, the threshold is lowered automatically, enabling faster response. This dynamic adjustment resolves the contradiction by allowing the system to maintain high thresholds for stability during normal operation while switching to lower thresholds for rapid response when reliability issues arise.
Solution Approach 2:
The system changes the parameter (threshold value) based on the detected reliability state. By monitoring reliability metrics and adjusting the threshold parameter accordingly, the system can transition from a stable automated driving state to a responsive manual driving state when needed. This parameter change approach allows the system to optimize both reliability maintenance and rapid response capability.
2Speed
If the threshold is lowered to enable faster switching to manual driving, then response speed improves, but automated driving stability deteriorates
Solution Approach 1:
The threshold dynamically adapts to system conditions rather than remaining fixed. During stable automated driving, the threshold remains high to maintain stability. When reliability degradation is detected, the threshold lowers to enable rapid switching. This dynamic behavior resolves the contradiction by contextually adjusting the threshold to prioritize either stability or response speed based on current system state.
Solution Approach 2:
The system performs preliminary reliability assessment before switching is needed. By continuously monitoring reliability indicators and preparing to lower the threshold in advance when degradation signs appear, the system can transition smoothly and rapidly when actual switching becomes necessary, without compromising normal automated driving stability.
3Reliability
If special control is implemented for reliability-based switching, then safety improves, but system complexity increases
Solution Approach 1:
The reliability detection unit and threshold lowering unit are integrated into the existing driving support control system, allowing these components to serve multiple functions. The same control unit that manages normal automated driving also handles reliability monitoring and threshold adjustment, eliminating the need for completely separate special control systems and reducing overall complexity while maintaining safety.
Data Source
AI summary
A driving support apparatus includes a driving support unit, a switching control unit, a reliability detection unit, and a threshold lowering unit. The switching control unit ceases driving support by the driving support unit and switches a driving state from driving in which the driving support is performed to manual driving, according to input from an operation detection unit when operating force or an operation amount exceeds a threshold. The reliability detection unit detects degradation of reliability of the driving support by the driving support unit. The threshold lowering unit lowers the threshold when the reliability detection unit detects the degradation of the reliability.