Dynamic Deactivation Threshold for Automated Driving Systems
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Solution Overview
Problem
Existing automated driving systems can be inadvertently deactivated by accidental driver inputs, leading to loss of system support for collision avoidance.
Innovation Solution
A method that adjusts a variable deactivation threshold based on the operation time of the automated driving function and the driver's responsiveness, ensuring that the system remains active unless a deliberate and significant driver intervention exceeds the threshold, which is set higher initially and decreases over time or with increasing driver attentiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed deactivation threshold is used, then the system can be easily deactivated by driver intervention, but accidental deactivations occur leading to loss of system support
Solution Approach 1:
The deactivation threshold is made dynamic rather than fixed. It varies based on the operational state of the automated driving function and the detected driver responsiveness. When the driver shows high responsiveness (e.g., active steering inputs, pedal operations), the threshold increases, making accidental deactivation less likely. When responsiveness is low, the threshold decreases, allowing easier deactivation when the driver is clearly engaged.
Solution Approach 2:
The system changes the parameter of the deactivation threshold based on measured driver responsiveness. By monitoring driver inputs and adjusting the threshold parameter dynamically, the system adapts to the driver's state, preventing accidental deactivation while maintaining ease of operation when appropriate.
2Reliability
If the deactivation threshold is set high, then accidental deactivation is prevented, but deliberate driver intervention may be delayed
Solution Approach 1:
The threshold dynamically adjusts based on driver responsiveness measurements. When the driver demonstrates readiness through steering or pedal inputs, the threshold increases to prevent accidental deactivation. When responsiveness is low, the threshold decreases to ensure timely takeover, thus balancing prevention of accidental deactivation with maintaining quick driver response capability.
Solution Approach 2:
The system continuously monitors driver responsiveness and uses this feedback to adjust the deactivation threshold in real-time. This closed-loop control ensures that the threshold is optimized based on actual driver state, preventing accidental deactivation while maintaining appropriate driver engagement and response time.
3Stability of the object's composition
If the deactivation threshold is variable based on operation time, then system stability is improved, but system complexity increases
Solution Approach 1:
The system implements a variable deactivation threshold that changes based on the operation time of the automated driving function and measured driver responsiveness. This parameter adaptation improves system stability by preventing premature deactivation while the system is still stabilizing, and by adapting to the driver's learned behavior over time.
Data Source
AI summary
A method for deactivating an automated driving function of a vehicle, in particular a highly automated or autonomous driving function, is provided. The driving function is deactivated when a driver of the vehicle carries out a steering intervention or pedal intervention with a strength exceeding a predeterminable deactivation threshold. The deactivation threshold is predetermined depending on an operation length of the driving function and/or depending on a responsiveness of the driver. In particular, the deactivation threshold is predetermined in such a manner that it is higher directly after an activation of the driving function than some time afterwards and/or it is higher with a low responsiveness of the driver than with a high responsiveness of the driver.