Driver Alertness-Based Takeover Control for Stable Automated Driving
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Solution Overview
Problem
The transition from high automated driving to low automated driving poses safety risks due to potential vehicle behavior instability if the driver's alertness level is low, leading to sudden or incorrect operations of the steering wheel and accelerator pedal.
Innovation Solution
A driving takeover control apparatus equipped with a driver operation device, a vehicle driving device, an alertness detecting device, a computation control device, and an output limiting device, which detects the driver's alertness level and limits the output of the vehicle driving device if the alertness is low, thereby preventing sudden vehicle behavior changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transition from high automated driving to low automated driving is implemented without output limitation, then the driver can take control quickly, but vehicle behavior instability occurs due to low driver alertness
Solution Approach 1:
The system performs preliminary detection of driver alertness level before the actual takeover occurs. The alertness detecting device measures the driver's alertness in advance, and based on this measurement, the output limiting device pre-configures appropriate output limitations to be applied during takeover, ensuring vehicle stability is maintained while preparing for smooth transition
Solution Approach 2:
The output limitation is not fixed but dynamically adjusted based on the detected alertness level. The computation control device determines the alertness level and accordingly adjusts the degree of output limitation applied by the output limiting device, creating a dynamic adaptation mechanism that balances stability and responsiveness based on real-time driver state
2Reliability
If output limitation is applied during driver takeover, then vehicle behavior stability is improved, but the driver's operational input is restricted
Solution Approach 1:
The system changes the parameter of output limitation based on the alertness level parameter. When alertness is low, greater output limitation is applied to ensure stability; when alertness is high, the limitation is reduced or removed, allowing full driver operation effectiveness. This parameter-based adaptation resolves the contradiction by making the limitation conditional rather than absolute
Data Source
AI summary
A driving takeover control apparatus is equipped in a vehicle capable of travelling by automated driving and controls a driving takeover operation at a transition from high automated driving to low automated driving. The apparatus includes a driver operation device, a vehicle driving device, an alertness detecting device, a computation control device, and an output limiting device. A driver operates the driver operation device to steer the vehicle and adjust a vehicle speed. The vehicle driving device steers the vehicle and adjusts the vehicle speed based on an operation amount given to the driver operation device. The alertness detecting device is detects an alertness level of the driver at the transition. The computation control device drives the output limiting device to perform an output limitation operation if the alertness level is a certain level or lower. The output limiting device limits an output of the vehicle driving device.