Driver-Aware Stop-Hold Brake Control After Automatic Vehicle Stopping
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Solution Overview
Problem
Uniform termination of stop holding control when a predetermined time has elapsed can lead to secondary damage due to cancellation when the driver is unable to perceive surrounding information.
Innovation Solution
A vehicle control device that includes an automatic brake unit, a stop holding unit, a stop holding cancellation unit, and a driver status acquisition unit, where the stop holding cancellation unit adjusts the stop holding cancellation condition based on the driver's status, thereby extending the stop holding control if the driver is in an abnormal state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stop holding control is uniformly terminated when a predetermined time has elapsed, then the control system operates simply and predictably, but secondary damage may occur due to premature cancellation when the driver is unable to perceive surrounding information
Solution Approach 1:
The system introduces feedback by continuously monitoring driver status (through cameras, sensors, or other detection means) and using this information to dynamically adjust the stop holding control termination. The driver status information feeds back to the control unit, which modifies the cancellation timing based on whether the driver is in a normal or abnormal state, thereby improving safety without excessive complexity
Solution Approach 2:
The control system transitions from a static, fixed-time termination approach to a dynamic approach where the termination condition adapts based on real-time driver status. The stop holding cancellation timing is no longer fixed but varies dynamically according to the detected driver state, allowing the system to extend hold duration when needed while maintaining simple operation when the driver is normal
2Object-affected harmful factors
If the stop holding cancellation condition is changed based on driver status, then the risk of secondary damage is reduced, but the control system becomes more complex
Solution Approach 1:
The system applies different control characteristics to different driver states. Instead of a uniform cancellation policy, the system implements localized control adjustments specific to each driver status category (normal vs. abnormal). This allows targeted protection against secondary damage only when the driver is unable to perceive surroundings, without affecting normal operation otherwise
Solution Approach 2:
The system changes the termination parameter (cancellation timing) based on the driver status parameter. When the driver status changes from normal to abnormal, the cancellation time parameter is extended. This parameter-based adaptation allows the system to respond to driver conditions while maintaining a relatively simple control structure that primarily adjusts timing parameters rather than complex control logic
Data Source
AI summary
A vehicle control device includes: an automatic brake control unit that performs automatic brake control for automatically stopping a host vehicle by applying a braking force to the host vehicle; a stop holding control unit that performs stop holding control for holding the host vehicle in a stopped state by applying a braking force to the host vehicle in a state of being stopped by the automatic brake control unit; a stop holding cancellation control unit that cancels a stop holding state of the host vehicle by terminating the stop holding control when a predetermined stop holding cancellation condition is met when the stop holding control is performed; and a driver status acquisition unit that acquires a driver status that is a status of a driver of the host vehicle. The stop holding cancellation control unit changes the stop holding cancellation condition according to the driver status.