Driver-Abnormality Vehicle Control With Predictive Emergency Deceleration
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Solution Overview
Problem
Conventional vehicle control systems stop all controls, including lane keeping and deceleration, when the lane keeping control is canceled due to excessive lateral acceleration, rendering them unable to utilize the determination of a driver's abnormal state.
Innovation Solution
A vehicle control apparatus that includes sensors and actuators to maintain lane keeping and deceleration controls even when the lane keeping control is canceled, by predicting the vehicle's position and state to adjust the deceleration rate accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lane keeping control is automatically stopped/canceled when lateral acceleration exceeds the control limit, then the vehicle can maintain stability in curved roads, but the deceleration control and warning control are also stopped/canceled, making it impossible to utilize the determination of driver abnormal state
Solution Approach 1:
The control system is segmented into independent control modules: lane keeping control, deceleration control, and warning control. When lateral acceleration exceeds the control limit, only the lane keeping control is stopped/canceled while the deceleration control and warning control continue to operate. This segmentation allows the system to maintain vehicle stability in curved roads while preserving the ability to respond to driver abnormal states through deceleration and warnings.
2Productivity
If the deceleration control is maintained when lane keeping control is canceled, then the driver abnormal state can be detected and responded to, but the vehicle may not be able to stop before the control limit is exceeded in curved roads
Solution Approach 1:
The system performs preliminary determination of driver abnormal state before the vehicle completely stops. When the driver abnormal state is determined and the vehicle is predicted to enter a curved road before stopping, the system proactively issues warnings and initiates deceleration control in advance. This preliminary action ensures that the driver is alerted and the vehicle begins decelerating before the control limit is exceeded, maintaining both abnormal state response capability and stopping capability.
Solution Approach 2:
The system continuously monitors vehicle traveling state parameters (including lateral acceleration) and driver state parameters, and uses this feedback to dynamically adjust control actions. When the vehicle is predicted to enter a curved road, the feedback mechanism allows the system to assess the situation and maintain appropriate deceleration and warning controls while adapting to the changing vehicle state, ensuring the vehicle can stop safely before exceeding control limits.
Data Source
AI summary
A vehicle control apparatus determines whether or not a confirmed abnormal state in which it can be confirmed that a driver of a vehicle has fallen into an abnormal state where he/she is unable to drive the vehicle is occurring. When it is determined that the confirmed abnormal state is occurring, the apparatus decelerates the vehicle at a normal deceleration DGnor. However, when it is predicated that a control limit of a lane keeping control will come before the vehicle stops in the case where the vehicle is decelerated at the normal deceleration DGnor from when the confirmed abnormal state is determined to be occurring, the apparatus decelerates the vehicle at a maximum deceleration DGmax greater than the normal deceleration.