Vehicle Driving Control Override Threshold Adjustment
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Solution Overview
Problem
During convoy cruise using cooperative adaptive cruise control (CACC), communication failures can lead to unnecessary driver operation interventions, causing lane departure or approaching a following vehicle due to excessive brake or steering actions.
Innovation Solution
A driving control apparatus with a vehicle-to-vehicle communication system that alters override threshold values for brake and steering interventions during communication failures, shifting to tracking control and preventing excessive operation by increasing these thresholds, thereby maintaining safe distance and lane position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If override threshold values are kept at normal levels during communication failure, then driver responsiveness is maintained, but excessive brake or steering operations cause lane departure or approach to following vehicle
Solution Approach 1:
The override threshold values are dynamically adjusted based on communication status. During normal operation, standard threshold values allow driver responsiveness. When communication failure is detected, the threshold values are increased to prevent excessive operations, and return to normal values when communication is restored, thus adapting the system behavior to current operational conditions
Solution Approach 2:
The system changes the parameter of override threshold values from normal levels to increased levels during communication failure. This parameter change prevents excessive brake or steering operations that could cause lane departure or approach to following vehicle, while maintaining the ability to detect genuine emergency situations
2Reliability
If threshold values are increased to prevent excessive operation, then safety is improved, but legitimate emergency responses may be delayed
Solution Approach 1:
The threshold values are dynamically adjusted based on communication status rather than being fixed. During communication failure, increased thresholds prevent excessive operations, but the system continuously monitors for genuine emergencies, restoring normal thresholds when communication is reestablished, thus balancing safety and responsiveness
Solution Approach 2:
The system implements feedback monitoring of communication status and operational patterns. When communication failure is detected, the system adjusts threshold values and continues to monitor driver inputs. If genuine emergency operations are detected even during communication failure, the system can override the increased thresholds to ensure appropriate response
Data Source
AI summary
A driving control apparatus for a vehicle having a CACC function for performing convoy cruise by cooperative adaptive cruise control using an ACC function together with driving information on convoy vehicles obtained by vehicle-to-vehicle communication, and a tracking control function for performing steering control to perform following cruise to the preceding vehicle when it is determined that a lane cannot be recognized during the convoy cruise, the driving control apparatus has a function for: notifying a driver of CACC function cancelation and of tracking control start, in case in which failure has occurred in the vehicle-to-vehicle communication or the lane cannot be recognized during the convoy cruise; shifting to following cruise by the tracking control function; and setting override threshold values serving as a determination criterion of operation intervention for stopping the tracking control function to a second value greater than a first value of during normal operation.