Driving Control Apparatus for Dynamic Override Threshold Adjustment
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Solution Overview
Problem
Existing partially automated driving systems, such as automated merging systems using road-to-vehicle communication, face challenges in preventing lane departure and collisions due to excessive driver intervention during communication failures, as they lack effective override threshold adjustments to manage steering and braking operations.
Innovation Solution
A driving control apparatus with an environmental condition estimating part, path generating part, and vehicle control part that adjusts override threshold values for acceleration, braking, and steering interventions to higher levels during communication failures, ensuring smooth transition to fallback control and preventing excessive operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the override threshold values are kept at normal levels during communication failure, then the driver can quickly take over control, but the vehicle may experience excessive operation intervention causing lane departure or collision with other vehicles
Solution Approach 1:
The override threshold values are dynamically adjusted based on the communication status. During normal operation, the threshold values are set at standard levels to allow quick driver takeover. When communication failure is detected, the threshold values are automatically increased to prevent excessive operation intervention, and then gradually returned to normal levels after communication is restored, creating a dynamic adaptation to operational conditions
Solution Approach 2:
The system changes the parameter of override threshold values from fixed normal levels to variable levels that are increased during communication failure. This parameter change allows the system to maintain higher safety margins when communication with other vehicles is lost, preventing dangerous operations while still allowing necessary driver intervention
2Extent of automation
If the automated merging system continues operation using only sensor information after communication failure, then the system maintains automated control, but it cannot detect other vehicles in the merged lane leading to potential collisions
Solution Approach 1:
The system prepares for communication failure by having the driver provide advance notice before merging. During communication failure, the system relies on this pre-established awareness and the driver's attention to compensate for the lack of real-time vehicle information, creating a cushion of safety against potential collisions
Solution Approach 2:
When direct communication with other vehicles fails, the system uses the driver as an intermediary who provides situational awareness and manual monitoring. The driver fills the information gap left by failed vehicle-to-vehicle communication, allowing the automated system to continue operation with enhanced human oversight
3Reliability
If the override threshold values are increased during communication failure, then excessive driver intervention is prevented, but the transition to fallback control may be delayed
Solution Approach 1:
The override threshold values are dynamically adjusted rather than permanently increased. During communication failure, the elevated thresholds maintain operational stability, but once communication is restored, the thresholds automatically return to normal levels, enabling timely transition back to standard control modes without permanent delay
Data Source
AI summary
A driving control apparatus for a vehicle having a function for generating a target path to a predetermined range as a target and performing automated lane change to a neighboring lane when no other vehicle is recognized in the predetermined range of the neighboring lane by a surrounding recognition function and a merging support function for generating a target path using other vehicle information obtained by a communication function, performing acceleration/deceleration control and steering control, and automatically merging to a merged lane, wherein the driving control apparatus has a function for altering override threshold values serving as a determination criterion of operation intervention for stopping the acceleration/deceleration control and the steering control to a value greater than during normal operation of the communication function when failure occurs in the communication function during the automated merging.