Lane-Merging Acceleration Guidance Adapted to Driver Tendency
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Solution Overview
Problem
Existing driving assistance systems fail to provide appropriate acceleration/deceleration instructions for drivers during lane merging, particularly into main lanes.
Innovation Solution
A driving assistance device that generates a target operation amount profile based on the driver's tendency and vehicle dynamics, adjusting the accelerator operation to ensure safe merging by outputting instructions when deviations occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed target operation amount profile is used for lane merging, then the control logic is simple, but it cannot adapt to different driver tendencies and velocity conditions
Solution Approach 1:
The target operation amount profile is made dynamic by adjusting it according to the driver's tendency and the current velocity condition. The system switches between different profile types (first type for aggressive drivers, second type for conservative drivers) based on detected driving patterns, allowing the control system to adapt to individual driver preferences while maintaining manageable complexity through rule-based selection
Solution Approach 2:
The system changes the parameters of the target operation amount profile based on the index value calculated from velocity and acceleration. When the index value exceeds a threshold, the system switches to a different profile type with adjusted parameters, enabling adaptation to different driving styles without requiring a completely new control architecture
2Measurement precision
If the target operation amount profile is adjusted based on velocity and acceleration, then the driving assistance becomes more accurate, but the calculation complexity increases
Solution Approach 1:
The system performs preliminary calculation of the index value using velocity and acceleration data before determining the target operation amount profile. By pre-calculating this composite parameter, the system avoids complex real-time adjustments during control execution, simplifying the overall calculation process while maintaining accuracy
Solution Approach 2:
The index value serves as an intermediary parameter that combines velocity and acceleration information into a single metric. This intermediary simplifies the control logic by reducing multiple input variables to a single threshold-based decision point, balancing accuracy with computational simplicity
3Manufacturing precision
If pole-assignment control is used to generate the target operation amount profile, then the merging control precision is improved, but the control system complexity increases
Solution Approach 1:
Pole-assignment control is applied dynamically during the lane merging process, adjusting the target operation amount profile based on the vehicle's current state and the detected driver tendency. This dynamic application of pole-assignment control maintains high precision while avoiding the need for a permanently complex control system that would be required if full pole-assignment were applied to all operating conditions
Data Source
AI summary
A driving assistance device includes a storage medium storing computer-readable instructions and a processor connected to the storage medium, the processor executing the computer-readable instructions to generate a target operation amount profile that is a time-series change in a target acceleration operation amount when a mobile object merges into a main lane, and cause an information output device to output information when an actual acceleration operation amount that is an amount of acceleration operation performed on an acceleration operator by a driver of the mobile object has deviated from a prescribed range including the target acceleration operation amount. Generating the target operation amount profile includes changing the target operation amount profile based on a driving tendency of the driver.