Driving Assistance Control for Limited Lateral Avoidance Space
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Solution Overview
Problem
Existing vehicle control systems struggle to perform appropriate operations in response to sudden changes in the surrounding environment, particularly when automated steering control is difficult due to lack of lateral avoidance space for target objects.
Innovation Solution
A driving assistance device that executes preliminary operations based on varying thresholds and adjusts these operations according to the surrounding situation, including early and multi-step alerts or braking forces, to prepare for potential collisions and ensure appropriate vehicle maneuvers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automated steering control is added to automated deceleration control, then the ability to cope with sudden environmental changes is improved, but the control margin is reduced when there is no lateral avoidance space
Solution Approach 1:
The patent segments the automated control into two independent modules: automated deceleration control and automated steering control. The control selection unit determines which module to activate based on the availability of lateral avoidance space. This segmentation allows the system to have both capabilities available while adapting which one is used depending on the situation, resolving the contradiction between improved reliability and reduced adaptability.
Solution Approach 2:
The patent implements dynamic control selection where the system transitions between different control modes (deceleration-only or steering-assisted) based on real-time assessment of lateral avoidance space. The control selection unit dynamically adjusts the control strategy by evaluating environmental conditions and selecting the appropriate control module, thereby maintaining adaptability while providing enhanced reliability when conditions permit.
2Ease of operation
If conventional technology is used without differentiating avoidance space situations, then the system is simple to operate, but it cannot perform appropriate operations corresponding to different surrounding environments
Solution Approach 1:
The control selection unit automatically assesses the surrounding environment and determines the appropriate control mode without requiring driver input or complex manual adjustments. The system performs self-service by autonomously evaluating lateral avoidance space availability and selecting the suitable control module, thereby maintaining ease of operation while achieving high adaptability to different situations.
Solution Approach 2:
The patent implements a feedback mechanism where the control selection unit continuously monitors the surrounding environment, particularly the availability of lateral avoidance space, and adjusts the control strategy accordingly. This feedback loop enables the system to adapt to different situations automatically while maintaining simple operation for the driver, as no manual intervention is needed to switch between control modes.
3Reliability
If preliminary operations are executed at multiple thresholds, then the control margin is improved, but the device complexity increases
Solution Approach 1:
The patent segments the threshold-based control into distinct levels: a first threshold for initiating preliminary operations and a second threshold for executing full automated control. This segmentation of control stages allows the system to provide graduated responses based on urgency, improving control margin through multiple response levels while managing complexity by using clear, discrete threshold boundaries.
Solution Approach 2:
The patent implements preliminary deceleration operations when the first threshold is met, preparing the vehicle for potential full automated control before the second threshold is reached. This preliminary action provides an intermediate response that improves control margin by allowing gradual intervention, while the structured two-threshold approach keeps the control logic manageable and not overly complex.
Data Source
AI summary
A driving assistance device is configured to: refer to an output of a detection device for detecting that an object is located in front of a vehicle; execute one or both of instructing a brake device of the vehicle to stop the vehicle and instructing a steering device of the vehicle to avoid a collision with the object by steering when an indicator value is less than a first threshold; execute a first preliminary operation when the indicator value is less than a second threshold; execute a second preliminary operation when the indicator value is less than a third threshold and it is determined that there is no travel path along which the vehicle is able to travel on both lateral sides of the object.