Driving Assistance Control for Curved-Road Obstacle Avoidance
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Solution Overview
Problem
Conventional driving assistance systems struggle to perform appropriate preliminary operations in response to varying surrounding environments, particularly when a target object is present on a curved road, leading to inadequate control margins.
Innovation Solution
A driving assistance device that includes a controller capable of stopping a vehicle by instructing the brake device and performing steering avoidance, with the controller restricting preliminary operations on curved roads more than on straight roads, and executing these operations when the degree of approach between the vehicle and the target object satisfies specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller performs preliminary operations (raising deceleration level or giving notification) when a target object is detected on a curved road, then the control margin is improved, but the reliability deteriorates due to uncertain lane position recognition
Solution Approach 1:
The controller performs preliminary operations (raising deceleration level or giving notification to the driver) in advance when a target object is detected on a curved road, before the degree of approach becomes critical. This preliminary action provides additional time and control margin to handle the situation safely, accounting for the reduced reliability of lane position recognition on curved roads.
2Loss of information
If the controller restricts preliminary operations on curved roads, then the false notification is reduced, but the control margin deteriorates
Solution Approach 1:
The controller applies different control strategies based on the local characteristics of the road. On curved roads, the controller selectively performs preliminary operations only when specific conditions are met (target object detected, degree of approach below threshold), rather than uniformly restricting or performing operations in all situations. This local differentiation reduces false notifications while maintaining adequate control margin.
3Speed
If the controller performs automatic steering control to avoid contact with the target object, then the response speed is improved, but the adaptability deteriorates when there is no avoidance space on the lateral side
Solution Approach 1:
The controller dynamically adjusts the control strategy based on the surrounding environment. When there is sufficient lateral avoidance space, the controller performs automatic steering control to quickly avoid the target object. When no avoidance space is available, the controller switches to automatic deceleration control. This dynamic adaptation ensures both fast response when possible and appropriate behavior when environmental constraints prevent steering avoidance.
Data Source
AI summary
A driving assistance device including: a controller configured to stop a vehicle by instructing a brake device of the vehicle in a case in which the degree of approach between a target object among objects and the vehicle satisfies a first condition by referring to an output of a detection device detecting presence of the objects that are present in front of the vehicle; and a steering avoidance controller configured to instruct a steering device of the vehicle to avoid contact with the target object using steering, in which the controller restricts a preliminary operation performed in a case in which the target object is present on a curved road more than a preliminary operation performed in a case in which the target object is not present on a curved road; and the preliminary operation is executed in a case in which the degree of approach between the vehicle and the target object is lower than the first condition.