Driving Control Device Lateral Movement Restriction
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Solution Overview
Problem
Existing driving control devices face challenges in maintaining stable vehicle control when detection precision of a leading vehicle is low, particularly in situations with large inter-vehicle distances or high road curvature, leading to erroneous lateral movement and destabilization.
Innovation Solution
A driving control device that adjusts the lateral movement restriction position based on recognition reliability, narrowing the permissible movement range by bringing the restriction position closer to the vehicle as detection precision declines, utilizing indices such as inter-vehicle distance, road curvature, and gradient to prevent erroneous lateral movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the inter-vehicle distance is great, then the movement range can be larger, but the detection precision with respect to the leading vehicle becomes low
Solution Approach 1:
The patent applies dynamics by making the restriction position adjustable based on detection precision. The restriction position is not fixed but dynamically changes according to the detected inter-vehicle distance and detection precision levels. When detection precision is low (at great inter-vehicle distances), the restriction position is brought closer to the vehicle to reduce the movement range and prevent erroneous lateral movement. This dynamic adjustment resolves the contradiction between maintaining a large movement range and ensuring detection precision.
2Adaptability or versatility
If the radius of curvature is small (high curvature), then the vehicle can navigate curves, but the detection precision with respect to the leading vehicle becomes low
Solution Approach 1:
The patent applies dynamics by adjusting the restriction position based on the radius of curvature of the road. When the vehicle is navigating a curve with small radius of curvature, the detection precision decreases. In response, the restriction position is brought closer to the vehicle to reduce the movement range and prevent erroneous lateral movement caused by poor detection precision. This dynamic adjustment allows the system to adapt to curve navigation while maintaining stability.
3Duration of action of stationary object
If the limiting distance is set higher to prevent disengagement, then course tracking control remains engaged longer, but erroneous recognition occurs more frequently
Solution Approach 1:
The patent applies parameter changes by adjusting the restriction position parameter based on the detected inter-vehicle distance and detection precision. Instead of using a fixed limiting distance, the system changes the restriction position parameter dynamically. When the inter-vehicle distance is great or detection precision is low, the restriction position is brought closer to the vehicle. This parameter change allows course tracking control to remain engaged while preventing erroneous recognition by reducing the permissible movement range under poor detection conditions.
4Volume of moving object
If the movement range is larger, then the vehicle has more freedom to track the leading vehicle, but lateral stability decreases when detection precision is low
Solution Approach 1:
The patent applies dynamics by making the restriction position adjustable based on detection precision levels. When detection precision is high, the restriction position is set farther from the vehicle, allowing a larger movement range for flexible tracking. When detection precision is low, the restriction position is brought closer to the vehicle, reducing the movement range to prevent erroneous lateral movement and maintain lateral stability. This dynamic adjustment resolves the contradiction between movement freedom and lateral stability.
Data Source
AI summary
A driving control device uses a recognition reliability, and more specifically, uses an inter-vehicle distance, a radius of curvature of a road, and a gradient of the road, to determine detection precision with respect to a leading vehicle. Lane markings are set as restriction positions in cases in which the recognition reliability for the leading vehicle is greater than or equal to a reference. Positions closer to the vehicle than the lane markings are set as the restriction positions in cases in which the recognition reliability for the leading vehicle is lower than the reference.