Adaptive Following Distance Control for Non-Longitudinal Lead Vehicle Motion
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Solution Overview
Problem
Existing following distance control systems for vehicles do not adequately respond to dynamic behaviors of the vehicle in front that deviate from purely longitudinal dynamics, particularly in adverse weather conditions, leading to potential safety risks.
Innovation Solution
A following distance control system that incorporates sensors to detect actual and expected dynamic behaviors, states, and lighting activations of the vehicle in front, allowing the electronic control system to adapt the following distance by adjusting the vehicle's drive or braking systems based on significant deviations from expected behaviors or conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the following distance control system only monitors purely longitudinal dynamic behavior, then the device complexity is reduced, but the reliability of the distance control in adverse conditions deteriorates
Solution Approach 1:
The dynamic behavior analysis is segmented into purely longitudinal dynamic behavior (monitored by radar) and other dynamic behaviors (monitored by camera). This segmentation allows the system to maintain low complexity for the primary distance control function while adding targeted monitoring for specific safety-critical scenarios without requiring full system complexity increase.
Solution Approach 2:
The camera acts as an intermediary component that specifically detects non-longitudinal dynamic behaviors and states, bridging the gap between simple longitudinal monitoring and comprehensive safety monitoring. The camera provides additional information about lateral movements, rotations, and vehicle states that the radar cannot detect, thereby improving reliability without requiring the entire system to become complex.
2Ease of operation
If the following distance control system monitors only longitudinal dynamic behavior, then the ease of operation is improved, but the adaptability to different driving scenarios deteriorates
Solution Approach 1:
The monitoring function is segmented into two independent parts: longitudinal dynamic behavior monitoring (simple, radar-based) and other dynamic behavior monitoring (enhanced, camera-based). This segmentation allows the system to operate simply under normal conditions while automatically adapting to complex scenarios when the camera detects relevant events, without requiring manual configuration or complex user interaction.
Solution Approach 2:
The system performs preliminary detection of various dynamic behaviors and states using the camera, identifying potential safety risks before they become critical threats. By detecting lateral movements, rotations, and abnormal vehicle states in advance, the system can proactively adjust the following distance, providing adaptability to different scenarios without requiring real-time complex analysis or user intervention.
3Reliability
If the following distance control system increases following distance in poor visibility conditions, then the safety is improved, but the productivity of the vehicle deteriorates
Solution Approach 1:
The safety monitoring is segmented into standard longitudinal monitoring and enhanced non-longitudinal monitoring. This allows the system to maintain normal following distances for the majority of time when only longitudinal behavior is present, preserving productivity, while automatically increasing following distance only when specific non-longitudinal dynamic behaviors or states are detected, thereby improving safety without significant productivity loss.
Solution Approach 2:
Instead of continuously increasing the following distance in poor visibility conditions, the system applies partial action by monitoring only specific critical dynamic behaviors (lateral movements, rotations, abnormal states) that truly require increased safety margins. This selective monitoring approach maintains normal productivity for routine driving while providing enhanced safety responses only when necessary, avoiding excessive reduction of vehicle throughput.
Data Source
AI summary
A following distance control system for a motor vehicle, which is configured to control at least one following distance of the motor vehicle in relation to a vehicle in front to a target following distance without intervention by a driver of the motor vehicle. The system includes a sensor system, configured to detect at least one actual following distance of the motor vehicle in relation to the vehicle in front in a detection range and to generate a distance signal as a function thereof, and an electronic control, configured to evaluate at least a distance signal and to generate a control signal for a drive device and/or a braking device of the motor vehicle.