Autonomous Vehicle Deceleration Control for Stable Platooning
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Solution Overview
Problem
Autonomous driving vehicles experience traffic congestion and potential collisions due to rapid decelerations in platooning scenarios, leading to string instability and safety issues.
Innovation Solution
An autonomous driving control apparatus and method that includes sensors, communication devices, and processors to adjust deceleration limits based on vehicle information and AI learning, using speed control signals and excessive deceleration limit modes to manage deceleration levels and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rapid deceleration is applied to maintain safe following distance, then collision prevention is improved, but traffic congestion and string instability worsen
Solution Approach 1:
The patent implements dynamic adjustment of deceleration limits based on real-time driving conditions, communication status, and vehicle platoon state. The excessive deceleration limit is not fixed but adapts dynamically through feedback from sensors and communication devices, allowing the system to maintain string stability while preventing collisions by adjusting deceleration behavior according to current platoon dynamics and environmental factors.
Solution Approach 2:
The system changes the deceleration parameter (excessive deceleration limit) based on multiple conditions including communication status with leading vehicle, detected driving environment, and platoon configuration. By modifying this key parameter dynamically, the system resolves the contradiction between maintaining safe distances and preserving overall platoon stability.
2Stability of the object's composition
If excessive deceleration limit is increased to reduce traffic congestion, then traffic flow stability is improved, but collision risk worsens
Solution Approach 1:
The system continuously monitors multiple feedback signals including sensor data about surrounding vehicles, communication status with leading vehicle, and current deceleration rate. This feedback loop allows the system to adjust the excessive deceleration limit in real-time, increasing it when traffic flow stability is prioritized and decreasing it when collision risk emerges, thus resolving the contradiction between these two objectives.
Solution Approach 2:
The autonomous driving system independently adjusts its own deceleration behavior based on integrated information from sensors and communication devices. By self-regulating the excessive deceleration limit according to real-time conditions, the system simultaneously maintains traffic flow stability and prevents collisions without external intervention.
3Reliability
If deceleration limit is strictly controlled to prevent collision, then safety is improved, but traffic congestion increases
Solution Approach 1:
The patent implements dynamic control of the deceleration limit rather than strict fixed control. The excessive deceleration limit adapts based on communication status, environmental sensors, and platoon state, allowing stricter control when safety is critical and more flexible control when traffic flow efficiency can be improved, thus resolving the contradiction between safety and productivity.
Data Source
AI summary
The present disclosure relates to an autonomous driving control apparatus and a control method thereof. An autonomous driving control apparatus may include a sensor device, a communication device, one or more processors, and memory. The sensor device may detect a leading vehicle of a host vehicle. The communication device may receive, from the leading vehicle, vehicle information of the leading vehicle. The autonomous driving control apparatus may, based on a deceleration request of the host vehicle, operate in an excessive deceleration limit mode; determine, based on the vehicle information of the leading vehicle, a speed control signal for changing a vehicle speed of the leading vehicle; and adjust, based on the speed control signal and while operating in the excessive deceleration limit mode, an excessive deceleration limit level of the host vehicle.