Vehicle Platoon Backup Trajectories for V2V Failure Handling
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Solution Overview
Problem
Current vehicle platooning strategies face challenges in increasing safety and reducing complexity, particularly in handling abnormal situations and maintaining accurate inter-vehicle distances without relying heavily on sensors.
Innovation Solution
A method involving the generation of a backup trajectory using surroundings data, which is communicated to follower vehicles, allowing them to follow a pre-planned path in case of predetermined conditions such as loss of communication or safety hazards, thereby ensuring safe stopping without the need for sophisticated sensors in the follower vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If follower vehicles use sensors to detect and follow the lead vehicle, then measurement precision of inter-vehicle distance is improved, but device complexity increases
Solution Approach 1:
The patent introduces V2V communication as an intermediary mechanism that allows follower vehicles to directly receive position and trajectory information from the lead vehicle, eliminating the need for complex sensor systems. The communication system acts as a mediator that transfers spatial information between vehicles, achieving accurate distance measurement without physical sensors.
Solution Approach 2:
The patent replaces the mechanical/sensor-based detection system with a communication-based information transfer system. Instead of using radar, lidar, or cameras to detect the lead vehicle's position, the system substitutes these with V2V communication protocols that transmit position coordinates and trajectory data wirelessly, significantly reducing hardware complexity.
2Device complexity
If follower vehicles rely solely on V2V communication without backup systems, then device complexity is reduced, but reliability decreases in abnormal situations
Solution Approach 1:
The patent implements preliminary action by pre-calculating and storing backup trajectories before abnormal situations occur. The lead vehicle continuously computes alternative safe paths and transmits them to follower vehicles in advance, so that when communication fails or hazards are detected, follower vehicles can immediately execute pre-planned backup trajectories without real-time computation delays.
Solution Approach 2:
The patent applies beforehand cushioning by providing follower vehicles with pre-computed backup trajectories that serve as a safety cushion against communication failures. These backup paths are prepared in advance and stored in the follower vehicles' memory, creating a protective buffer that ensures safety even when the primary V2V communication link is lost or compromised.
3Reliability
If the lead vehicle generates and transmits backup trajectories to all follower vehicles, then reliability in abnormal situations is improved, but loss of information increases due to communication overhead
Solution Approach 1:
The patent applies local quality by customizing the information transmission based on each follower vehicle's specific characteristics and position. The lead vehicle generates backup trajectories tailored to each follower's mass, dimensions, and spatial relationship to the lead vehicle, rather than transmitting generic information. This targeted approach reduces redundant data transmission while ensuring each vehicle receives precisely the information it needs for safe operation.
Data Source
AI summary
The invention relates to a method for a string comprising a plurality of vehicles, including a lead vehicle and at least one follower vehicle, comprising the follower vehicle following, by means of vehicle-to-vehicle communication, the lead vehicle in a follower trajectory. The method comprises generating surroundings data, regarding the surroundings of at least a part of the string, generating, using the surroundings data, a backup trajectory, which is different from the follower trajectory, wherein the generated backup trajectory, or the surroundings data, is received by at least one of the at least one follower vehicle, wherein the receiving follower vehicle follows the generated backup trajectory, upon a determination of a predetermined condition for following the generated backup trajectory.