Platooning Controller Emergency Braking Coordination
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Solution Overview
Problem
During platooning, vehicles face challenges in quickly responding to emergency braking situations due to long braking distances, especially for heavy trucks, and may collide or cause damage when normal vehicles brake in front of a broken-down vehicle, affecting stability.
Innovation Solution
A platooning controller that shares information about a broken-down vehicle with other vehicles in the platoon, rearranges their positions, and controls braking to minimize distance and prevent collisions by determining the road situation and using both main and sub-braking devices to center and decelerate vehicles appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a large truck uses only a retarder for braking, then the braking system is simple, but the braking distance becomes too long to respond to emergency situations
Solution Approach 1:
The patent combines the main braking device and sub-braking device (retarder) into a unified braking system that operates together. The controller coordinates both braking devices to provide sufficient braking force for emergency situations while maintaining system simplicity through integrated control logic.
Solution Approach 2:
The braking system dynamically switches between different braking device combinations based on road conditions and emergency levels. The controller adjusts the contribution of main brake and retarder in real-time, providing strong braking for emergencies while using retarder alone for normal conditions, thus optimizing both response time and system simplicity.
2Reliability
If a normal vehicle brakes in front of a broken-down vehicle, then the broken-down vehicle can be stopped, but vehicle damage occurs due to impact upon collision
Solution Approach 1:
The system pre-positions a normal vehicle in front of the broken-down vehicle before emergency braking occurs. This cushioning vehicle absorbs the impact force, preventing direct collision damage to the broken-down vehicle while still enabling effective stopping through coordinated braking control.
Solution Approach 2:
A normal vehicle acts as an intermediary between the broken-down vehicle and the obstacle. This mediator vehicle takes the brunt of the impact, protecting the broken-down vehicle from direct damage while maintaining the ability to stop the platoon through its braking action.
3Speed
If an impact is not applied to the center of the vehicle during braking, then braking can occur, but vehicles rotate each other to pass the line and stability is compromised
Solution Approach 1:
The system intentionally creates asymmetric positioning where the normal vehicle is placed slightly offset from the exact center of the broken-down vehicle. This controlled asymmetry allows braking force application that prevents rotational instability while maintaining effective stopping, avoiding the symmetry that would cause vehicles to rotate around each other.
Solution Approach 2:
The braking force is applied at specific localized points rather than uniformly across the vehicle. The system applies brake force at positions that generate stabilizing moments, creating local quality differences in force application that prevent rotational instability while maintaining overall braking effectiveness.
Data Source
AI summary
A platooning controller includes a processor configured to share information about a first platooning vehicle of a group of platooning vehicles with other platooning vehicles of the group of platooning vehicles when a brake of the first platooning vehicle breaks down during platooning and to perform braking control, and a storage configured to store data and an algorithm for platooning and braking control by the processor. The processor is configured to rearrange the group of platooning vehicles depending on a location where the first platooning vehicle is arranged in a platoon line, to decelerate the first platooning vehicle and a second platooning vehicle in front of the first platooning vehicle, and to center the first platooning vehicle and the second platooning vehicle to perform the braking control.