Deceleration Coordination for Autonomous Vehicle Safety
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Summary
Problems
Existing autonomous vehicle systems lack an efficient method for coordinating deceleration among vehicles in a platoon, which can lead to uncomfortable decelerations and increased mechanical stress.
Innovation solutions
The proposed method involves an optical communication system that allows vehicles to share deceleration information, enabling each vehicle to determine its own deceleration rate based on the speed and deceleration of adjacent vehicles, thereby optimizing deceleration across the platoon.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If vehicles decelerate using traditional coordinated methods, then all vehicles can maintain uniform deceleration, but this causes uncomfortable decelerations and increased mechanical stress
Why choose this principle:
The patent applies local quality by allowing each vehicle to have different deceleration rates based on its individual characteristics and position in the platoon. Instead of uniform deceleration, each vehicle determines its own deceleration rate considering factors like braking capability, speed, and distance to adjacent vehicles, thereby reducing mechanical stress while maintaining coordination.
Principle concept:
If vehicles decelerate using traditional coordinated methods, then all vehicles can maintain uniform deceleration, but this causes uncomfortable decelerations and increased mechanical stress
Why choose this principle:
The system dynamically adjusts deceleration rates for each vehicle based on real-time conditions. Vehicles can change their deceleration profiles during the braking event, with upstream vehicles potentially decelerating at different rates than downstream vehicles, optimizing the overall platoon behavior and reducing mechanical stress on individual vehicles.
Application Domain
Data Source
AI summary:
The proposed method involves an optical communication system that allows vehicles to share deceleration information, enabling each vehicle to determine its own deceleration rate based on the speed and deceleration of adjacent vehicles, thereby optimizing deceleration across the platoon.
Abstract
A method of decelerating a plurality of vehicles along a roadway may include, at a first vehicle, receiving, from an adjacent downstream vehicle, a first braking initiation signal and a first deceleration value indicating a deceleration rate of the adjacent downstream vehicle, determining a first distance to the adjacent downstream vehicle, and determining, based at least in part on the first distance, a second deceleration value configured to prevent the first vehicle from colliding with the adjacent downstream vehicle. The method may further include in accordance with a determination that the second deceleration value is greater than or equal to an upper deceleration value, decelerating at the upper deceleration value, and, in accordance with a determination that the second deceleration value is less than the upper deceleration value and greater than a lower deceleration target, decelerating at the second deceleration value.