Trailer Platooning Control Using Induced Jackknife Braking Space
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Solution Overview
Problem
In platooning scenarios, trailer vehicles face challenges in maintaining sufficient inter-vehicle distance during emergency braking, leading to potential collisions due to the jackknife phenomenon, which can cause accidents and instability in the coupling between the tractor and trailer.
Innovation Solution
A device and method that include a jackknife induction determination module to assess the need for jackknife induction control, providing additional braking distance by inducing pivoting of the trailer, thereby reducing the likelihood of collisions by allowing the trailer to deviate from its lane and creating space for following vehicles to stop safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the leading vehicle performs emergency braking to prevent jackknife phenomenon, then the stability of platooning is improved, but the following vehicle cannot secure sufficient braking distance and may collide with the leading vehicle
Solution Approach 1:
The system performs preliminary assessment of the braking situation by the following vehicle before the leading vehicle brakes. The following vehicle calculates whether it can stop within the current inter-vehicle distance and, if not, requests jackknife induction control in advance, allowing the leading vehicle to prepare for controlled jackknife motion to create additional safety margin
Solution Approach 2:
The solution transitions from one-dimensional longitudinal braking control to two-dimensional control by introducing lateral jackknife motion. The leading vehicle's trailer is induced to pivot laterally, creating horizontal displacement that effectively increases the longitudinal braking distance available to the following vehicle
2Reliability
If the following vehicle maintains a larger inter-vehicle distance to avoid collision, then collision risk is reduced, but the productivity of platooning decreases due to reduced vehicle density
Solution Approach 1:
The system dynamically adjusts the inter-vehicle distance based on real-time conditions. During normal operation, vehicles maintain small distances for high productivity. During emergency braking, the following vehicle requests and the leading vehicle executes jackknife induction control, dynamically increasing the effective safety distance only when needed
3Reliability
If jackknife induction control is executed by the leading vehicle, then additional braking distance is provided to following vehicles, but the complexity of the braking control system increases
Solution Approach 1:
The following vehicle continuously monitors the inter-vehicle distance and leading vehicle braking state, calculating whether collision can be avoided. This feedback is transmitted to the leading vehicle, which then decides whether to execute jackknife induction control, creating a closed-loop control system that activates complex functions only when necessary
4Reliability
If the trailer is induced to pivot during emergency braking, then additional space is created for following vehicles to stop, but the coupling between tractor and trailer experiences increased stress
Solution Approach 1:
The jackknife induction control applies a controlled, predetermined pivoting motion to the trailer that counteracts the uncontrolled jackknife phenomenon. By inducing a moderate, controlled pivot in the desired direction, the system prevents the harmful uncontrolled bending that would otherwise occur during emergency braking
Data Source
AI summary
A device and a method for controlling collision avoidance of a trailer vehicle in platooning include a jackknife induction determination module or operation that determines whether to execute jackknife induction control in a leading vehicle when an emergency braking situation occurs during platooning of the trailer vehicle. The device and method also include a jackknife induction control module or operation that provides an additional braking distance of a following vehicle at the rear of a tractor by inducing pivoting of a trailer while controlling the tractor and trailer of the leading vehicle, respectively, to allow a jackknife phenomenon to occur. Stability of the platooning is improved by reducing a possibility of the occurrence of a collision accident by the following vehicle even during emergency braking.