Vehicle Border Speed Control Using Predicted Trajectory Paths
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Solution Overview
Problem
Existing vehicle control systems, such as geofencing, often result in sudden and disadvantageous speed changes upon crossing boundaries, failing to provide a smooth transition in speed control.
Innovation Solution
A method that determines a predicted trajectory path, identifies a trajectory position relative to a border, and adjusts speed based on a separation distance threshold using sensors and prediction algorithms to ensure a gradual speed reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If geofencing is used to regulate vehicle speed based on position relative to a boundary, then speed control is achieved, but sudden and disadvantageous speed changes occur upon crossing the boundary
Solution Approach 1:
The system performs preliminary action by determining a predicted trajectory path and identifying a trajectory position (point of interest) before the vehicle actually reaches the border. Speed control is initiated at this preliminary position rather than at the border itself, allowing the vehicle to gradually reduce speed before encountering the boundary, thus avoiding sudden speed changes.
Solution Approach 2:
The approach divides the speed control process into segments: first determining the predicted trajectory path, then identifying a specific trajectory position along that path, and finally applying speed control based on the separation distance at that position. This segmentation allows for progressive and controlled speed adjustment rather than abrupt changes.
2Reliability
If binary effect geofencing is used to control vehicle speed, then boundary enforcement is achieved, but smooth speed transition is lost
Solution Approach 1:
The system determines a predicted trajectory path and identifies a trajectory position before the vehicle reaches the border. By calculating the separation distance at this preliminary position and comparing it to a distance threshold, the system initiates speed control in advance, enabling a progressive speed reduction that maintains both boundary enforcement and smooth transition.
3Reliability
If distance-based speed regulation is used from current vehicle position to border, then speed control is implemented, but sudden speed changes occur upon crossing
Solution Approach 1:
Instead of measuring distance from the current vehicle position to the border, the system determines a predicted trajectory path and identifies a trajectory position (point of interest) along that path. This preliminary determination allows the system to calculate the separation distance at a future point, enabling continuous and smooth speed control as the vehicle approaches the border along its intended path.
Data Source
AI summary
The present application relates to a method for controlling a vehicle relative to a border within a geographic region. The method, executed by a processor of the vehicle, includes the steps of determining a predicted trajectory path of the vehicle; determining a trajectory position of the vehicle, the trajectory position corresponding to a point of interest related to a distance between the vehicle and the border on the predicted trajectory path; determining a separation distance between the border and the trajectory position; and in response to the separation distance being less than a distance threshold, controlling a speed of the vehicle.