Autonomous Vehicle Ramp Entry Control From Driver Steering Intent
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Autonomous vehicles often decelerate unnecessarily when deviating from a predetermined on-ramp/off-ramp route due to driver intent, leading to prolonged deceleration contrary to the driver's wishes.
Innovation Solution
An autonomous vehicle controller determines the driver's intent through steering wheel manipulation and vehicle positioning, adjusting the route and speed accordingly to maintain or accelerate to the desired speed without entering the on-ramp/off-ramp, using sensors and GPS for precise navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the autonomous vehicle applies preliminary deceleration when approaching the on-ramp/off-ramp entry point, then the vehicle speed is reduced to maintain driving stability on curved sections, but the vehicle speed is reduced unnecessarily when the driver intends to deviate from the predetermined route
Solution Approach 1:
The system performs preliminary deceleration only when the driver's intention to enter the on-ramp/off-ramp is detected through steering wheel manipulation. By detecting the steering angle and duration before the vehicle reaches the entry point, the system applies deceleration in advance only when necessary, avoiding unnecessary speed reduction when the driver intends to maintain the current route
Solution Approach 2:
The system continuously monitors steering wheel manipulation signals to detect driver intention. When the steering angle exceeds a predetermined threshold for a specific duration, the system interprets this as the driver's intention to enter the on-ramp/off-ramp and adjusts deceleration accordingly. This feedback mechanism ensures deceleration is applied only when the driver intends to change route, resolving the contradiction between maintaining stability and preserving speed
2Reliability
If the autonomous vehicle maintains deceleration until re-routing is completed, then the vehicle follows the driver's intended route deviation, but the deceleration prolongs unnecessarily when the driver quickly corrects the steering input
Solution Approach 1:
The system dynamically adjusts the deceleration duration based on the driver's steering input characteristics. By monitoring whether the steering angle remains above the threshold for a predetermined time period, the system determines whether to continue or cancel deceleration. This dynamic adjustment ensures deceleration is maintained only when the driver genuinely intends to deviate from the route, reducing unnecessary deceleration time when the driver quickly corrects steering
Solution Approach 2:
The system uses periodic detection of steering wheel manipulation to determine driver intention. By checking whether the steering angle exceeds the threshold for a specific duration (periodic time check), the system decides whether to initiate or maintain deceleration. This periodic verification prevents prolonged deceleration when the driver's intention is temporary or corrective rather than intentional route deviation
Data Source
AI summary
Disclosed herein are an autonomous vehicle and a method of controlling the same. The autonomous vehicle controller may determine a lane on which a first vehicle is currently travelling, determine a second vehicle that is ahead of the first vehicle, determine, based on receiving from a steering wheel an indication of changing a travelling direction of the first vehicle and while the first vehicle is in an autonomous driving mode, whether the first vehicle is travelling along a predetermined route at an entry point of a ramp, and control, based on determining whether the first vehicle is travelling along the predetermined route at the entry point of the ramp, a route and a speed of the first vehicle.