Adaptive Cruise Control Lane Change Acceleration
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Solution Overview
Problem
Adaptive cruise control systems face delays in accelerating during lane changes due to the need to wait until a target vehicle is no longer in the host vehicle's path, which can hinder smooth lane change execution.
Innovation Solution
The system modifies the host vehicle's speed by adjusting the desired speed command based on a selected acceleration profile in response to a lane change initiation, using data from various sensors to anticipate and mimic human driving actions, thereby facilitating efficient lane changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adaptive cruise control system waits until the target vehicle is no longer in the host vehicle's path before accelerating, then the safety of the lane change is improved, but the time delay in executing the lane change increases
Solution Approach 1:
The system performs preliminary action by initiating acceleration before the lane change is complete. When a lane change is detected, the ACC system starts accelerating the host vehicle ahead of time, rather than waiting until the target vehicle is fully clear of the path. This preliminary acceleration reduces the overall time delay while maintaining safety through continuous monitoring of the target vehicle's position throughout the maneuver.
2Productivity
If the adaptive cruise control system accelerates immediately upon lane change initiation, then the productivity of the lane change maneuver is improved, but the risk of collision with the target vehicle increases
Solution Approach 1:
The system implements feedback by continuously monitoring the target vehicle's position and the host vehicle's path trajectory throughout the lane change maneuver. The ACC system uses this real-time feedback to dynamically adjust the acceleration profile, ensuring that acceleration is applied efficiently to improve productivity while simultaneously maintaining safety by responding to the current spatial relationship between vehicles.
Data Source
AI summary
A system and method are provided for operating an autonomous or semi-autonomous host vehicle. The method includes receiving data measured from a plurality of sensors, wherein the measured data relates to one or more target vehicles in the host vehicle's field of view, calculating a desired speed command based on a driver-selected set-speed and the measured data, detecting initiation of a host vehicle lane change to a desired adjacent lane, and in response to initiation of the lane change, selecting an acceleration profile based on at least one set of operating conditions, calculating a modified speed command by adjusting the desired speed command according to the selected acceleration profile; and controlling a host vehicle speed based on the modified speed command.