Lane Change Speed Control Under Minimum Safe Speed
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Solution Overview
Problem
Existing lane change control systems pose safety risks when a vehicle's driving speed is lower than the minimum operation speed, necessitating a control strategy to accelerate the vehicle to this speed for safe lane changes.
Innovation Solution
An apparatus and method that calculates a minimum operation speed for lane change control, adjusting vehicle speed and steering based on sensor data and driver input, using a control circuit to ensure the vehicle accelerates to or above this speed before initiating lane changes, and employs strategies to manage speed and collision probability with preceding vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lane change control is performed at low driving speed, then lane change operation can be executed, but driver safety is compromised and collision risk increases
Solution Approach 1:
The system performs preliminary acceleration before executing the lane change maneuver. When the current speed is below the minimum operation speed, the controller first accelerates the vehicle to reach the minimum operation speed, then proceeds with the lane change control. This preliminary action ensures that the lane change is only executed when safety conditions are met.
Solution Approach 2:
The system dynamically adjusts the lane change execution decision based on real-time speed conditions. The controller continuously monitors the current speed and compares it with the minimum operation speed, making dynamic decisions about whether to execute, delay, or accelerate before lane change. This dynamic adaptation resolves the contradiction by making lane change available when safe and restricting it when unsafe.
2Reliability
If the vehicle accelerates to minimum operation speed before lane change, then driver safety is improved, but additional time is required for speed adjustment
Solution Approach 1:
The system applies partial acceleration only when necessary - specifically when the current speed is below the minimum operation speed. If the speed is already sufficient, no acceleration is performed and the lane change proceeds immediately. This partial action approach minimizes time loss while ensuring safety requirements are met.
Solution Approach 2:
The controller continuously monitors the current speed and uses this feedback to decide whether acceleration is needed. The feedback loop compares real-time speed data with the minimum operation speed threshold, enabling the system to make informed decisions about whether to initiate acceleration or proceed directly with lane change, thus optimizing the time-safety tradeoff.
3Object-affected harmful factors
If the system restricts lane change to minimum operation speed or higher, then collision risk with preceding vehicles is reduced, but lane change flexibility is limited
Solution Approach 1:
The system changes the operational parameter (minimum operation speed) based on the driving conditions and vehicle state. By establishing a speed threshold parameter, the system adapts the lane change capability to current conditions, allowing flexible operation when conditions permit while restricting operation when safety concerns exist. This parameter-based adaptation resolves the contradiction between safety and flexibility.
Data Source
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AI summary
An apparatus for controlling a lane change in a vehicle includes: a sensor to sense an external vehicle, an input device to receive a lane change command from a driver of the vehicle, and a control circuit to be electrically connected with the sensor and the input device. The control circuit may receive the lane change command using the input device, calculate a minimum operation speed of the vehicle for a lane change control, and determine whether to accelerate the vehicle based on a speed of a preceding vehicle which is traveling on the same lane as the vehicle, when a driving speed of the vehicle is lower than the minimum operation speed.