Lane Departure Prevention Control System Cant Slope Correction
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Solution Overview
Problem
Existing lane departure prevention systems struggle to accurately predict and prevent lane departures when transverse disturbances like cants are present, leading to control errors and an inconsistent driving experience for the driver.
Innovation Solution
A lane departure prevention control system that includes a lane detector, disturbance information detector, correction module, departure predictor, and target turn amount generator, which calculates and applies a target turn amount to maintain an optimal path by correcting the position information of the departure determination line based on detected disturbances, such as cants, lane width, and lane shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the vehicle travels on a cant slope without correcting the departure determination line, then the system structure remains simple, but the lane departure prediction accuracy deteriorates due to transverse disturbance
Solution Approach 1:
The patent changes the reference parameter for lane departure determination by correcting the position of the departure determination line based on detected cant angle. The correction amount is calculated as a function of the cant angle, thereby adapting the determination criterion to the actual road condition and improving prediction accuracy without adding complex hardware
2Reliability
If the departure prevention control starts earlier to account for cant, then the lane departure prevention reliability improves, but the driver experiences a sense of incongruity due to altered traveling path
Solution Approach 1:
The patent changes the spatial parameter of the departure determination line by positioning it at a corrected location that accounts for the vehicle's tendency to drift on cant slopes. This allows the control to start at the appropriate moment while maintaining a natural-looking traveling path that aligns with driver expectations
3Reliability
If the vehicle follows the natural traveling path on cant slope, then the driving behavior remains natural, but the lane departure prevention effectiveness deteriorates due to outer track travel on down-slope
Solution Approach 1:
The patent applies preliminary correction to the departure determination line position before lane departure occurs. By anticipating the vehicle's drift tendency on cant slopes and adjusting the reference line accordingly, the system proactively compensates for the gravitational effect, ensuring the vehicle stays on the intended path without requiring corrective steering actions
Data Source
AI summary
A lane departure prevention control system for a vehicle includes: a lane detector that detects a lane on which the vehicle travels; a disturbance information detector that detects information on disturbance applied to the vehicle; a correction module that corrects position information of a departure determination line used for determining whether the vehicle departs from the lane, based on at least the information on the disturbance applied to the vehicle; a departure predictor that makes a prediction of departure from the lane, based on position information on the departure determination line and a travelling state, the position information being corrected by the correction module; a target turn amount calculator that calculates a target turn amount to be applied to the vehicle, required for preventing departure from the lane based on the prediction of the departure from the lane; and a target turn amount generator that generates the target turn amount.