Vehicle Trajectory Tracking Control for Lane Deviation Prevention
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Solution Overview
Problem
Existing vehicle support systems fail to accurately control a driver's own vehicle when a preceding vehicle undergoes a lane deviation, leading to potential unnecessary lane deviations during trajectory tracking control and lack of recognition of lane markings.
Innovation Solution
A driving support device equipped with a preceding vehicle recognizing unit and a trajectory tracking control unit that predicts and prevents following a preceding vehicle's trajectory if it moves in a transverse direction, using a lane marking recognizing unit and an imaginary line setting unit to ensure accurate recognition and avoidance of lane deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If trajectory tracking control is carried out when lane markings cannot be recognized, then the driver's own vehicle can follow the preceding vehicle, but the driver's own vehicle makes unnecessary lane deviations
Solution Approach 1:
The system performs preliminary detection of transverse movement of the preceding vehicle before initiating trajectory tracking control. By detecting movement in the vehicle transverse direction ahead of time, the system predicts lane deviation and prevents unnecessary trajectory tracking, thereby avoiding harmful lane deviations while maintaining the capability to track when appropriate
Solution Approach 2:
The system continuously monitors the position and movement of the preceding vehicle, using this feedback to determine whether to activate or deactivate trajectory tracking control. When transverse movement is detected, feedback signals prevent trajectory tracking; when the vehicle returns to normal positioning, feedback enables tracking again, creating a dynamic control system that adapts to real-time conditions
2Measurement precision
If lane maintenance control is carried out based on lane markings, then the driver's own vehicle can maintain lane position, but the system cannot recognize lane markings when the preceding vehicle straddles over them
Solution Approach 1:
The system performs preliminary detection of transverse movement of the preceding vehicle before lane markings become obscured. By detecting movement in the vehicle transverse direction in advance, the system predicts that lane markings will soon be unrecognized and proactively switches control modes or adjusts parameters to maintain lane position recognition capability
Solution Approach 2:
The system uses the detected transverse movement of the preceding vehicle as an intermediary indicator to infer the state of lane marking recognition. Instead of directly detecting obscured lane markings, the system uses the preceding vehicle's movement as a proxy signal to anticipate and compensate for the loss of lane marking information
Data Source
AI summary
A trajectory tracking control unit carries out a trajectory tracking control in the event that a predetermined condition is satisfied. On the other hand, in the case that a preceding vehicle recognizing unit detects that a preceding vehicle has moved in a vehicle transverse direction, the trajectory tracking control unit predicts that the preceding vehicle will depart from a lane in which it is traveling. Therefore, even if the predetermined condition is satisfied after the preceding vehicle recognizing unit has detected that the preceding vehicle has moved in the vehicle transverse direction, the trajectory tracking control unit does not cause the driver's own vehicle to follow the trajectory of the preceding vehicle.