Vehicle Traveling Controller with Estimated Position Reliability
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Solution Overview
Problem
Existing vehicle traveling controllers face challenges in maintaining appropriate traveling control when lane line information and positioning information become undetectable, leading to difficulties in recognizing the traveling route and correcting the vehicle's position.
Innovation Solution
A traveling controller system that computes control information based on map information, calculates multiple estimated positions using various computing methods, and continues traveling control until estimated position reliability reaches a threshold, even when lane line and positioning information are undetectable, using previous correction values and kinetic states to maintain accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the traveling controller relies on lane line information and positioning information for traveling control, then the control accuracy is improved, but the system becomes unable to maintain traveling control when these information sources become undetectable
Solution Approach 1:
The system pre-calculates multiple estimated positions using various computing methods (dead reckoning, map matching, etc.) before the positioning information becomes unavailable. These estimated positions are prepared in advance and can be immediately utilized when lane line or positioning information is undetectable, ensuring continuous traveling control without interruption.
Solution Approach 2:
The system introduces estimated positions as an intermediary element between the primary positioning information and the traveling control system. When lane line information or positioning information becomes undetectable, these estimated positions serve as a substitute mediator to maintain the traveling control function, bridging the gap caused by missing information.
2Reliability
If the system uses multiple computing methods to calculate estimated positions, then the reliability of traveling control is improved, but the computational complexity increases
Solution Approach 1:
The system calculates multiple estimated positions using various computing methods, but not all methods are applied continuously. Instead, the system selectively applies different computing methods based on the availability of information sources. When positioning information is available, standard methods are used; when it becomes unavailable, alternative methods are activated, avoiding unnecessary computational overhead while maintaining reliability.
Solution Approach 2:
The system dynamically adjusts the computing methods and number of estimated positions calculated based on the current detection status of lane line information and positioning information. The computational effort varies dynamically with the operational context, increasing complexity only when necessary to maintain control reliability during information loss scenarios.
3Ease of operation
If the traveling control continues until estimated position reliability reaches a threshold, then the driver convenience is improved, but the risk of inaccurate control increases
Solution Approach 1:
The system continuously monitors and evaluates the reliability of estimated positions by comparing results from multiple computing methods. When the estimated position reliability falls below a predetermined threshold, the system provides feedback to discontinue traveling control, preventing inaccurate control while maximizing driver convenience during periods when alternative positioning methods remain reliable.
Data Source
AI summary
A traveling controller for vehicle includes a first computing unit, a traveling control unit, a first calculating unit, a second calculating unit, and a second computing unit. The first computing unit is configured to compute control information on a traveling control of an own vehicle. The traveling control unit is configured to perform the traveling control on the basis of the control information. The first calculating unit is configured to calculate estimated positions. The second calculating unit is configured to calculate estimated position reliability on the basis of pieces of positional information, including information on one or more estimated positions. The second computing unit is configured to compute the control information on the basis of one or more estimated positions when positioning information, lane line information, or both is undetectable. The traveling control unit is configured to continue the traveling control until the estimated position reliability becomes equal to or less than a threshold, when the positioning information, the lane line information, or both is undetectable.