Parking Route Segmentation for Precise Automatic Steering
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Solution Overview
Problem
Existing vehicle parking assistance technologies face difficulties in maximizing steering performance and precision when parking in narrow spaces, as they do not effectively utilize the vehicle's steering capabilities and are inflexible in correcting deviations during the parking process.
Innovation Solution
A vehicle controller that automatically operates the steering device by generating a first route to a temporary target position and a second route from a designated position, allowing for precise parking by updating the target position and adjusting the route accordingly to prevent interference with obstacles, thereby optimizing the parking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parking route with a turning radius larger than the minimum turning radius is used to allow for position deviations, then the flexibility in resetting the travelling locus is improved, but the steering performance of the vehicle is not utilized at maximum making it difficult to park in narrow spaces
Solution Approach 1:
The parking route is divided into two distinct segments: a first route from the current position to a temporary target position, and a second route from the temporary target position to the final target position. This segmentation allows the vehicle to first reach a safe intermediate position with adequate turning radius, then execute a precise final approach to the target position, thereby resolving the contradiction between flexibility and parking space efficiency
Solution Approach 2:
The temporary target position is determined in advance by laterally moving the final target position toward the inside of the parking route in the turning direction. This preliminary action creates an intermediate goal that ensures adequate turning radius while maintaining the ability to reach the final target position, thus utilizing maximum steering performance without sacrificing flexibility
2Device complexity
If the target position is fixed at the initial stage, then the route generation is simplified, but the parking route cannot be corrected if the target position or vehicle position deviates
Solution Approach 1:
The system continuously monitors the actual vehicle position and compares it with the planned parking route. When deviations are detected, the system automatically adjusts the route by recalculating the temporary target position and generating corrected first and second routes, ensuring the vehicle can reliably reach the target position even when deviations occur
Solution Approach 2:
The parking route is designed to be dynamic rather than fixed. The temporary target position and the division between first and second routes can be adjusted based on real-time vehicle position and target position deviations, allowing the system to adapt to changing conditions while maintaining parking accuracy
Data Source
AI summary
A vehicle controller includes a target position recognition unit configured to recognize a target position, a parking route generation unit configured to generate a parking route, and an automatic steering unit configured to automatically operate a steering device. The parking route generation unit generates a first route and a second route. The first route is a parking route to a temporary target position that is obtained by laterally moving the target position toward inside of the parking route in a turning direction. The second route is a parking route to the target position from a designated position in the middle of the first route. The automatic steering unit automatically operates the steering device to cause the subject vehicle to follow the first route until the subject vehicle reaches the designated position and to follow the second route from the designated position until the subject vehicle reaches the target position.