Parking Support Apparatus Obliqueness Correction Path
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Solution Overview
Problem
Existing parking support apparatuses face challenges in preventing contact between a vehicle performing a three-point-turn and adjacent objects, especially when the vehicle does not stop at the center of the parking space or when the vehicle and parking space dimensions are not parallel, leading to potential collisions during the maneuver.
Innovation Solution
A parking support apparatus that includes a host vehicle positional information acquisition unit, an obliqueness calculation unit, an obliqueness correction path calculation unit, and a centering path calculation unit, which together guide the vehicle to correct its position within the parking space without colliding with surrounding objects by calculating and executing specific paths to align the vehicle with the parking space's center, even if initially misaligned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If steering control is simultaneously performed as the vehicle travels forward from an initial position, then the vehicle can reach the expected position faster, but the vehicle may come into contact with vehicles parked in adjacent parking spaces
Solution Approach 1:
The patent divides the parking maneuver into two distinct phases: first performing a three-point-turn to reposition the vehicle away from adjacent parking spaces, then executing a separate steering control to align the vehicle with the parking space. This segmentation allows each phase to be optimized independently, preventing contact with adjacent vehicles while still achieving efficient parking.
Solution Approach 2:
The patent performs the three-point-turn as a preliminary action before the main steering control. By first repositioning the vehicle through the three-point-turn maneuver, the system creates a safe initial position that prevents contact with adjacent vehicles during the subsequent steering phase, while still enabling the vehicle to reach the expected position efficiently.
2Adaptability or versatility
If the vehicle does not stop at the central portion of the parking space or is not parallel to the parking space, then the vehicle can stop at various positions, but the vehicle may come into contact with surrounding objects during three-point-turn
Solution Approach 1:
The patent calculates the obliqueness between the vehicle's current position/orientation and the ideal parking position, then uses this feedback information to determine the appropriate three-point-turn path. This feedback mechanism allows the system to adapt to various initial stopping positions while automatically adjusting the maneuver to avoid contact with surrounding objects.
Solution Approach 2:
The patent changes the steering angle parameter during the three-point-turn maneuver based on the calculated obliqueness. By dynamically adjusting the steering angle according to the vehicle's initial position and orientation, the system can handle diverse stopping scenarios while maintaining safety margins from surrounding objects.
3Object-affected harmful factors
If the amount of steering is minimized to prevent contact with adjacent vehicles, then contact is avoided, but it takes more time to move the vehicle to the expected position
Solution Approach 1:
The patent segments the parking maneuver into two phases with different steering characteristics: the three-point-turn phase uses larger steering angles to quickly reposition the vehicle, while the subsequent alignment phase uses smaller steering angles to precisely position the vehicle without contact. This segmentation allows the system to minimize overall time while preventing contact.
Solution Approach 2:
The patent employs periodic steering adjustments during the maneuver, alternating between larger steering inputs during the three-point-turn phase and smaller adjustments during the alignment phase. This periodic pattern of steering magnitude allows efficient repositioning followed by precise positioning, reducing total time while preventing contact.
Data Source
AI summary
A parking support apparatus includes: a host vehicle positional information acquisition unit acquiring host vehicle positional information indicating a current position of a vehicle; an obliqueness calculation unit calculating obliqueness between a vehicle length direction and a longitudinal direction of the parking space, based on the host vehicle positional information; an obliqueness correction path calculation unit calculating an obliqueness correction path along which a position of the vehicle reaches a front end of the parking space, based on the obliqueness when the vehicle travels forward from a stop position at a steering angle; and a centering path calculation unit calculating a centering path which has a width at a central portion of the parking space in a width direction and along which the vehicle travels forward toward a central region set in the longitudinal direction, after a position of the vehicle reaches the front end of the parking space.