Parking Path Selection for Fewer Maneuvers and Better Ride Quality
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Solution Overview
Problem
Existing parking assist systems often result in large left-and-right steering angles and numerous back-and-forth maneuvers, compromising ride quality and passenger comfort, especially when only one parking frame is obtained.
Innovation Solution
A parking assist apparatus that includes a peripheral recognition unit, a parking area detection unit, a parking path calculation unit, and a parking path selection unit, which calculate and select parking paths with the minimum number of direction changes and the largest radius of curvature, optimizing the parking path to reduce external forces on passengers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a parking path is selected based on minimum back-and-forth maneuvers, then the number of direction changes is reduced, but the radius of curvature becomes small causing poor ride quality
Solution Approach 1:
The patent changes the selection parameters from only minimizing back-and-forth maneuvers to a dual-parameter system that simultaneously considers both the number of direction changes and the radius of curvature. By introducing radius of curvature as a second selection criterion, the system can choose paths that balance operational efficiency with passenger comfort, resolving the contradiction between reducing maneuvers and maintaining ride quality.
2Object-affected harmful factors
If the radius of curvature is increased to improve ride quality, then passenger comfort improves, but the number of back-and-forth maneuvers increases
Solution Approach 1:
The system modifies the path selection parameters by introducing radius of curvature as a primary selection criterion alongside the number of direction changes. This dual-parameter approach allows the system to identify paths that achieve adequate ride quality without excessively increasing the number of maneuvers, optimally balancing both requirements.
3Device complexity
If only one parking frame is obtained, then the parking path calculation is simplified, but the steering angle becomes large causing poor ride quality
Solution Approach 1:
The patent introduces radius of curvature as an additional selection parameter that directly addresses large steering angles. When only one parking frame is available, the system evaluates the resulting path's radius of curvature and can determine whether to proceed with that path or request additional frame detection, thereby controlling steering angles and maintaining ride quality without significantly increasing calculation complexity.
Data Source
AI summary
A parking assist apparatus uses vehicle information and the recognition result of a peripheral recognition unit to calculate a plurality of patterns of parking paths, in which the radius of curvature of each of the arcs included in the parking paths is differentiated, as parking paths to park a vehicle at a parking area, by a parking path calculation unit. In addition, the parking assist apparatus selects, among the plurality patterns of parking paths, a parking path with both a minimum number of times of driving operations for changing an advancing direction of the vehicle from forward to reverse or reverse to forward, and the radius of curvature of the arc that is largest, by a parking path selection unit.