Automated Valet Parking Speed Guard for Precise Final Stops
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Solution Overview
Problem
Existing automated valet parking systems face challenges in maintaining accurate vehicle stops at final destinations due to sudden changes in maximum speed near the end of the parking path, leading to potential inaccuracies in stopping at the intended location.
Innovation Solution
A system and method that apply an upper limit guard to the maximum speed of a vehicle's path points, determining if the distance to the path end point is within a guard threshold, and replacing the maximum speed with a minimum speed if the distance is too close to the end point, using a guard speed set in advance or the previous path's maximum speed, to ensure accurate stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the maximum speed is increased to shorten travel time to the final destination, then productivity is improved, but manufacturing precision deteriorates because accurate stop at the final destination becomes difficult
Solution Approach 1:
The maximum speed of path points is dynamically adjusted based on the vehicle's current position and distance to the final destination. As the vehicle approaches the destination, the system automatically reduces the maximum speed of subsequent path points to ensure accurate stopping, while allowing higher speeds during earlier portions of the journey to maintain productivity.
Solution Approach 2:
The system pre-calculates and sets appropriate maximum speeds for all path points before the vehicle begins its journey. By anticipating the need to slow down near the destination, the system prepares the speed profile in advance, allowing the vehicle to maintain higher speeds for longer periods while still ensuring accurate stopping at the final destination.
2Productivity
If the maximum speed is suddenly changed near the end of the traveling path, then productivity is improved by reducing overall travel time, but manufacturing precision deteriorates due to degradation in stop accuracy
Solution Approach 1:
Different maximum speeds are assigned to different portions of the traveling path based on local conditions. Path points closer to the final destination have lower maximum speeds, while path points farther away have higher maximum speeds. This localized speed adjustment allows the system to optimize for both speed and stopping accuracy in different regions of the journey.
Solution Approach 2:
The system changes the speed parameter of path points based on the vehicle's progress along the traveling path. As the vehicle moves forward, the maximum speed parameter of subsequent path points is adjusted according to the remaining distance to the destination, creating a smooth transition that maintains both productivity and stopping precision.
Data Source
AI summary
A system includes a management device configured to manage automated valet parking, and a control device configured to perform vehicle control for the automated valet parking. The vehicle control includes processing of applying an upper limit guard. The processing of applying the upper limit guard includes processing of determining whether or not a first distance from a target position of a target path point to a target position of a path end point is equal to or less than a guard threshold, and processing of replacing the maximum speed of the target path point by using a minimum speed between a guard speed and a maximum speed included in each of the plurality of path points included in a traveling path in a case where the first distance is determined to be equal to or less than the guard threshold.