Parking Assist Speed Control for Smooth Ride Comfort
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing parking assist systems often result in uncomfortable ride conditions due to frequent switching between acceleration and deceleration states during parking operations, which can lower passenger comfort and the smoothness of the parking process.
Innovation Solution
A parking assist apparatus that includes a distance obtaining portion, a vehicle speed calculating portion, a position calculating portion, and a controller to determine the target vehicle speed and movement target position, allowing for smooth vehicle movement to the parking target position by controlling the vehicle's running state with pre-set acceleration and deceleration values, thereby minimizing excessive acceleration and deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sequential control of driving force and braking force is used to follow the calculated movement path, then the vehicle can reach the parking target position, but frequent switching between acceleration and deceleration states occurs which lowers ride comfortability
Solution Approach 1:
The system calculates the entire movement path and identifies all acceleration and deceleration points in advance before execution. By pre-planning the speed profile and identifying where speed changes are needed, the system can smooth transitions and avoid abrupt switching between acceleration and deceleration states, thereby improving ride comfortability while maintaining positioning accuracy to the parking target position
Solution Approach 2:
The system dynamically adjusts speed control parameters during parking assist operation. By modifying acceleration and deceleration rates based on real-time vehicle state and path requirements, the system optimizes the balance between reaching the target position accurately and maintaining smooth, comfortable speed transitions for passengers
Data Source
AI summary
A parking assist apparatus includes: a distance obtaining portion that obtains a movement distance from a current position of a vehicle to a parking target position; a vehicle speed calculating portion that calculates a target vehicle speed with a lapse of time until the vehicle reaches the parking target position, based on the movement distance, and a vehicle speed and acceleration and deceleration which are set in advance; a position calculating portion that calculates a movement target position of the vehicle in accordance with the time until the vehicle reaches the parking target position, based on the target vehicle speed with the lapse of time; and a controller that controls a vehicle running state such that the vehicle is moved to the movement target position at the target vehicle speed.