Rear-Wheel Steering Control for Precise Parking Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current steering control systems for vehicles fail to assist in parking at a predetermined position in the parking width direction, leading to difficulties in accurately positioning the vehicle within the parking space.
Innovation Solution
A steering control device that outputs instructions to the rear-wheel steering system based on parking position information, using external world recognition sensors and a microprocessor unit to predict and correct the vehicle's path, ensuring the rear portion of the vehicle is positioned at the center of the parking space through rear-wheel steering adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If steering control switches between anti-phase steering and in-phase steering based on whether the vehicle is parallel to the parking frame, then operability during parking is improved, but the vehicle cannot be easily parked at a predetermined position in the parking width direction
Solution Approach 1:
The steering control device calculates a steered angle instruction for the rear wheels based on the lateral offset between the vehicle's travel direction and the desired parking position, creating a feedback control system that continuously adjusts rear wheel steering to maintain accurate positioning throughout the parking maneuver
Solution Approach 2:
The control system dynamically switches between different steering modes (anti-phase and in-phase) and continuously adjusts the rear wheel steered angle based on real-time vehicle state and parking position requirements, making the steering characteristics adaptable to different parking stages rather than fixed
2Adaptability or versatility
If anti-phase steering is used to facilitate direction change, then maneuverability is improved, but control precision for positioning at predetermined location is reduced
Solution Approach 1:
The system dynamically adjusts rear wheel steering based on the calculated steered angle instruction that considers both the need for direction change and the requirement for positioning precision, transitioning smoothly between maneuvering and positioning phases
Solution Approach 2:
The control system changes the rear wheel steered angle parameter continuously based on the lateral offset calculation, adjusting the steering intensity and direction to achieve both maneuverability and positioning accuracy at different stages of the parking maneuver
Data Source
AI summary
A steering control device according to the present invention is configured to obtain information on a parking position of a vehicle obtained by an external world recognition unit, and to output, based on the obtained information on the parking position, an instruction for moving a rear portion of the vehicle to a set position in a parking width direction to a rear-wheel steering device configured to control a steered angle of rear wheels of the vehicle. With this configuration, even when a timing or an angle for operating a steering wheel by a driver is not appropriate, or even when a steered angle of front wheels is limited, parking of the vehicle at the predetermined position in the parking width direction is facilitated.