Vehicle Unparking Control System with Directional Decision Logic
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Solution Overview
Problem
Conventional automatic parking assist systems increase the number of unparking control steps, leading to potential curb contact and slower unparking processes, especially when navigating narrow parking spaces with limited visibility of obstacles.
Innovation Solution
An unparking control system that measures distances from front and rear objects to determine the initial unparking direction and generates steering control signals to adjust the vehicle's steering angle, reducing the number of control steps through a Smart Parking Assist System (SPAS) that includes a parking control device and an electronic control steering device connected via cables, with a decision unit to set SPAS mode values for forward or backward unparking and provide steering control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional automatic parking assist system performs backward control with steering, then the vehicle can unpark from narrow spaces, but the curb contact risk increases and damage occurs
Solution Approach 1:
The patent inverts the conventional unparking approach by performing forward control instead of backward control. The system determines an initial unparking direction based on distance measurements, and when the front distance exceeds a reference distance, it selects forward gear and performs forward steering control to exit the parking space, thereby avoiding curb contact that occurs during backward steering movements
Solution Approach 2:
The system uses the vehicle's own distance measurement capability to autonomously determine the safe unparking direction and execute the appropriate control sequence without external assistance, selecting forward or backward control based on real-time sensor data
2Object-affected harmful factors
If the conventional automatic parking assist system moves backward straightly without steering, then curb contact is avoided, but the number of unparking control steps increases and unparking speed decreases
Solution Approach 1:
The patent implements dynamic control by adaptively selecting between forward and backward control modes based on real-time distance measurements. The system dynamically adjusts the unparking strategy: when front distance is sufficient, it uses efficient forward control with steering; when front distance is insufficient, it uses backward control. This dynamic adaptation optimizes both safety and speed
Solution Approach 2:
The system changes the control parameters (direction, steering angle, gear selection) based on the measured distance parameters. By monitoring the front distance parameter and comparing it against a reference distance, the system switches between different control modes to achieve optimal unparking performance
3Ease of operation
If the vehicle is equipped with automatic parking assist system, then parking in narrow spaces becomes possible, but the system complexity increases
Solution Approach 1:
The patent makes the existing distance measurement unit and steering control device perform multiple functions: the distance measurement unit is used for both parking and unparking decisions, and the steering control device executes both parking and unparking maneuvers. The same hardware infrastructure supports bidirectional control (forward and backward) based on distance measurements, reducing the need for additional specialized components
Data Source
AI summary
Provided is an unparking control system capable of unparking a vehicle from a parking space safely, conveniently and quickly through a reduced number of unparking control steps, and an unparking control method using the same. The unparking control system includes: a parking control device configured to measure distances from front and rear objects positioned around a vehicle, determine an initial unparking direction and whether to perform steering control according to whether a front distance among the measured distances exceeds a preset reference distance, and generate and provide a steering control signal based on the determined initial unparking direction and whether to perform steering control; and an electronic control steering device configured to adjust a steering angle according to the steering control signal provided by the parking control device.