Semi-Autonomous Parking Control via Steering Angle Classification
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Solution Overview
Problem
Existing parking assistance systems for motor vehicles are costly and complex, relying on multiple sensors and steering assistance equipment, which increases the financial burden on drivers in urban areas where parking spaces are scarce and difficult to maneuver.
Innovation Solution
A semi-automatic parking assistance method using a movement control member, such as a joystick, that detects and analyzes movement instructions to classify them into two modes: mode 1 for straightforward motion and mode 2 for 'sawtooth' maneuvers, allowing the vehicle to move automatically without driver action, with haptic feedback and adaptive intelligence for different drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors and steering assistance equipment are used for parking assistance, then parking assistance effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates unnecessary complex equipment from traditional parking assistance systems. Instead of using multiple sensors, cameras, and steering assistance devices, the invention uses only the existing movement control member (steering wheel) that drivers already have, removing extraneous components while maintaining parking assistance functionality
Solution Approach 2:
The system utilizes the driver's own existing steering input through the movement control member to perform parking maneuvers. The driver's natural steering actions are detected and processed by the control unit to automatically execute parking sequences, making the driver's existing actions serve the dual purpose of normal driving and automated parking
2Reliability
If multiple sensors and electronic processing systems are installed, then parking assistance effectiveness is improved, but cost increases
Solution Approach 1:
The movement control member (steering wheel) performs multiple functions: it serves as both the driver's normal steering interface and as the sensor input device for detecting parking maneuver intentions. This multi-functionality eliminates the need for separate dedicated sensors and reduces overall system cost
Solution Approach 2:
The driver's existing steering actions through the movement control member are repurposed to trigger and control automated parking sequences. The system uses the driver's own input actions to serve the additional function of automated parking control, eliminating need for separate control interfaces
3Adaptability or versatility
If the movement control member detects positions with angle β greater than βM, then the ability to perform complex sawtooth maneuvers is improved, but the maximum steering angle αM of steerable wheels becomes a limiting factor
Solution Approach 1:
The system dynamically adapts its behavior based on the detected angle β of the movement control member. When β exceeds βM, the system automatically switches from direct steering control to automated sawtooth maneuver sequences, dynamically adjusting the control strategy to match the driver's intent while working within the physical steering angle limitations
Solution Approach 2:
The system changes operational parameters based on the movement control member position. When the angle β is within normal range (≤βM), direct steering is applied; when β exceeds βM indicating a desire for complex maneuvers, the system transitions to automated sawtooth sequences with alternating longitudinal movements, changing the operational mode to achieve the desired parking trajectory
Data Source
AI summary
A method for assisting with the parking of a motor vehicle includes detecting the position of a movement-control member able to indicate a transverse component and a longitudinal component, with respect to the motor vehicle, of a movement instruction, and analyzing the movement instruction. The method also includes classifying the movement instruction in two modes (mode 1, mode 2) according to the angle β about the transverse axis of the movement-control member with respect to its rest position and the comparison thereof with the angel βM that brings the steered wheels of the motor vehicle to the angle αM of maximum steering lock, and moving the vehicle in accordance with the movement instruction mode, with mode 2 corresponding to assisted parking mode and performing a semi-automatic parallel-parking maneuver.