Autonomous Parking Braking Control for Tighter Turning Radius
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Solution Overview
Problem
Conventional autonomous parking systems require large parking spaces and take a long time to complete due to their reliance on steering alone, resulting in inefficient use of space and prolonged parking/unparking times.
Innovation Solution
A braking control apparatus and method that applies biased braking pressure to vehicle wheels based on a pre-generated target route, allowing the vehicle to follow the route by determining whether the route satisfies conditions for initiating biased braking control and calculating the necessary braking pressure ratios for each wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional autonomous parking systems use steering control only, then the system is simple to operate, but the turning radius is large requiring wide parking spaces
Solution Approach 1:
The patent combines steering control and braking control into a unified autonomous parking system. The braking control apparatus works in conjunction with the steering apparatus to enable the vehicle to follow target routes with smaller turning radii, thereby reducing the parking space width required while maintaining system operability through integrated control algorithms.
Solution Approach 2:
The system dynamically adjusts braking pressure distribution across different wheels based on real-time vehicle state and target route requirements. The control unit calculates optimal braking forces for each wheel to achieve precise trajectory following, enabling the vehicle to adapt its turning behavior dynamically rather than relying on fixed steering angles alone.
2Loss of time
If conventional autonomous parking systems use steering control only, then the control algorithm is simple, but the parking time is prolonged
Solution Approach 1:
The braking control system operates continuously throughout the autonomous parking maneuver, providing ongoing adjustment of wheel braking forces to maintain optimal trajectory following. This continuous control enables the vehicle to efficiently complete parking and unparking operations without interruptions or suboptimal positioning corrections.
Solution Approach 2:
The control unit receives real-time feedback from sensors about vehicle position, orientation, and speed, then continuously calculates and adjusts the optimal braking pressure distribution. This closed-loop feedback mechanism enables the system to adapt to actual vehicle behavior and environmental conditions, optimizing parking time while ensuring precise route following.
3Length of moving object
If conventional autonomous parking systems use maximum steering angle, then the turning capability is maximized, but the turning radius remains large
Solution Approach 1:
The patent segments the braking control into individual wheel-level adjustments rather than applying uniform braking. By independently controlling braking pressure on each wheel, the system can create asymmetric braking forces that effectively reduce the turning radius without requiring extreme steering angles, thereby maintaining ease of operation while achieving tighter turns.
Solution Approach 2:
The system changes the braking pressure parameter distribution across different wheels based on the required turning direction and magnitude. By dynamically adjusting these parameters, the vehicle achieves smaller turning radii through optimized force distribution rather than relying solely on maximum steering input, maintaining operational simplicity.
Data Source
AI summary
A method and an apparatus for braking control for autonomous parking are disclosed. According to at least one embodiment, the present disclosure provides an apparatus for controlling braking of a vehicle to cause the vehicle to follow a target route generated in advance, including a biased braking control initiating unit configured to determine whether the target route satisfies a condition for initiating biased braking control, a biased braking amount determining unit configured to determine a ratio of a braking pressure to be applied to respective wheels of the vehicle based on the target route in response to determining that the target route satisfies the condition for initiating the biased braking control, and a control unit configured to perform braking control of the vehicle based on the ratio of the braking pressure.