Brake-by-Wire Wheel Slip Control With Modular Corner Feedback
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Solution Overview
Problem
Conventional braking systems, including those with Brake-by-Wire technology, lack optimal methods for controlling wheel slip, limiting flexibility and optimization, and rely on empirical tuning techniques, which hinder performance and responsiveness.
Innovation Solution
A method and system for controlling wheel slip in a vehicle braking system with Brake-by-Wire technology that configures control modes based on wheel and vehicle status evaluations, using a modular architecture with centralized or decentralized electronic control units to optimize responsiveness and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional braking systems with discrete-cycle control algorithms are used, then the system structure is relatively simple, but the wheel slip control optimization and flexibility are limited
Solution Approach 1:
The patent divides the braking system into independent corner control modules, where each corner (wheel) has its own control unit that can operate autonomously. This segmentation allows each corner to be optimized independently for wheel slip control while maintaining overall system simplicity through modular architecture.
Solution Approach 2:
The patent implements dynamic control modes that can switch between different operating states (e.g., traction control mode, braking mode, release mode) based on real-time wheel slip conditions. This dynamic adaptation enables the system to optimize performance for varying driving conditions without requiring a completely complex reconfiguration.
2Productivity
If Brake-by-Wire technology with electro-mechanical actuators is implemented, then continuous force modulation capability is improved, but the responsiveness and performance of wheel slip control are not optimized
Solution Approach 1:
The patent implements closed-loop feedback control where wheel speed sensors continuously monitor actual wheel rotation, and this information is fed back to the control unit which adjusts the actuator force in real-time. This feedback mechanism optimizes responsiveness by continuously adapting the braking force to maintain desired slip ratios, while the configurable control modes provide versatility for different driving scenarios.
Solution Approach 2:
The patent allows dynamic adjustment of control parameters (such as target slip ratio, control gains, and threshold values) based on operating conditions like vehicle speed, road surface, and braking intensity. This parameter adaptability optimizes performance across different scenarios while maintaining a relatively simple base architecture.
3Productivity
If empirical tuning techniques are used for braking control, then the implementation is straightforward, but the overall performance and responsiveness are limited
Solution Approach 1:
The patent implements self-adjusting control algorithms that automatically adapt to vehicle characteristics and operating conditions without requiring extensive manual calibration. The system performs self-diagnosis and parameter optimization based on sensor data, reducing the need for empirical tuning while maintaining high performance and responsiveness.
Data Source
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AI summary
A method (500) for controlling the wheel slip in a braking system of a vehicle, comprising steps of: receiving (501), by an input interface module of a slip control module, information representative of the vehicle and information representative of an estimate of the status of the vehicle; outputting (502), by the input interface module, input wheel slip control information; determining (503), by a parameter self-loading module of the input interface module, based on the information representative of the vehicle and the information representative of the status of the vehicle, wheel slip control parameters; determining (505), by a plurality of wheel slip control enabling modules of the slip control module, a plurality of enabling signals of the wheel slip control, based on the received input wheel slip control information and the received wheel slip control parameters; determining (506), by each closed-loop wheel slip control module of a plurality of closed-loop wheel slip control modules of the slip control module, based on a defined slip setpoint and an estimated wheel slip value, a setpoint value of a control variable to be applied to the respective vehicle corner, to minimize the error between the defined slip setpoint and the estimated wheel slip.