Dynamic Brake Calibration via Yaw and Torque Feedback
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Solution Overview
Problem
Existing vehicle brake systems struggle to dynamically calibrate individual brake assemblies to compensate for mismatches in vehicle motion, loading variations, and pad wear, leading to instability and potential loss of control during braking.
Innovation Solution
A control system that calculates anticipated yaw, steering torque, and deceleration, compares these to actual values, and adjusts brake characteristic parameters in real-time to balance brake forces across wheels, ensuring proper braking distribution and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If brake characteristic parameters are fixed during manufacturing, then manufacturing precision is improved, but adaptability to varying vehicle conditions deteriorates
Solution Approach 1:
The patent implements dynamic brake calibration by continuously adjusting brake characteristic parameters during vehicle operation based on real-time sensor data. The system transitions from static manufacturing calibration to dynamic adaptive calibration, allowing brake forces to be automatically adjusted according to actual vehicle conditions including yaw rate, steering torque, and deceleration measurements.
Solution Approach 2:
The system employs feedback mechanisms where sensors continuously monitor vehicle motion parameters (yaw rate, steering torque, deceleration) and feed this information back to the control system. The controller compares actual vehicle response with expected performance and automatically adjusts brake characteristic parameters to eliminate discrepancies, creating a closed-loop adaptive calibration system.
2Manufacturing precision
If individual brake calibration is performed for each brake assembly, then manufacturing precision is improved, but device complexity and calibration time increase
Solution Approach 1:
The system enables self-calibration where the brake system automatically adjusts its own characteristic parameters during normal vehicle operation. No external calibration equipment or manual intervention is required - the vehicle's own sensors and control system perform the calibration function, eliminating the need for complex external calibration devices and reducing calibration time to zero.
Solution Approach 2:
The patent changes the approach from adjusting physical brake parameters during manufacturing to dynamically modifying control parameters (brake characteristic parameters) through software. This allows individual brake calibration without mechanical complexity, as adjustments are made through electronic parameter modification rather than physical component adjustment.
3Adaptability or versatility
If dynamic brake calibration is implemented, then adaptability to varying conditions is improved, but use of energy and computational resources increases
Solution Approach 1:
The system performs partial calibration actions by only adjusting brake parameters when deviations from expected vehicle behavior are detected. Rather than continuously modifying all brake parameters at full computational intensity, the system activates calibration only when yaw rate, steering torque, or deceleration measurements indicate a need for adjustment, reducing overall energy and computational consumption.
Data Source
AI summary
A control system for a vehicle having vehicle wheels comprises: brakes, wherein each of the brakes applies individual braking to a respective one of the vehicle wheels; memory storing brake characteristic parameters for controlling each of the brakes; and a processor configured to: calculate anticipated yaw, steering torque, and deceleration of the vehicle, associated with operation of the brakes; compare between the anticipated yaw and actual yaw of the vehicle, between the anticipated steering torque and actual steering torque of the vehicle, and between the anticipated deceleration and actual deceleration of the vehicle; and calibrate the brakes by adjusting the stored brake characteristic parameters of each of the brakes in response to a yaw difference between the anticipated yaw and the actual yaw, a steering torque difference between the anticipated steering torque and the actual steering torque, and a deceleration difference between the anticipated deceleration and the actual deceleration.