Vehicle Stability Control Using RFID Tire Data
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Solution Overview
Problem
Conventional electronic stability control systems are designed around a nominal tire design and fail to adapt to the specific characteristics of various tire types, leading to suboptimal vehicle handling when non-standard tires are used.
Innovation Solution
The system incorporates RFID tags on tires to encode static tire parameters such as rolling radius and cornering stiffness, which are transmitted to an electronic control unit to modify the stability control operations, allowing the system to adapt to the specific tires installed, even aftermarket ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electronic stability control system is designed around a nominal tire design, then the system structure remains simple and standardized, but the system cannot adapt to different tire characteristics leading to suboptimal vehicle handling
Solution Approach 1:
The patent applies preliminary action by encoding static tire parameters (rolling radius, cornering stiffness) into RFID tags before the tires are mounted on the vehicle. This pre-stored information is automatically read by the stability control system, eliminating the need for complex real-time measurements and enabling immediate adaptation to the specific tire characteristics without increasing system complexity
Solution Approach 2:
The patent introduces RFID tags as an intermediary carrier that stores and transmits tire characteristic data. This intermediary solution bridges the gap between diverse tire types and the stability control system, allowing the system to adapt to different tires through simple data reading rather than complex sensing and identification mechanisms
2Loss of information
If RFID tags are added to tires to store static parameters, then the system can identify and adapt to specific tire characteristics, but the device complexity increases due to additional components
Solution Approach 1:
The patent extracts the tire identification and parameter storage function from the stability control system itself and places it into separate RFID tags attached to the tires. This extraction allows the stability control system to remain relatively simple while gaining the ability to access detailed tire parameters through the external RFID tags, which handle all information storage and transmission functions
3Measurement precision
If the stability control system uses standard sensors to measure dynamic characteristics, then the measurement system remains simple, but the control accuracy deteriorates when non-standard tires are used
Solution Approach 1:
The patent applies parameter changes by using the static tire parameters from RFID tags (rolling radius, cornering stiffness) to dynamically adjust the interpretation and calibration of sensor measurements. This allows the system to maintain accurate vehicle state estimation across different tire types by adapting the measurement parameters based on the specific tire characteristics rather than requiring completely different sensors for each tire type
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This adaptation enhances vehicle stability and handling by providing tailored control responses based on the actual tire characteristics, improving performance compared to systems without this adaptation.
Implementation Method 1
RFID is an electronic identification method in which data is stored, and can be remotely retrieved from devices called RFID tags or transponders. RFID tags contain silicon chips and antennas to enable them to receive and respond to radio-frequency queries from an RFID transceiver.
Data Source
AI summary
A system for and a method of controlling the stability of a vehicle includes an electronic control system controlling a vehicle stability control subsystem based at least in part on static tire data received by the electronic control unit.