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Addressed Fiber Bragg Structures in Load-Sensing Wheel Hub Bearings
Timur Agliullin1, Robert Gubaidullin1, Airat Sakhabutdinov1
1Department of Radiophotonics and Microwave Technologies, Kazan National Research Technical University named after A.N. Tupolev-KAI, 420111 Kazan, Russia.
Sensors (Basel, Switzerland)
|November 4, 2020
Summary
This study introduces fiber-optic sensors in load-sensing bearings to accurately estimate wheel forces. This enhances active safety systems for vehicles.
Area of Science:
- Automotive Engineering
- Sensor Technology
- Optical Metrology
Background:
- Accurate estimation of wheel loads is crucial for advanced automotive safety systems.
- Traditional methods for load sensing can be complex and costly.
- Fiber-optic sensors offer a promising alternative for in-situ load measurement.
Purpose of the Study:
- To develop and validate a load-sensing bearing system for automotive applications.
- To estimate longitudinal wheel forces using fiber-optic sensors.
- To improve the performance of active safety systems through accurate load data.
Main Methods:
- Instrumentation of load-sensing bearings with addressed fiber Bragg structure (AFBS) sensors.
- Development of a mathematical model for load-deformation relationships.
- Simulation of vehicle dynamics during split-mu braking tests and AFBS signal analysis.
Main Results:
- Simulation showed a 5.44% estimation error for longitudinal wheel force from a single measurement point.
- A prototype load-sensing bearing demonstrated comparable results to simulations in experimental braking tests.
- The system effectively converts strain data into frequency shifts for load calculation.
Conclusions:
- The proposed load-sensing bearing system, utilizing AFBS fiber-optic sensors, accurately estimates wheel loads.
- This technology can serve as critical input for enhancing active safety systems like automatic braking and adaptive cruise control.
- The system offers a viable solution for improving vehicle safety and driving automation.
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