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Addressed Fiber Bragg Structures in Load-Sensing Wheel Hub Bearings.

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This study introduces fiber-optic sensors in load-sensing bearings to accurately estimate wheel forces. This enhances active safety systems for vehicles.

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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.