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A Novel Method for Determining Angular Speed and Acceleration Using Sin-Cos Encoders.

Manuel Alcázar Vargas1, Javier Pérez Fernández1, Juan M Velasco García1

  • 1Department of Mechanical Engineering, University of Málaga, 29071 Málaga, Spain.

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Summary
This summary is machine-generated.

This study introduces a new, low-cost method using Savitzky-Golay filters and Sin-Cos encoders for accurate vehicle wheel speed and acceleration measurement. The technique excels in real-time applications, especially at lower speeds.

Keywords:
ABS encoderSavitzky-Golay filterSin-Cos encodervehicle control systemsvehicle sensorswheel angular speed

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Area of Science:

  • Automotive Engineering
  • Sensor Technology
  • Signal Processing

Background:

  • Accurate vehicle sensor data is crucial for advanced safety systems.
  • Wheel speed is a critical parameter for functions like ABS and ESC.
  • Existing methods may have limitations in accuracy or computational cost.

Purpose of the Study:

  • To develop a novel, computationally efficient method for precise wheel speed and acceleration estimation.
  • To leverage Sin-Cos encoders and Savitzky-Golay filters for improved sensor signal processing.
  • To enhance the reliability of vehicle safety systems through accurate wheel speed data.

Main Methods:

  • Utilizing Sin-Cos encoders to capture wheel rotation signals.
  • Applying Savitzky-Golay filters to precisely determine polynomial fits for sensor data and their derivatives.
  • Implementing a low-computational-cost algorithm for real-time processing.

Main Results:

  • The proposed method accurately estimates both wheel angular speed and acceleration.
  • Demonstrated superior performance compared to conventional approaches in simulations and real-world tests.
  • Achieved particularly high accuracy for medium and low wheel angular speeds.

Conclusions:

  • The new method offers a robust and efficient solution for accurate wheel speed measurement.
  • Its low computational demand makes it ideal for real-time automotive safety applications.
  • Significant improvements in accuracy, especially at lower speeds, enhance vehicle safety system performance.