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High-Acceleration Vibration Calibration System Based on Phase-Locked Resonance Control.

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Accurate calibration of high-acceleration vibration sensors is crucial. A new phase-locked resonance tracking control method ensures precise calibration by quickly adapting to changing resonance frequencies, improving sensor accuracy and stability.

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Area of Science:

  • Mechanical Engineering
  • Sensor Technology
  • Control Systems

Background:

  • High-acceleration vibration sensors require accurate calibration for engineering applications.
  • Existing calibration systems face challenges due to nonlinear factors affecting resonance frequency with increasing amplitude.

Purpose of the Study:

  • To develop a novel phase-locked resonance tracking control method for high-acceleration vibration calibration.
  • To enhance the accuracy and stability of resonance control in vibration calibration systems.

Main Methods:

  • Utilizing the phase resonance principle to track the resonant frequency of a resonant beam.
  • Implementing phase-locking to achieve stable vibration at high amplitudes exceeding 7500 m/s².

Main Results:

  • The proposed method enables stable vibration with amplitudes from 500-10,000 m/s² across 80-4000 Hz.
  • Achieved an acceleration stability control index of less than 0.5% and resonance tracking time under 0.1 s.
  • Outperformed the amplitude iteration amplification method in comparative experiments.

Conclusions:

  • The phase-locked resonance tracking control method significantly improves the accuracy and stability of high-acceleration vibration calibration.
  • This technique provides a reliable solution for calibrating sensors used in demanding engineering applications.
  • The developed system offers a wider operational range and faster tracking compared to conventional methods.