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Testing accelerometer rectification error caused by multidimensional composite inputs with double turntable

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|January 3, 2015
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Summary
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This study introduces a new method to measure accelerometer rectification error under combined constant acceleration and vibration. The findings reveal a linear relationship between constant acceleration and rectification error, crucial for accurate inertial navigation systems.

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Area of Science:

  • Inertial Navigation Systems
  • Sensor Metrology
  • Mechanical Engineering

Background:

  • Rectification error is a key performance metric for inertial accelerometers.
  • Operational environments expose accelerometers to complex, multi-axial inputs.
  • Existing evaluation methods for rectification error are limited to one-dimensional vibration.

Purpose of the Study:

  • To investigate accelerometer rectification error under simultaneous constant acceleration and vibration.
  • To develop and validate a novel testing methodology for composite acceleration inputs.
  • To analyze the characteristics of rectification error in realistic operational scenarios.

Main Methods:

  • Utilized a double turntable centrifuge (DTC) to generate combined constant acceleration and vibration.
  • Derived a theoretical model for rectification error based on DTC output and accelerometer static model.
  • Conducted experiments varying constant acceleration, vibration frequency, and amplitude.

Main Results:

  • Demonstrated the distinct characteristics of rectification error under composite accelerations.
  • Validated the theoretical model with experimental data.
  • Established a proven linear relationship between constant acceleration and rectification error.

Conclusions:

  • The developed DTC method effectively simulates composite acceleration environments for accelerometer testing.
  • The findings provide a more accurate understanding of accelerometer performance in operational conditions.
  • This research offers a valuable reference for characterizing accelerometers subjected to multiple simultaneous inputs.