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Sensitivity-Compensated Micro-Pressure Flexible Sensor for Aerospace Vehicle.

Xiaozhou Lü1, Jianan Jiang2, Hui Wang3

  • 1The School of Aerospace Science and Technology, Xidian University, Xi'an 710071, China. lxz@uw.edu.

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Summary

This study introduces a novel flexible sensor to measure micro-pressure on flight vehicles, enhancing safety by detecting surface pressure changes. The sensor offers improved sensitivity and accuracy for aerospace applications.

Keywords:
aerospaceflexible sensormicro-pressure measurementsensitivity compensation

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Area of Science:

  • Aerospace Engineering
  • Materials Science
  • Sensor Technology

Background:

  • High-speed flight vehicles experience surface micro-pressure from thin air, potentially causing component deformation and accidents.
  • Existing sensors may lack the sensitivity and flexibility required for accurate micro-pressure measurement on complex vehicle surfaces.

Purpose of the Study:

  • To develop and validate a sensitivity-compensated micro-pressure flexible sensor for flight vehicles.
  • To enhance the safety and performance of aerospace vehicles through precise micro-pressure monitoring.

Main Methods:

  • Design and fabrication of a flexible sensor using hyper-elastic plastic and parallel plate capacitance.
  • Experimental characterization of the sensor's static response, sensitivity, linearity, hysteresis, and repeatability.
  • Comparison of sensor performance before and after implementing sensitivity compensation.

Main Results:

  • The compensated sensor achieved significantly higher sensitivity (80% and 141.38% increase) and linearity (51.7% and 13.1% improvement) across different pressure ranges (0-2 kPa and 2-6 kPa).
  • Excellent hysteresis (4.95%) and repeatability (2.38%) were demonstrated, indicating reliable performance.
  • The sensor effectively measures micro-pressure in the 0-6 kPa range with high flexibility.

Conclusions:

  • The sensitivity-compensated micro-pressure flexible sensor offers a promising solution for monitoring surface pressure on flight vehicles.
  • The developed sensor technology can enhance flight safety and vehicle integrity by providing accurate, real-time pressure data.
  • This innovation has potential applications in aerospace vehicles, satellites, and unmanned aerial vehicles.