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Flexible calorimetric flow sensor with unprecedented sensitivity and directional resolution for multiple flight

Zheng Gong1, Weicheng Di2, Yonggang Jiang3,4

  • 1School of Mechanical Engineering and Automation, Beihang University, Beijing, 100191, China.

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A novel calorimetric flow sensor accurately estimates micro air vehicle flight parameters like angle of attack and airflow velocity. This single sensor offers high resolution for improved flight control and weak airflow sensing applications.

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Area of Science:

  • Aerospace Engineering
  • Sensor Technology
  • Micro Air Vehicle (MAV) Systems

Background:

  • Accurate perception of flight parameters (angle of attack, sideslip, velocity) is critical for MAV flight control.
  • Conventional MAVs utilize sensor arrays, which can be complex and bulky.
  • Need for compact, high-resolution sensors for MAVs.

Purpose of the Study:

  • To introduce a single, flexible calorimetric flow sensor for estimating multiple flight parameters.
  • To demonstrate the sensor's capability in measuring angle of attack, angle of sideslip, and airflow velocity.
  • To explore applications in weak airflow sensing and MAV flight control.

Main Methods:

  • Development of a flexible calorimetric flow sensor with a suspended array of vanadium oxide thermistors.
  • Integration of the sensor onto a wing model for flight parameter estimation.
  • Utilizing high sensitivity and fast response for simultaneous measurement of various parameters.

Main Results:

  • Achieved unprecedented velocity resolution of 0.11 mm·s⁻¹ and angular resolution of 0.1°.
  • Successfully estimated angles of attack and sideslip simultaneously when attached to a wing model.
  • Demonstrated capability to estimate triaxial flight velocities and wing vibrations.

Conclusions:

  • The proposed single calorimetric flow sensor enables accurate estimation of multiple flight parameters for MAVs.
  • The sensor's high sensitivity and resolution are suitable for weak airflow sensing.
  • This technology holds significant promise for advancing MAV flight control systems.