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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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Aircraft aerodynamic parameter detection using micro hot-film flow sensor array and BP neural network identification.

Ruiyi Que¹, Rong Zhu

¹State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China. katykob@163.com

Sensors (Basel, Switzerland)

|November 1, 2012

Summary

A new method uses micro hot-film sensors on wings to measure aircraft speed and angles. This approach is practical for small aircraft where traditional sensors are too large.

Keywords:

BP neural network aerodynamic parameters hot-film flow sensor

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Area of Science:

Aerospace Engineering
Fluid Dynamics
Sensor Technology

Background:

Accurate measurement of air speed, angle of sideslip, and angle of attack is crucial for aircraft control.
Conventional aerodynamic parameter detection devices are often too bulky and heavy for small aircraft.

Purpose of the Study:

To propose a novel and practical methodology for inferring aerodynamic parameters in small aircraft.
To investigate the use of micro hot-film flow sensor arrays for this purpose.

Main Methods:

A micro hot-film flow sensor array was mounted on the wing surface.
A back-propagation neural network was employed to model the relationship between sensor readings and aerodynamic parameters.
Wind tunnel experiments were conducted with two different sensor arrangements to analyze system performance.

Main Results:

The study successfully demonstrated the feasibility of inferring aerodynamic parameters using the proposed sensor system.
Performance was analyzed in relation to different sensor arrangements.

Conclusions:

The micro hot-film sensor array offers a practical and potentially more compact solution for measuring key aerodynamic parameters in small aircraft.
The back-propagation neural network effectively models the complex sensor-aerodynamic parameter relationships.