Abstract
Configuration design, analysis, and wind tunnel test of a vane-type multi-function air data probe (MFP) was described. First, numerical analysis was conducted for the initial configuration of the MFP in order to investigate aerodynamic characteristics. Then, the design was modified to improve static and dynamic stability for better response characteristics. The modified configuration design was verified through wind tunnel tests. The test results are also used to verify the accuracy of the analytical method. The analytically estimated aerodynamic damping provided by the Navier-Stokes equation solver correlated well with the wind tunnel test results. According to the calculation, the damping coefficient estimated from ramp motion analysis yielded a better correlation with the wind tunnel test than pitch oscillation analysis.
Highlights
The traditional air data system of an aircraft measures the airspeed and the altitude by using Pitot-static probe and measures the angle of attack by using the vane type angle of attack sensor independently
As the configuration update presented in this study improves the aerodynamic damping, the mechanical damper is expected to be reduced in size, yielding less system weight and cost
The direction of the design modification is determined by estimating how much improvement in aerodynamic damping can be achieved by adding a surface to the initial multi-function air data probe (MFP)
Summary
The traditional air data system of an aircraft measures the airspeed and the altitude by using Pitot-static probe and measures the angle of attack by using the vane type angle of attack sensor independently. The MFP can measure airspeed, altitude and angle of attack simultaneously and can transmit the digital signal of data to the flight control computer directly A vane-type MFP has total and static pressure holes combined with a rotating vane for the measurement of angle (a) Traditional air data system (b) MFP(SmartProbeTM) air data system As the configuration update presented in this study improves the aerodynamic damping, the mechanical damper is expected to be reduced in size, yielding less system weight and cost
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