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Title: In-flight measurement of angle of attack
Author: Sims, J. P.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1995
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Three possible techniques for measuring angle of attack (AOA) have been investigated with a view to establishing a low-cost method for use in light aircraft. Basically, methods using new silicon bonded pressure transducers and low cost inertial components have been compared with a standard AOA system. An Inertial Measurement Unit (IMU) and a differential pressure AOA system have been designed and constructed using the low-cost transducers and both have been installed in a twin engined general aviation aircraft along with the Teledyne AOA cone probe. A series of flight tests have been conducted to analyze and compare the three AOA sensors and the results have shown that the low-cost differential pressure sensor system provided data as good as the more expensive commercial unit for approximately one-tenth of its cost. The IMU system required high accuracy in the acceleration channels and though this precluded the use of low-cost accelerometers, the low-cost rate and attitude sensors coupled with the high accuracy accelerometers did provide adequate AOA data. The final results demonstrated that the differential pressure AOA was accurate to within ±0.50° and the low-cost IMU (with high accuracy acceleration calculated AOA) was accurate to within ±1.50°.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available