scholarly journals In-flight wing deformation measurements on a glider

2016 ◽  
Vol 120 (1234) ◽  
pp. 1917-1931 ◽  
Author(s):  
J. Bakunowicz ◽  
R. Meyer
Keyword(s):  
Measurement Techniques ◽  
Flight Test ◽  
Lessons Learned ◽  
Correlation Technique ◽  
Test Bed ◽  
Flight Testing ◽  
Flight Operations ◽  
Flight Measurement ◽  
Industrial Level ◽  
Deformation Measurements

ABSTRACTFlight testing is both vital for collecting data for aeronautic research and at the same time fascinating for its contributors. Taking a glider as a versatile test bed example, this paper presents a transnational measurement campaign within the framework of a collaborative project funded by the European Commission. This project Advanced In-Flight Measurement Techniques 2 (AIM²) is a follow-up of Advanced In-Flight Measurement Techniques (AIM) and dedicated to developing and enhancing promising optical metrology for various flight test applications up to an industrial level.The Image Pattern Correlation Technique (IPCT) and infrared thermography (IRT) are two of these modern non-intrusive measurement methods that were further developed and applied to the glider test bed within the scope of AIM². Focusing on optical deformation measurements with IPCT the experimental setup, the flight testing and results are summarily discussed. Gliders are not commonly used flight test platforms, which is why this contribution concludes with some lessons learned in general and especially related to the presented application. The experience to be shared with the flight testing community addresses equipment preparation, data collection and processing as well as how to meet official requirements and perform test flight operations in a dense controlled airspace.

scholarly journals Development of the Cranfield University Bulldog flight test facility

2017 ◽  
Vol 121 (1238) ◽  
pp. 533-552 ◽  
Author(s):  
N.J. Lawson ◽  
R. Correia ◽  
S.W. James ◽  
J.E. Gautrey ◽  
G. Invers Rubio ◽  
...  
Keyword(s):  
Flight Test ◽  
Development Programme ◽  
Lessons Learned ◽  
Strain Sensors ◽  
Test Facility ◽  
Test Design ◽  
Fibre Optic ◽  
Test Bed ◽  
Optic Sensor ◽  
Computational Fluid Dynamics Cfd

ABSTRACTCranfield University's National Flying Laboratory Centre (NFLC) has developed a Bulldog light aircraft into a flight test facility. The facility is being used to research advanced in-flight instrumentation including fibre optic pressure and strain sensors. During the development of the test bed, Computational Fluid Dynamics (CFD) has been used to assist the flight test design process, including the sensor requirements. This paper describes the development of the Bulldog flight test facility, including an overview of the design and certification process, the in-flight data taken using the installed fibre optic sensor systems and lessons learned from the development programme, including potential further applications of the sensors.

Flight Operations and Lessons Learned of the Rosetta Alice Ultraviolet Spectrograph

2018 ◽  
Author(s):  
Jon P. Pineau ◽  
Joel W. Parker ◽  
Andrew J. Steffl ◽  
Eric Schindhelm ◽  
Richard Medina ◽  
...  
Keyword(s):  
Lessons Learned ◽  
Flight Operations

Multi-Mission Flight Operations at UC Berkeley - Experiences and Lessons Learned

2010 ◽  
Author(s):  
Manfred Bester ◽  
Mark Lewis ◽  
Bryce Roberts ◽  
Jeremy Thorsness ◽  
John McDonald ◽  
...  
Keyword(s):  
Lessons Learned ◽  
Flight Operations

Building the Flight Testing Crew of the HORYZN Student Competition Team - Approach and Lessons Learned

2021 ◽  
Author(s):  
Sebastian J. Koeberle ◽  
Batuhan Yumurtaci ◽  
Christopher Muehlbach ◽  
Paula Zimmermann ◽  
Balázs Nagy ◽  
...  
Keyword(s):  
Lessons Learned ◽  
Team Approach ◽  
Flight Testing

scholarly journals A Test-Bed For Measuring UAS Servo Reliability

Aerospace ◽  
2019 ◽  
Vol 6 (9) ◽  
pp. 96
Author(s):  
AbdElRahman ElSaid ◽  
Daniel Adjekum ◽  
John Nordlie ◽  
Fatima El Jamiy
Keyword(s):  
Performance Standards ◽  
Baseline Period ◽  
Base Line ◽  
Test Bed ◽  
Real World Data ◽  
Safety Hazard ◽  
Flight Operations ◽  
Component Test ◽  
The Mean ◽  
Commercial Off The Shelf

Extant literature suggests minimal research on the reliability of Commercial off-the-shelf (COTS) components used in fabricating non-military Unmanned Aerial System (UAS). Stochastic failures of components during operational cycles over time poses a safety hazard to flight operations. The purpose of the study was to critically assess the operational performance standards (reliability) of a laboratory designed UAS component test-bed operated using real-world data collected from a Boeing Scan Eagle® UAS aileron servo unit via a flight data recorder. The study hypothesized that the test-bed’s reliability, in terms of a measured encoder output of commanded servo positions, will not be significantly different after double and triple periods of time for continuous operations compared to a base-line mean position. Results suggested that test-bed operated within reliability criteria for a baseline period but there were significant differences in the mean of the reliability after the operational cycles were doubled and tripled in time. This study adds to paucity of extant research on UAS COTS reliability and recommends further studies on reliability of other small UAS components within periods of time.

Editorial for the special feature on Advanced In-flight Measurement Techniques AIM2

2017 ◽  
Vol 28 (4) ◽  
pp. 040101 ◽  
Author(s):  
F Boden ◽  
N J Lawson ◽  
S W James ◽  
R P Tatam
Keyword(s):  
Measurement Techniques ◽  
Flight Measurement

Measurement of soil particle-size distribution by the PARIO measurement system: lessons learned and comparison with two other measurement techniques

2020 ◽  
Author(s):  
Attila Nemes ◽  
Anna Angyal ◽  
Andras Mako ◽  
Jan Erik Jacobsen ◽  
Eszter Herczeg
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Measurement Techniques ◽  
Temperature Shift ◽  
Quantitative Information ◽  
Lessons Learned ◽  
Soil Particle ◽  
Soil Particle Size ◽  
Soil Particle Size Distribution

<p>The PARIO system is a novel technique for the measurement of soil particle-size distribution. It is a computerized sedimentation-based system that will yield a quasi-continuous particle-size distribution curve. Given that it is semi-automated, continuous and sedimentation-based, this system promises to become a good and compatible alternative to the traditional pipette or hydrometer techniques. Through hundreds of measurements we have acquired practical operational knowledge that this poster will share with potential future users. We will also present quantitative information on the technique’s sensitivity to e.g. temperature shift or intermittent vibration during measurement. We also used a set of 45 soil samples of various texture from Norway to compare particle-size distribution measured by the PARIO system, the traditional pipette technique and laser diffractometry. We discuss measurement results as well as related sample-preparation aspects.</p>

The Flight Testing of Natural and Hybrid Laminar Flow Nacelles

1994 ◽  
Author(s):  
Brian Barry ◽  
Simon J. Parke ◽  
Nicholas W. Bown ◽  
Hansgeorg Riedel ◽  
Martin Sitzmann
Keyword(s):  
Boundary Layer ◽  
Laminar Flow ◽  
Aircraft Engine ◽  
Flight Test ◽  
Boundary Layer Transition ◽  
Future Application ◽  
Flight Testing ◽  
Layer Transition ◽  
Suction System ◽  
Natural Laminar Flow

The achievement of large areas of laminar flow over aircraft engine nacelles offers significant savings in aircraft fuel consumption. Based upon current engine configurations nett sfc benefits of up to 2% are possible. In addition the engine nacelle is ideally suited to the early inclusion of laminar flow technology, being relatively self contained with the possibility of application to existing airframes. In September 1992 a European Consortium managed by Rolls-Royce including MTU and DLR began flight testing of a natural laminar flow nacelle. This programme was later extended by R-R and DLR to flight test a hybrid laminar flow nacelle featuring boundary layer suction and insect contamination protection. The tests evaluated the effects of flight and engine environment, boundary layer transition phenomena, suction system operation and insect contamination avoidance strategies. This paper describes the global conclusions from these flight tests which are a significant milestone leading to the future application of laminar flow technology to engine nacelles.

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