By Fritz Boden, Nicholas Lawson, Henk W. Jentink, Jürgen Kompenhans
The ebook offers a synopsis of the most effects completed throughout the three 12 months EU-project "Advanced Inflight dimension suggestions (AIM)" which utilized complex picture dependent size options to commercial flight trying out. The ebook is meant to be not just an summary at the target actions but in addition a advisor at the program of complicated optical size ideas for destiny flight checking out. additionally it's a helpful consultant for engineers within the box of experimental equipment and flight trying out who face the problem of a destiny requirement for the improvement of hugely actual non-intrusive in-flight size ideas.
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Additional resources for Advanced In-Flight Measurement Techniques
A flight test recording was analyzed in order to check the method’s capability to determine the aileron rotation by cross-correlating the stripe partitions under in-flight conditions. 17 shows a comparison of the optically derived aileron rotation versus synchro-meter data. 15◦ . 1◦ 30 H. P. J. Veerman et al. vertical displacements of stripe on aileron (measurement No. 1652) 9 vertical displacements [pixels] 8 7 6 5 4 3 2 1 0 -1 1,000 1,050 1,100 1,150 1,200 1,250 1,300 x axis along stripe [pixels] Fig.
8 the power spectrum of the acceleration signals from 0 till 25 Hz is shown. The IPCT acceleration contains only frequency information up to 12 Hz. Due to the sample rate of 1024 Hz, the accelerometer provides information up to 512 Hz. The comparison of the acceleration data shows, both, the IPCT and the accelerometer data, fit together quite well over the excited bandwidth from 3 to 10 Hz. Furthermore, it can be observed that the magnitude of the signal obtained with IPCT below 3 Hz is lower than the accelerometer signal.
Heave results obtained by IPCT over the processed wing area were extrapolated to the micrometer measurement location at the wing. 55 mm 22 H. P. J. Veerman et al. vertical deflection was measured at the reference point. 1 mm error bound in agreement with micrometer based measurements. 2 Simultaneous Measurements by Both Cameras During Taxi During taxiing chaotic, highly dynamic vibrations of the wing were observed, caused by repeated receipt of stimuli from the taxiway surface. It was considered very interesting to collect a simultaneous image sequence of these motions using both installed cameras and compare the obtained local displacement results.
Advanced In-Flight Measurement Techniques by Fritz Boden, Nicholas Lawson, Henk W. Jentink, Jürgen Kompenhans