tailieunhanh - Recent Advances in Signal Processing 2011 Part 15

Tham khảo tài liệu 'recent advances in signal processing 2011 part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Real-Time Signal Acquisition High Speed Processing and Frequency Analysis in Modern Air Data Measurement Instruments 477 a a1y a1z V 1 a x a2 a2z V V. axis a3x a3y a V V . axis a a4x a4 a _ L z _l V s 4 _ 11 where aik are the x y z coordinates of the unit vectors at the four laser axis i 1 2 3 4 and k x y z . A solution can also be found even if only three channels are available. 4. Flight results A number of flight tests have been planned and performed in order to test the operation of the developed unit as well as to prove its effectiveness for on board real-time air-data measurements. During the flights the calculated parameters as well as all the other useful system s data are being recorded constantly updated and properly displayed in a functional Man Machine Interface MMI . The Doppler frequency histogram as well as the power spectrum SNR histogram corresponding to the two local channels are also presented. Fig. 15 shows the MMI at such a state during one of the flights. Axis Velocity m s Sigma m s Num of Detections SNR dB Axis 1 4Ũ3Ũ Axis 2 4Ũ87 Axis 3 3625 Axis 4 3415 Date TIme 09-02-19 Laser parameters Axis Lambda pm Power dBm Axis 1 Axis 2 Axis 3 Axis 4 computed velocities on axes v_x m s V y m s v_z m s Computed Airspeed parameters Parameter Value Sigma TAS kt AOA SSA Mode information and RDR Leds RTP Mode N Laserstatus N 888 min to HDD full 71119 MB free Laserinterlock 0 Signal Levels M M M M Minutes to calibration 16 Axis 4 Axis 3 Frequency Histogram Distribution of Detections Frequency Histogram Distribution of Detections 60 73 Iso 90 1100 1110 1120 1130 50 73 Iso 90 1100 1110 1120 1130 SNR Histogram Distribution of Detections JI. SNR Histogram Distribution of Detections 3 12 25 37 50 62 75 -J5Z 3 12 25 37 50 62 75 -ỀI Fig. 15. The MMI of the NESLIE .

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