Research on high precision atmospheric data acquisition system of five hole probe

DOI:	10.11809/bqzbgcxb2023.10.037
Keywords:	five hole probe; angle of attack; atmospheric data acquisition; microelectronic sensor; high precision
Abstract:	According to the requirements of a certain type of unmanned aerial vehicle for the atmospheric data acquisition system, the high precision atmospheric data acquisition system of five hole probe based on FPGA+DSP is researched and designed; based on FPGA, the high speed synchronous acquisition of multi channel sensors is realized, and the data is calculated by DSP. Finally, the data is sent to the host computer for real time display and image monitoring; MEMS digital sensors, communication isolation chips and power supply filter circuits are used in hardware to increase signals anti interference ability. The dynamic pressure data is respectively subjected to second order temperature compensation and filtering, and the linear interpolation algorithm is used for error compensation to improve the accuracy. After multiple sets of tests and verifications, the average error of air pressure altitude is 0.058 5 m, and the average error of angle of attack and sideslip angle is 0.139°. Compared with the traditional angle of attack sensor, the accuracy is improved by nearly 40%, which meets the requirements of flight control system for five hole detection.
Issue:	Vol. 44 No. 10 (2023)
Published:	2023-10-28
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