Research on Dynamic Acquisition and Noise Reduction Technology of Aircraft Parameters
Aiming at the large amount of noise interference in dynamic data acquisition during aircraft testing,a noise optimi-zation solution combining hardware and software is designed.By analyzing the principle of π type filter circuit,designing relevant parameters,and building π type CRC passive filter circuit,the problem of signal distortion caused by ripple interference is solved from the hardware level.Through theoretical simulation in FPGA and design of recursive average filter,the problem of signal reli-ability reduction caused by spike noise interference is solved from the software level.The experimental results show that the noise op-timization scheme can significantly reduce the noise peak value.The optimized sampler has completed many high and low tempera-ture and vibration tests,and its performance is stable and reliable.At present,it has been applied in the large-scale ground test of an aircraft.
data acquisitionπ type filterFPGArecursive average filtering algorithm
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