Novel algorithm of tracking band-pass digital filter with amplitude 1 / f 2 attenuation for vortex signal extraction
作者: Jie ChenChenyang FanBin LiJian YinXiaojia Liu
作者单位: 1School of Mechatronics Engineering and Automation, Shanghai University, 140 Guangyan Road, Shanghai 200072, PR China
刊名: Flow Measurement and Instrumentation, 2015, Vol.45 , pp.82-92
来源数据库: Elsevier Journal
DOI: 10.1016/j.flowmeasinst.2015.04.012
关键词: Butterworth band-pass filterDigital filterSignal processingVortex signal
原始语种摘要: Abstract(#br)A digital band-pass filter group for vortex signal extraction is proposed in this paper. The digital filter could attenuate vortex amplitude with 40dB/dec, and the algorism could track the real vortex signal frequency. Offline simulation is carried out compared with autocorrelation algorithm, which shows that the novel algorithm has the ability to filter noise out better. Then the performance of online measurement is accessed. And the test results show that this novel algorithm improves the measurement accuracy and broadens the range limit especially in low flow velocity as Reynolds number ranges from 5 × 10 3 to 3.5 × 10 5 .
全文获取路径: Elsevier  (合作)
影响因子:0.971 (2012)