J056031 デジタル動的補償系による熱流束計測システムの構築([J05603]乱流における運動量,熱,物質の輸送現象(3))

概要

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The automatic phase compensator for the thermo-anemometer based on instantaneous temperature signals of flow fields was developed by employing FPGA (Field Programmable Gate Array) device. The cold-wire thermometer composed of the thermo-anemometer involved the frequency response of a first-order lag in a high-frequency range (100Hz-) and a low-frequency range (0.01-10Hz), and their cut-off frequencies vary depending on temperature and velocity fluctuations. The digital compensator with the first-order lead characteristic was designed by utilizing the bilinear transformation. The compensator was reconfigured in synchronization with data sampling through updating the filter coefficients based on the instantaneous temperature fluctuations. It was confirmed that the automatic compensation at the low frequency (0.01 to 1.0 Hz) were realized within the accuracy of 1.0 %.
一般社団法人日本機械学会の論文
2011-09-11