Study of rf direct bandpass sampling structure of software radio amp; amp; its use 射頻直接帶通采樣軟件無線電結(jié)構(gòu)分析及其應(yīng)用
Although reducer can avoid step sense and oscillation partly , the strap transmission will influence orientation precision ( it is key norm to the small metallographic sample cutting machine ) , so plan to use step motor to drive the screw directly , the step motor at low velocity , which is not drived by the subdividing drive system , will have obvious oscillation and noise that would influence the cutting function , the usage life and sample structure 由于步進(jìn)電機(jī)是通過皮帶輪減速來驅(qū)動絲杠,進(jìn)而帶動砂輪片前進(jìn)和后退,雖然減速能部分消除步進(jìn)感和振動,但皮帶傳動會影響定位精度,定位精度對精密切割機(jī)十分關(guān)鍵的技術(shù)指標(biāo)。采用步進(jìn)電機(jī)直接驅(qū)動絲杠,未經(jīng)細(xì)分驅(qū)動的步進(jìn)電機(jī)在低速運行時,有明顯的步進(jìn)感、振動和噪聲,從而對切割的性能、砂輪片的使用壽命、試樣的組織結(jié)構(gòu)產(chǎn)生較大的影響。