描述
設(shè)總孔數(shù)為D2,總脈沖數(shù)D0,分度脈沖可計(jì)算為:D0/D2=D4+D5(余數(shù))。若D5=0時,步進(jìn)電機(jī)每轉(zhuǎn)動一次,電機(jī)轉(zhuǎn)角控制脈沖均為D4。若D5≠0時,將D5與孔數(shù)的一半(D2/2=D8)進(jìn)行比較,若小于孔數(shù)的一半,步進(jìn)電機(jī)先按D4個脈沖分度,步進(jìn)電機(jī)每轉(zhuǎn)過一個分度角,余數(shù)D5累積一次,當(dāng)累積數(shù)大于D8時,步進(jìn)電機(jī)則按D4+1個脈沖分度一次,此時累積數(shù)減去D4+1脈沖的余數(shù)即D2-D5,然后再按D4個脈沖分度,依次類推直至分度完畢;若余數(shù)大于孔數(shù)的一半,步進(jìn)電機(jī)先按D4+1個脈沖分度,余數(shù)按D2-D5累積,當(dāng)累積數(shù)大于D8時,步進(jìn)電機(jī)則按D4個脈沖分度一次,此時累積數(shù)減去D4脈沖的余數(shù)D5,然后再按D4+1個脈沖分度,依次類推直至分度完畢。這樣的分度算法,使孔與孔之間的分度誤差始終小于一個脈沖當(dāng)量,可以實(shí)現(xiàn)在3600轉(zhuǎn)角誤差為0的分度精度要求。
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結(jié)構(gòu)的zui現(xiàn)代化的容錯控制器。
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