伺服系統(tǒng)一般具備三大環(huán)節(jié)：伺服電機(jī)、伺服驅(qū)動(dòng)器和實(shí)施控制的上位機(jī)，上位機(jī)大都用PLC或單片機(jī)。如圖：

廈門岳航計(jì)算機(jī)工程有限公司

聯(lián)系人：李素云

企業(yè)QQ：2851195446，2851195466

手機(jī)：18965423501

座機(jī)：0592-5165501

伺服電機(jī)是這個(gè)系統(tǒng)的執(zhí)行元件，伺服系統(tǒng)靠脈沖來(lái)定位，而位置控制的基本點(diǎn)是上位機(jī)依據(jù)被控對(duì)象的具體控制要求，編制程序;伺服驅(qū)動(dòng)器執(zhí)行上位機(jī)程序，輸出脈沖。這樣，帶有特定程序規(guī)則的脈沖電源讓伺服電機(jī)驅(qū)使機(jī)械部件實(shí)現(xiàn)位移或轉(zhuǎn)角，完成工序作業(yè)任務(wù)?？梢姛o(wú)論控制對(duì)象的要求千變?nèi)f化，其準(zhǔn)確的位置定位必然與脈沖的數(shù)量和每單位脈沖期間機(jī)械部件的移動(dòng)量這樣兩個(gè)要素密切相關(guān)。

就機(jī)械構(gòu)成而言，伺服電機(jī)輸出軸與負(fù)載輸入之間通常都有減速裝置，它反映了伺服電機(jī)與負(fù)載輸入之間轉(zhuǎn)速的對(duì)應(yīng)(倍率)關(guān)系，俗稱速比。由于機(jī)械結(jié)構(gòu)的特點(diǎn)，這樣的機(jī)械傳動(dòng)系統(tǒng)一旦確立，那么減速裝置的速比就是固定的，如果需要調(diào)整，就意味可能廢除原有硬件，重新制作安裝，顯然不是很方便。能不能找到更方便且有效的途徑，讓機(jī)械系統(tǒng)的速度變化在一定的范圍內(nèi)可調(diào)整、設(shè)定呢?

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