一、伺服系統是什么意思

伺服系統（servomechanism）又(you)稱(cheng)隨(sui)(sui)動(dong)(dong)系(xi)(xi)統(tong)(tong)(tong)，是用來精確地跟(gen)隨(sui)(sui)或復現某(mou)個(ge)過(guo)程的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)(tong)。伺服系(xi)(xi)統(tong)(tong)(tong)使(shi)物體的(de)(de)(de)位置(zhi)(zhi)、方(fang)位、狀態(tai)等輸(shu)出(chu)(chu)被(bei)控(kong)(kong)(kong)量能(neng)夠跟(gen)隨(sui)(sui)輸(shu)入目標（或給(gei)定值）的(de)(de)(de)任意變化的(de)(de)(de)自(zi)動(dong)(dong)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)(tong)。它(ta)的(de)(de)(de)主要(yao)任務是按控(kong)(kong)(kong)制(zhi)(zhi)(zhi)命(ming)令的(de)(de)(de)要(yao)求(qiu)、對功率進行放大、變換(huan)與調控(kong)(kong)(kong)等處理，使(shi)驅動(dong)(dong)裝置(zhi)(zhi)輸(shu)出(chu)(chu)的(de)(de)(de)力(li)矩、速度和位置(zhi)(zhi)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)非常(chang)靈活(huo)方(fang)便。在很多情況下，伺服系(xi)(xi)統(tong)(tong)(tong)專指被(bei)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)量（系(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)輸(shu)出(chu)(chu)量）是機(ji)(ji)械(xie)位移或位移速度、加(jia)速度的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)(tong)，其(qi)作用是使(shi)輸(shu)出(chu)(chu)的(de)(de)(de)機(ji)(ji)械(xie)位移（或轉角）準(zhun)確地跟(gen)蹤輸(shu)入的(de)(de)(de)位移（或轉角），其(qi)結構(gou)組成(cheng)和其(qi)他形式的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)制(zhi)(zhi)(zhi)系(xi)(xi)統(tong)(tong)(tong)沒有原則上的(de)(de)(de)區別。伺服系(xi)(xi)統(tong)(tong)(tong)最初用于國防軍工，如火炮的(de)(de)(de)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)，船艦、飛(fei)機(ji)(ji)的(de)(de)(de)自(zi)動(dong)(dong)駕(jia)駛，導彈發射等，后來逐漸推廣到國民經(jing)濟的(de)(de)(de)許多部(bu)門，如自(zi)動(dong)(dong)機(ji)(ji)床、無線跟(gen)蹤控(kong)(kong)(kong)制(zhi)(zhi)(zhi)等。

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二、伺服系統由哪幾個部分組成

伺服系統主(zhu)要(yao)由三部分(fen)組成：控制(zhi)器，功率驅動(dong)裝(zhuang)(zhuang)置(zhi)(zhi)和(he)電(dian)動(dong)機(ji)(ji)(ji)。控制(zhi)器按(an)照數控系統的(de)給定值(zhi)和(he)通過反饋裝(zhuang)(zhuang)置(zhi)(zhi)檢測的(de)實際運(yun)行值(zhi)的(de)差，調節控制(zhi)量；功率驅動(dong)裝(zhuang)(zhuang)置(zhi)(zhi)作為系統的(de)主(zhu)回路，一方面按(an)控制(zhi)量的(de)大(da)小(xiao)將電(dian)網中的(de)電(dian)能作用到(dao)電(dian)動(dong)機(ji)(ji)(ji)之上，調節電(dian)動(dong)機(ji)(ji)(ji)轉矩(ju)的(de)大(da)小(xiao)，另一方面按(an)電(dian)動(dong)機(ji)(ji)(ji)的(de)要(yao)求把恒(heng)壓恒(heng)頻(pin)的(de)電(dian)網供電(dian)轉換為電(dian)動(dong)機(ji)(ji)(ji)所需(xu)的(de)交流(liu)電(dian)或直流(liu)電(dian)；電(dian)動(dong)機(ji)(ji)(ji)則按(an)供電(dian)大(da)小(xiao)拖動(dong)機(ji)(ji)(ji)械運(yun)轉。

三、伺服系統的主要作用

1、以(yi)小功率指令信號去控制(zhi)大功率負(fu)載。

2、在(zai)沒有機械連接的情況(kuang)下，由輸(shu)入軸控制位于遠處(chu)的輸(shu)出軸，實現遠距同步傳動。

3、使輸出機械位移精(jing)確(que)地跟(gen)蹤電信號(hao)，如記錄(lu)和(he)指示儀表(biao)等。