一、伺服系統是什么意思

伺服系統（servomechanism）又稱隨(sui)動系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)，是(shi)用(yong)來精(jing)確地跟(gen)(gen)隨(sui)或復現某(mou)個過(guo)程的(de)(de)(de)(de)(de)反(fan)饋控制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。伺服(fu)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)使物體(ti)的(de)(de)(de)(de)(de)位(wei)(wei)置(zhi)、方(fang)位(wei)(wei)、狀態等輸(shu)(shu)出被(bei)控量(liang)能(neng)夠跟(gen)(gen)隨(sui)輸(shu)(shu)入(ru)目標（或給定值）的(de)(de)(de)(de)(de)任意變化的(de)(de)(de)(de)(de)自(zi)(zi)動控制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。它的(de)(de)(de)(de)(de)主要任務是(shi)按控制(zhi)命(ming)令的(de)(de)(de)(de)(de)要求(qiu)、對功(gong)率進行放大、變換(huan)與調控等處(chu)理，使驅動裝(zhuang)置(zhi)輸(shu)(shu)出的(de)(de)(de)(de)(de)力矩、速度(du)和位(wei)(wei)置(zhi)控制(zhi)非常靈活方(fang)便。在很多情(qing)況下，伺服(fu)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)專指被(bei)控制(zhi)量(liang)（系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)(de)(de)(de)輸(shu)(shu)出量(liang)）是(shi)機械位(wei)(wei)移(yi)或位(wei)(wei)移(yi)速度(du)、加速度(du)的(de)(de)(de)(de)(de)反(fan)饋控制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)，其作用(yong)是(shi)使輸(shu)(shu)出的(de)(de)(de)(de)(de)機械位(wei)(wei)移(yi)（或轉(zhuan)角(jiao)）準確地跟(gen)(gen)蹤輸(shu)(shu)入(ru)的(de)(de)(de)(de)(de)位(wei)(wei)移(yi)（或轉(zhuan)角(jiao)），其結構(gou)組(zu)成和其他形式的(de)(de)(de)(de)(de)反(fan)饋控制(zhi)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)沒(mei)有原(yuan)則上(shang)的(de)(de)(de)(de)(de)區別。伺服(fu)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)最初用(yong)于國防(fang)軍工，如(ru)火炮的(de)(de)(de)(de)(de)控制(zhi)，船艦、飛機的(de)(de)(de)(de)(de)自(zi)(zi)動駕駛(shi)，導彈發射等，后來逐漸推廣到國民經(jing)濟的(de)(de)(de)(de)(de)許多部門，如(ru)自(zi)(zi)動機床、無線(xian)跟(gen)(gen)蹤控制(zhi)等。

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二、伺服系統由哪幾個部分組成

伺服系統(tong)(tong)主要由三部分(fen)組(zu)成：控(kong)(kong)制(zhi)器，功率驅動(dong)裝置和(he)電(dian)(dian)(dian)動(dong)機(ji)(ji)。控(kong)(kong)制(zhi)器按(an)照(zhao)數控(kong)(kong)系統(tong)(tong)的(de)給定值和(he)通(tong)過反(fan)饋裝置檢測的(de)實際運行值的(de)差，調節控(kong)(kong)制(zhi)量；功率驅動(dong)裝置作為(wei)系統(tong)(tong)的(de)主回路，一(yi)方面按(an)控(kong)(kong)制(zhi)量的(de)大小(xiao)將電(dian)(dian)(dian)網中的(de)電(dian)(dian)(dian)能作用到(dao)電(dian)(dian)(dian)動(dong)機(ji)(ji)之上，調節電(dian)(dian)(dian)動(dong)機(ji)(ji)轉(zhuan)矩(ju)的(de)大小(xiao)，另(ling)一(yi)方面按(an)電(dian)(dian)(dian)動(dong)機(ji)(ji)的(de)要求(qiu)把恒壓恒頻的(de)電(dian)(dian)(dian)網供(gong)電(dian)(dian)(dian)轉(zhuan)換(huan)為(wei)電(dian)(dian)(dian)動(dong)機(ji)(ji)所需的(de)交流(liu)電(dian)(dian)(dian)或直流(liu)電(dian)(dian)(dian)；電(dian)(dian)(dian)動(dong)機(ji)(ji)則按(an)供(gong)電(dian)(dian)(dian)大小(xiao)拖動(dong)機(ji)(ji)械(xie)運轉(zhuan)。

三、伺服系統的主要作用

1、以小功(gong)(gong)率指(zhi)令信號去(qu)控制大功(gong)(gong)率負載。

2、在沒(mei)有機(ji)械(xie)連接的情(qing)況下(xia)，由(you)輸(shu)(shu)入軸(zhou)控制(zhi)位于遠(yuan)處的輸(shu)(shu)出軸(zhou)，實現遠(yuan)距同步(bu)傳動。

3、使(shi)輸出機械位(wei)移精確地(di)跟(gen)蹤電信號，如(ru)記錄和指(zhi)示儀(yi)表等(deng)。