一、伺服系統是什么意思

伺服系統（servomechanism）又(you)稱隨動系(xi)統(tong)(tong)，是用(yong)(yong)來精(jing)確地跟(gen)隨或復(fu)現某個過程的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)(kong)制系(xi)統(tong)(tong)。伺(si)服系(xi)統(tong)(tong)使物體的(de)(de)(de)位置(zhi)、方位、狀態等(deng)輸(shu)(shu)出被(bei)控(kong)(kong)(kong)(kong)量能夠跟(gen)隨輸(shu)(shu)入目標（或給定(ding)值）的(de)(de)(de)任意變化的(de)(de)(de)自動控(kong)(kong)(kong)(kong)制系(xi)統(tong)(tong)。它的(de)(de)(de)主要任務是按控(kong)(kong)(kong)(kong)制命令的(de)(de)(de)要求、對功率進行放(fang)大、變換與調控(kong)(kong)(kong)(kong)等(deng)處(chu)理(li)，使驅動裝置(zhi)輸(shu)(shu)出的(de)(de)(de)力矩、速(su)度(du)和位置(zhi)控(kong)(kong)(kong)(kong)制非常靈活(huo)方便。在很(hen)多情況下，伺(si)服系(xi)統(tong)(tong)專指(zhi)被(bei)控(kong)(kong)(kong)(kong)制量（系(xi)統(tong)(tong)的(de)(de)(de)輸(shu)(shu)出量）是機械(xie)位移(yi)或位移(yi)速(su)度(du)、加速(su)度(du)的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)(kong)制系(xi)統(tong)(tong)，其(qi)作用(yong)(yong)是使輸(shu)(shu)出的(de)(de)(de)機械(xie)位移(yi)（或轉(zhuan)(zhuan)角）準確地跟(gen)蹤(zong)輸(shu)(shu)入的(de)(de)(de)位移(yi)（或轉(zhuan)(zhuan)角），其(qi)結(jie)構組成(cheng)和其(qi)他形(xing)式的(de)(de)(de)反(fan)饋控(kong)(kong)(kong)(kong)制系(xi)統(tong)(tong)沒有原則上(shang)的(de)(de)(de)區(qu)別。伺(si)服系(xi)統(tong)(tong)最(zui)初用(yong)(yong)于國(guo)防(fang)軍工，如火炮的(de)(de)(de)控(kong)(kong)(kong)(kong)制，船艦(jian)、飛機的(de)(de)(de)自動駕駛，導彈發射等(deng)，后來逐漸推廣(guang)到(dao)國(guo)民經濟的(de)(de)(de)許(xu)多部門，如自動機床、無線跟(gen)蹤(zong)控(kong)(kong)(kong)(kong)制等(deng)。

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二、伺服系統由哪幾個部分組成

伺服(fu)系統(tong)主要(yao)由三部(bu)分(fen)組成：控制(zhi)(zhi)器，功率(lv)驅(qu)動(dong)(dong)裝置(zhi)和電(dian)(dian)(dian)動(dong)(dong)機(ji)。控制(zhi)(zhi)器按(an)照(zhao)數控系統(tong)的(de)(de)(de)給定值和通過反饋裝置(zhi)檢測的(de)(de)(de)實際(ji)運行值的(de)(de)(de)差，調節(jie)(jie)控制(zhi)(zhi)量；功率(lv)驅(qu)動(dong)(dong)裝置(zhi)作為(wei)系統(tong)的(de)(de)(de)主回路，一方面(mian)按(an)控制(zhi)(zhi)量的(de)(de)(de)大(da)(da)小(xiao)(xiao)將電(dian)(dian)(dian)網中的(de)(de)(de)電(dian)(dian)(dian)能作用到電(dian)(dian)(dian)動(dong)(dong)機(ji)之上(shang)，調節(jie)(jie)電(dian)(dian)(dian)動(dong)(dong)機(ji)轉矩的(de)(de)(de)大(da)(da)小(xiao)(xiao)，另(ling)一方面(mian)按(an)電(dian)(dian)(dian)動(dong)(dong)機(ji)的(de)(de)(de)要(yao)求把恒壓恒頻的(de)(de)(de)電(dian)(dian)(dian)網供(gong)電(dian)(dian)(dian)轉換(huan)為(wei)電(dian)(dian)(dian)動(dong)(dong)機(ji)所需的(de)(de)(de)交流電(dian)(dian)(dian)或(huo)直流電(dian)(dian)(dian)；電(dian)(dian)(dian)動(dong)(dong)機(ji)則按(an)供(gong)電(dian)(dian)(dian)大(da)(da)小(xiao)(xiao)拖動(dong)(dong)機(ji)械運轉。

三、伺服系統的主要作用

1、以(yi)小(xiao)功(gong)率(lv)指令(ling)信號(hao)去控制大功(gong)率(lv)負載。

2、在沒有機械(xie)連接的情況下，由(you)輸(shu)入軸(zhou)控制位(wei)于遠處(chu)的輸(shu)出軸(zhou)，實現遠距同(tong)步傳(chuan)動。

3、使輸出(chu)機械(xie)位移精確(que)地跟(gen)蹤電信號，如記錄(lu)和(he)指示(shi)儀表等。