MPL-B960B-MJ74AA

伺服系統(tǒng)組成原理框圖

1、比較環(huán)節(jié)  比較環(huán)節(jié)是將輸入的指令信號與系統(tǒng)的反饋信號進(jìn)行比較，以獲得輸出與輸入間的偏差信號的環(huán)節(jié)，通常由專門的電路或計算機(jī)來實現(xiàn)。 

 2、控制器  控制器通常是計算機(jī)或PID（比例、積分和微分）控制電路，其主要任務(wù)是對比較元件輸出的偏差信號進(jìn)行變換處理，以控制執(zhí)行元件按要求動作。  

3、執(zhí)行環(huán)節(jié)  執(zhí)行環(huán)節(jié)的作用是按控制信號的要求，將輸入的各種形式的能量轉(zhuǎn)化成機(jī)械能，驅(qū)動被控對象工作。機(jī)電一體化系統(tǒng)中的執(zhí)行元件一般指各種電機(jī)或液壓、氣動伺服機(jī)構(gòu)等。                       

4、被控對象  被控對象指被控制的物件，例如一個機(jī)械手 臂，或是一個機(jī)械工作平臺。   5、檢測環(huán)節(jié)  檢測環(huán)節(jié)是指能夠?qū)敵鲞M(jìn)行測量并轉(zhuǎn)換成比較環(huán)節(jié)所需要的量綱的裝置，一般包括傳感器和轉(zhuǎn)換電路。  

伺服系統(tǒng)的特點和功用

伺服系統(tǒng)與一般機(jī)床的進(jìn)給系統(tǒng)有本質(zhì)上差別，它能根據(jù)指令信號地控制執(zhí)行部件的運動速度與位置。伺服系統(tǒng)是數(shù)控裝置和機(jī)床的聯(lián)系環(huán)節(jié)，是數(shù)控系統(tǒng)的重要組成，具有以下特點：  

具備的傳感器，能準(zhǔn)確地給出輸出量的電信號。  

功率放大器以及控制系統(tǒng)都是可逆的。  

足夠大的調(diào)速范圍及足夠強(qiáng)的低速帶載性能。  

快速的響應(yīng)能力和較強(qiáng)的抗干擾能力。

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