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<br/> 若果是開環的洗衣機，那么水位的高低得要人來看，人覺得水位合適的時候就會動手關掉水龍頭。簡單地說也就是當反饋是人來判斷的話，那么這個系統就是開環的，如果反饋是機器自己來判斷的，那么這個系統就是閉環的. </p><p>優缺點：</p><p>主要從三方面比較：<br/> <br/> 1、工作原理：開環控制系統不能檢測誤差，也不能校正誤差?？刂凭群鸵种聘蓴_的性能都比較差，而且對系統參數的變動很敏感。合閉環控制系統不管出于什么原因（外部擾動或系統內部變化），只要被控制量偏離規定值，就會產生相應的控制作用去消除偏差?？刂凭群鸵种聘蓴_的性能都比較差，而且對系統參數的變動很敏感。因此，一般僅用于可以不考慮外界影響，或慣性小，或精度要求不高的一些場合。<br/> <br/> 2、結構組成：開環系統沒有檢測設備，組成簡單，但選用的元器件要嚴格保證質量要求。閉環系統具有抑制干擾的能力，對元件特性變化不敏感，并能改善系統的響應特性。<br/> <br/> 3、穩定性：開環控制系統的穩定性比較容易解決。閉環系統中反饋回路的引入增加了系統的復雜性。</p><p><br/></p></div> <div class="blank30"></div> <!-- 分類 --> <div class="blank10"></div> 分類： <a href='/bethel/type/jnc/type-1.html' target='_blank'>加工中心</a> <div class="blank30"></div> <!--自動調用自定義字段--> <div class="blank20"></div> <div class="blank30"></div> <!-- 投票 --> <script src="/index.php?case=vote&act=view&aid=2353"></script> <!-- 自定義表單開始 --> <!-- 自定義表單結束 --> <div class="blank60"></div> <!-- 上下頁開始 --> <div id="page"> <strong>上一篇</strong><a href="/bethel/wd/show_448.html">鉆攻中心合適加工小件批量的金屬產品嗎？</a> <div 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