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title="數(shù)控文章" href="/bethel/news">數(shù)控文章</a></li> </ol> </nav> </div> <!--/sub_menu--><!-- 面包屑導(dǎo)航結(jié)束 --> <!-- 頁面標(biāo)題開始 --> <div id="n1l1njb9b" class="title"> <h3><a>數(shù)控加工中心龍門磁懸浮系統(tǒng)耦合分析及控制研究-結(jié)論與展望<small></small></a></h3> </div> <!-- 頁面標(biāo)題結(jié)束 --> <hr class="featurette-divider"> <!-- 中部開始 --> <div id="n1l1njb9b" class="container"> <!-- 正文 --> <div id="n1l1njb9b" class="lead" id="print"> <p> <a name="bookmark54" style="line-height: 22pt; background-color: transparent;"><span id="n1l1njb9b" class="1">第六章結(jié)論與展望</span></a></p> <div id="n1l1njb9b" class="Section1"> <p class="640" style="text-indent:27.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"><span id="n1l1njb9b" class="64">數(shù)控加工中心龍門移動式數(shù)控機床已成為當(dāng)今工業(yè)生產(chǎn)重要的設(shè)備之一，制約其 加工精度的主要因素為移動橫梁與導(dǎo)軌之間的摩擦。因此將磁懸浮技術(shù)應(yīng)用到數(shù)控龍 門加工中心上可以完全消除摩擦的影響從而提高加工精度，而且對環(huán)境不會造成污 染。由于移動橫梁是由兩個電磁懸浮系統(tǒng)共同懸浮，因此兩個電磁懸浮系統(tǒng)被機械橫 梁耦合在了一起。本文對雙電磁懸浮系統(tǒng)的耦合情況進行了分析，并且對單電磁懸浮 系統(tǒng)的控制算法也做了一些研究，得到以下結(jié)論：</span></p> <p class="640" style="margin-left:0cm;text-indent:27.0pt;line-height:23.3pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:45.9pt; background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(1)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="n1l1njb9b" class="64">由于兩個電磁懸浮系統(tǒng)存在耦合，因此本文首先對雙電磁懸浮系統(tǒng)的耦合情 況進行了分析。通過一系列公式的理論推導(dǎo)得出了機械橫梁豎直方向移動和繞質(zhì)心旋 轉(zhuǎn)時雙電磁懸浮系統(tǒng)耦合的定量關(guān)系。耦合的存在并不是完全有害的，機械耦合的強 迫協(xié)調(diào)性可以用來提高兩個電磁懸浮系統(tǒng)的同步性能。在利用耦合的基礎(chǔ)上設(shè)計了速 度、氣隙雙重交叉耦合同步控制器提高兩個電磁懸浮系統(tǒng)的同步性能。仿真結(jié)果表明 當(dāng)一個懸浮系統(tǒng)受到</span><span id="n1l1njb9b" class="64"><span style="font-family: SimSun;">500</span></span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">N</span></span><span id="n1l1njb9b" class="64">脈沖干擾時采用交叉耦合控制器系統(tǒng)的同步偏差明顯小于 沒有采用該控制策略的系統(tǒng)。當(dāng)系統(tǒng)受到</span><span id="n1l1njb9b" class="64"><span style="font-family: SimSun;">500</span></span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">N</span></span><span id="n1l1njb9b" class="64">的階躍和周期干擾時兩個懸浮系統(tǒng)同 樣具有良好的同步性能。</span></p> <p class="640" style="margin-left:0cm;text-indent:27.0pt;line-height:23.3pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:46.1pt; background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(2)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="n1l1njb9b" class="64">由于系統(tǒng)耦合的存在，從解耦的角度出發(fā)，對雙懸浮系統(tǒng)進行了解耦控制器 設(shè)計。本文采用了逆系統(tǒng)解耦的方法。由于電磁懸浮系統(tǒng)是典型的非線性系統(tǒng)，因此 很難推算出電磁懸浮系統(tǒng)的</span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">a</span></span><span id="n1l1njb9b" class="64">階逆系統(tǒng)。為了解決這一問題利用支持向量機的非線性 回歸功能擬合出了雙電磁懸浮系統(tǒng)的</span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">a</span></span><span id="n1l1njb9b" class="64">階逆系統(tǒng)。將逆系統(tǒng)串聯(lián)在雙懸浮系統(tǒng)前將其 解耦。仿真結(jié)果表明當(dāng)一個懸浮系統(tǒng)受到干擾懸浮氣隙發(fā)生變化時，另外一個懸浮系 統(tǒng)的懸浮氣隙不在發(fā)生變化，因此實現(xiàn)了雙電磁懸浮系統(tǒng)的解耦目的。</span></p> <p class="640" style="margin-left:0cm;text-indent:27.0pt;line-height:23.3pt; mso-line-height-rule:exactly;mso-list:l0 level1 lfo1;tab-stops:45.9pt; background:transparent"><!--[if !supportLists]--><span style="font-family: SimSun;">(3)<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span id="n1l1njb9b" class="64">為了提高解耦后單電磁懸浮系統(tǒng)的性能，根據(jù)無源控制理論本文設(shè)計了無源 控制器。首先建立懸浮系統(tǒng)的磁鏈模型，然后建立哈密爾頓函數(shù)，通過互聯(lián)陣和能耗 陣的配置將懸浮系統(tǒng)轉(zhuǎn)化為無源系統(tǒng)，從而建立了新的哈密爾頓函數(shù)。通過3個約束 條件求解哈密爾頓偏微分方程推出無源控制器的表達式。仿真結(jié)果表明無源控制相比</span><span id="n1l1njb9b" class="64">于</span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">PID</span></span><span id="n1l1njb9b" class="64">控制和模糊控制</span><span id="n1l1njb9b" class="64TimesNewRoman1"><span lang="EN-US" style="font-size: 11pt;">PID</span></span><span id="n1l1njb9b" class="64">無源控制使得電磁懸浮系統(tǒng)的具有了較好的快速性和魯 棒性。</span></p> <p class="640" style="text-indent:27.0pt;line-height:23.3pt;mso-line-height-rule: exactly;background:transparent"><span id="n1l1njb9b" class="64">由于時間的原因龍門數(shù)控加工中心雙電磁懸浮系統(tǒng)的耦合分析還有許多問題有 待解決。本文只對移動橫梁垂直方向的耦合情況進行了分析，而沒有同時對水平方向 由于直線電機導(dǎo)向單元不同步造成的耦合情況進行分析。今后可以在建立雙電磁懸浮 系統(tǒng)全新耦合模型、解耦算法設(shè)計以及解耦后獨立系統(tǒng)設(shè)計更先進的控制器來改善懸 浮系統(tǒng)的魯棒性等方面進行更深入的研究。</span></p> </div> <p><span style="font-size:11.5pt;font-family:宋體;mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-ansi-language:#0400;mso-fareast-language: #0400;mso-bidi-language:AR-SA"><br clear="all" style="page-break-before:always; mso-break-type:section-break" /> </span></p> <p> </p> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">本文采摘自“數(shù)控加工中心龍門磁懸浮系統(tǒng)耦合分析及控制研究”，因為編輯困難導(dǎo)致有些函數(shù)、表格、圖片、內(nèi)容無法顯示，有需要者可以在網(wǎng)絡(luò)中查找相關(guān)文章！本文由伯特利數(shù)控整理發(fā)表文章均來自網(wǎng)絡(luò)僅供學(xué)習(xí)參考，轉(zhuǎn)載請注明！</span><span lang="EN-US" style="font-size:9.0pt"> <o:p></o:p></span></p></div> <div id="n1l1njb9b" class="blank30"></div> <!-- tag --> <div id="n1l1njb9b" class="blank10"></div> 標(biāo)簽： <a href='/index.php?case=tag&act=show&tag=%E9%BE%99%E9%97%A8%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>龍門加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' 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