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transparent;"><span style="font-size: small;"><span class="13pt">第一章绪论</span></span></a></p> <div class="Section1"> <p class="22" style="margin-top:0cm;margin-right:0cm;margin-bottom:7.6pt; margin-left:0cm;line-height:13.0pt;mso-line-height-rule:exactly;mso-pagination: lines-together;page-break-after:avoid;background:transparent"><a name="bookmark1"></a><span style="font-size: small;"><a name="bookmark1"><span class="20"><span style="font-family: SimSun;">1.1</span></span></a><span class="20">研究课题的背景及意义</span></span></p> <p class="21" style="margin-top:0cm;text-align:justify;text-justify:inter-ideograph; text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule:exactly;background: transparent"><span style="font-size: small;"><span class="2">本课题来自于国家自然科学基金项目“龙门移动式数控加工中心的横梁同步磁悬 浮系统研究”</span><span class="2"><span lang="EN-US">（</span></span><span class="2">项目批准号：</span><span class="2"><span style="font-family: SimSun;">50805098)</span></span><span class="2">。</span></span></p> <p class="21" style="margin-top:0cm;text-align:justify;text-justify:inter-ideograph; text-indent:26.0pt;line-height:23.3pt;mso-line-height-rule:exactly;background: transparent"><span style="font-size: small;"><span class="2">伴随着现代科技的空前发展和控制理论不断地完善，工业实践生产技术发展得到 了突飞猛进的发展。高精度精密仪器和高精度部件对加工工艺要求日益增加，传统的 龙门数控机床已经远远达不到现代部件高精度的要求。而且传统的数控机床加工部件 时存在严重的摩擦，这种摩擦百害而无一利大大降低了加工部件的精度和横梁推进的 速度。随着电磁悬浮技术的不断成熟，将磁悬浮技术应用到数控机床加工中心上已成 为当今的热点。当电磁力与横梁重力平衡时移动横梁会被悬浮起来，横梁与导轨分离 从而消除了摩擦。电磁悬浮技术的应用可以使加工中心的精度达到传统机械支撑技术 无法触及的高度，其具有如下的特点<sup>[1</sup>_<sup>2]</sup>:</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:32.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:0cm;line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:57.3pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(1)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">没有任何摩擦，功率消耗低；</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:32.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:0cm;line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:57.3pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(2)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">维修维护成本低，延长了加工中心的使用寿命；</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:32.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:0cm;line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:57.3pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(3)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">加工时横梁移动时温度低，噪声小；</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:32.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:0cm;line-height:23.3pt;mso-line-height-rule:exactly;mso-list:l0 level1 lfo1; tab-stops:57.3pt;background:transparent"><span style="font-size: small;"><!--[if !supportLists]--><span style="font-family: SimSun;">(4)<span style="font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">不需要任何润滑剂减小摩擦，从而降低对环境的污染；</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:32.0pt;margin-bottom:.0001pt;text-align:justify;text-justify:inter-ideograph; text-indent:0cm;line-height:23.3pt;mso-line-height-rule:exactly;background: transparent"><span style="font-size: small;"><span class="2"><span style="font-family: SimSun;">(</span></span><span class="2">5 </span><span class="2"><span style="font-family: SimSun;">)</span></span><span class="2">电磁悬浮系统的刚度调剂比较灵活且拥有调整自身阻尼的本领。</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:20.25pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 26.0pt;line-height:23.3pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size: small;"><span class="2">数控龙门加工中心的移动横梁采用的是由两个电磁悬浮系统共同悬浮的，且电磁 悬浮系统是非线性系统的范例。系统启动悬浮过程以及进入稳态后受到外界不确定性 扰动时会产生复杂的电磁悬浮系统耦合现象，分析耦合特性能、有效地解除耦合以及 如何控制解耦后单电磁悬浮系统以达到高精度悬浮的要求是我课题研究的主要内容。 当悬浮系统启动或稳定运行时受到外界扰动其中的一个电磁悬浮系统会偏离原来的 平衡位置，由于耦合关系的存在必然会影响到其他电磁悬浮系统的正常工作，这样一 来就会影响到整个系统的悬浮气隙，使得加工工件的精确度的降低。为了解决耦合因 素对电磁悬浮系统的影响，采用解耦控制策略将两个电磁悬浮系统解耦成两个独立的</span><span style="font-family: 宋体;">电磁悬浮系统。</span></span></p> <p class="21" style="margin-top:0cm;margin-right:0cm;margin-bottom:20.25pt; margin-left:0cm;text-align:justify;text-justify:inter-ideograph;text-indent: 26.0pt;line-height:23.3pt;mso-line-height-rule:exactly;background:transparent"> </p> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">本文采摘自“数控加工中心龙门磁悬浮系统耦合分析及控制研究”，因为编辑困难导致有些函数、表格、图片、内容无法显示，有需要者可以在网络中查找相关文章！本文由伯特利数控整理发表文章均来自网络仅供学习参考，转载请注明！</span><span lang="EN-US" style="font-size:9.0pt"> <o:p></o:p></span></p> </div></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <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'>龙门加工中心</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' target='_blank'>数控加工中心</a> <a 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<p>在机测量技术由于其成本低、检测效率高、无需二次装夹等优势被广泛用于零件加工测量当中，使得五轴加工中心和五轴钻攻中心，同时又兼具测量功能。在机测量系统的构成如图1所示，硬件部分主要是由高精度探头、信号接收器、机床整个本体，软件部分由机床控制系统、测量软件等组成[8]。待零件加工完成… <a href="/bethel/5-aix/show-2959.html" target="_blank">[了解更多]</a></p> </div> <div class="news-list list-border list-border-w"> <div class="list-date"> <span>05</span> <p>2024-11</p> </div> <h4><a title="五轴加工中心进给系统动态误差影响因素" href="/bethel/5-aix/show-2958.html" target="_blank">五轴加工中心进给系统动态误差影响因素</a></h4> <p>加工精度是影响机床性能和产品质量的主要难题，也是制约国家精密制造能力的重要因素。本文以五轴加工中心为对象，针对提升机床精度进行了研究。并且随着科技的发展，精密的仪器和零件在生产实践中占据的分量逐渐增加，在数控机床这种精密机器精度不断提高的同时，必须控制内外界环境的随机影响因素在… <a href="/bethel/5-aix/show-2958.html" target="_blank">[了解更多]</a></p> </div> <!-- 内容列表结束 --> </div> <!-- 相关文章结束 --> <!-- 页底推荐图文产品开始 --> <hr class="featurette-divider"> <!-- 页面标题开始 --> <div class="title"> <h3 class="wow bounceInDown" data-wow-delay="0.5s"><a href="/bethel/cnc">产品中心<small></small></a></h3> <span>——</span> </div> <!-- 页面标题结束 --> <div class="container"> <div class="blank30"></div> <!-- 中部开始 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