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style="font-family: MingLiU;">1.<span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><span class="53">五轴数控加工中心软</span></a><span class="53SimHei" style="line-height: 15pt; text-indent: 0cm; background-color: transparent;"><span lang="EN-US" style="font-size: 15pt;">PLC</span></span><span class="53" style="line-height: 15pt; text-indent: 0cm; background-color: transparent;">系统运行平台及总体结构</span></p> <div class="Section1"> <p class="530" style="margin-top:0cm;margin-right:0cm;margin-bottom:17.85pt; margin-left:41.0pt;text-indent:0cm;line-height:15.0pt;mso-line-height-rule: exactly;mso-pagination:lines-together;page-break-after:avoid;mso-list:l0 level1 lfo1; background:transparent"><o:p></o:p></p> <p class="60" align="left" style="margin: 0cm 0cm 19.9pt; line-height: 14pt; page-break-after: avoid; background: transparent;"><a name="bookmark9"><span class="6"><span style="font-family: SimSun;">2.1</span></span></a><span class="6">软</span><span class="6MicrosoftSansSerif"><span lang="EN-US" style="font-size: 13pt;">PLC</span></span><span class="6">系统运行平台的选择</span></p> <p class="351" style="margin-bottom:13.65pt;line-height:10.5pt;mso-line-height-rule: exactly;background:transparent"><st1:chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on"><span class="350"><span lang="EN-US">2. 1.1</span></span></st1:chsdate><span class="350">控制方案选择</span><span lang="EN-US"><o:p></o:p></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.2pt;mso-line-height-rule: exactly;background:transparent"><span class="2">软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">是运行在计算机上的应用软件，需要硬件平台和操作系统的支持。 根据当前软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">系统运行硬件平台的不同，有以下三种控制方案</span><span class="2"><sup><span style="font-family: SimSun;">[3Q]</span></sup></span><span class="2"><span style="font-family: SimSun;">:</span></span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:23.15pt; margin-left:32.0pt;text-indent:0cm;line-height:19.2pt;mso-line-height-rule: exactly;background:transparent"><span class="21pt"><span style="font-family: SimSun;">(1)</span></span><span class="21pt">基于传统</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">的控制方案。</span></p> <!--[endif]--> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><span class="2">该方案以传统</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">硬件为运行平台</span><span class="2">，</span><span class="2">将厂商开发的软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">运行系统固化在</span><span class="2"> </span><span class="2">硬件上</span><span class="2">，</span><span class="2">通过</span><span class="2TimesNewRoman19"><span lang="EN-US">RS</span></span><span class="2"><span style="font-family: SimSun;">232</span></span><span class="2">串口及通讯协议下载开发系统中的用户</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">程序</span><span class="2">，</span><span class="2">在传统</span><span class="2"> </span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">硬件上运行后将控制信号输出。此方案保留了传统</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">的硬实时性。</span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:17.1pt; margin-left:32.0pt;text-indent:0cm;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><!--[if !supportLists]--><span class="2"><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="2">基于嵌入式控制器的控制方案。</span><span class="2"><o:p></o:p></span></p> <div> <table cellspacing="0" cellpadding="0" hspace="0" vspace="0" height="95" align="center"> <tbody> <tr> <td valign="top" align="left" height="95" style="padding-top:0cm;padding-right: 0cm;padding-bottom:0cm;padding-left:0cm"> <p class="120" style="line-height:19.2pt;mso-line-height-rule:exactly; background:transparent;mso-element:frame;mso-element-frame-height:71.3pt; mso-element-wrap:no-wrap-beside;mso-element-anchor-vertical:paragraph; mso-element-anchor-horizontal:column;mso-element-left:center;mso-element-top: .05pt"><span class="12">该方案是以嵌入式实时操作系统</span><span class="12">（</span><span class="12TimesNewRoman"><span lang="EN-US">VxWorks</span></span><span class="12">、</span><span class="12TimesNewRoman"><span lang="EN-US">pC</span></span><span class="12"><span style="font-family: SimSun;">/</span></span><span class="12TimesNewRoman"><span lang="EN-US">OS</span></span><span class="12"><span style="font-family: SimSun;">-</span></span><span class="12TimesNewRoman"><span lang="EN-US">II</span></span><span class="12">等</span><span class="12">）</span><span class="12">作为软件运行平</span><span class="12"> </span><span class="12">台</span><span class="12">，</span><span class="12">把软</span><span class="12TimesNewRoman"><span lang="EN-US">PLC</span></span><span class="12">运行系统做成固件嵌入到小型计算机系统中的控制器上</span><span class="12">，</span><span class="12">在</span><span class="12TimesNewRoman"><span lang="EN-US">Win</span></span><span class="12"><span style="font-family: SimSun;">32 </span></span><span class="12">环境下编写</span><span class="12TimesNewRoman"><span lang="EN-US">PLC</span></span><span class="12">控制程序</span><span class="12">，</span><span class="12">利用标准通讯协议下载用户程序交由</span><span class="12TimesNewRoman"><span lang="EN-US">PLC</span></span><span class="12">运行系统</span><span class="12"> </span><span class="12">运行</span><span class="12">，</span><span class="12">完成控制信号的输出。</span></p> </td> </tr> </tbody> </table> </div> <!--[if !supportTextWrap]--><br clear="ALL" /> <!--[endif]--> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:17.1pt; margin-left:32.0pt;text-indent:0cm;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><!--[if !supportLists]--><span class="12"><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span></span><!--[endif]--><span class="121pt"><span style="font-family: SimSun;">(3)</span></span><span class="121pt">基于通用</span><span class="12TimesNewRoman"><span lang="EN-US">PC</span></span><span class="12">的控制方案。</span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:17.1pt; margin-left:32.0pt;text-indent:0cm;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">该方案采用</span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">Windows</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">NT</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">、</span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">RTLinux</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">等操作系统作为软件运行平台</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">，</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">软</span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">PLC</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">的开发系统和运行系统可独立运行在同一台计算机系统上</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">，</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">软</span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">PLC</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">运行系统利</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;"> </span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">用通用</span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">I</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;"><span style="font-family: SimSun;">/</span></span><span class="12TimesNewRoman" style="line-height: 25.9333324432373px; text-align: justify;"><span lang="EN-US">O</span></span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">板卡或现场总线对外部设备进行控制</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">，</span><span class="12" style="line-height: 25.9333324432373px; text-align: justify;">易于实现工业的网络化控制。</span></p> <!--[endif]--> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:17.1pt; margin-left:32.0pt;text-indent:0cm;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><!--[if !supportLists]--><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span><!--[endif]--><span class="12">基于</span><span class="12TimesNewRoman"><span lang="EN-US">PC</span></span><span class="12">的软</span><span class="12TimesNewRoman"><span lang="EN-US">PLC</span></span><span class="12">控制方案能够充分利用</span><span class="12TimesNewRoman"><span lang="EN-US">PC</span></span><span class="12">机的高性能处理器进行大量复 杂数据的计算、具有开放的控制体系和丰富的软、硬件资源，易于维护、性价比 高等优点，适合开放式数控系统模块化、标准化、。而方案一和方案二的软</span><span class="12TimesNewRoman"><span lang="EN-US">PLC </span></span><span class="12">运行系统只能在特定的硬件环境中运行，并未实现真正意义上的开放，无法进行 升级，通用性较差。因此，本文选用基于</span><span class="12TimesNewRoman"><span lang="EN-US">PC</span></span><span class="12">的控制方案设计软</span><span class="12TimesNewRoman"><span lang="EN-US">PLC</span></span><span class="12">控制系统</span></p> <p class="351" style="margin-top:22.2pt;margin-right:0cm;margin-bottom:13.9pt; margin-left:0cm;line-height:10.5pt;mso-line-height-rule:exactly;background: transparent"><st1:chsdate year="1899" month="12" day="30" islunardate="False" isrocdate="False" w:st="on"><span class="350"><span lang="EN-US">2. 1.2</span></span></st1:chsdate><span class="350">实时操作系统的选择</span><span lang="EN-US"><o:p></o:p></span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:25.0pt;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><span class="2">数控系统中的轨迹插补模块是根据进给轴的位置信息进行插补运算，它需控 制系统在定时点调度插补功能来保证精确的插补周期，对操作系统的实时性要求 很高。同样软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">系统也必须具备一定的实时控制能力才足以完成对机床急停 信号、超程等信号的处理，虽然软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">本身并不具备实时性，但它的实时控制 功能可依靠操作系统的实时性来保证，因此选择一个开放的且适合的实时操作系 统尤为重要，常用的有以下几种实时操作系统：</span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-indent:32.0pt; line-height:19.45pt;mso-line-height-rule:exactly;background:transparent"><!--[if !supportLists]--><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span><!--[endif]--><span class="24pt">基于</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">的实时扩展操作系统 </span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">是一个窗口式的多任务操作系统，有利于人机界面的开发和多任务 的并行处理，虽然它不是实时操作系统，但通过改造系统内核可使位于</span><span class="2TimesNewRoman19"><span lang="EN-US">Ring</span></span><span class="2"><span style="font-family: SimSun;">3</span></span><span class="2">层 (最低特权级</span><span class="2">）</span><span class="2">的应用程序跃至</span><span class="2TimesNewRoman19"><span lang="EN-US">RingO</span></span><span class="2">层（最高特权级</span><span class="2">）</span><span class="2">直接访问</span><span class="2TimesNewRoman19"><span lang="EN-US">CPU</span></span><span class="2">和</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">机的硬件，从而实现</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">操作系统的实时性控制<sup>[31]</sup>。具体改造方法如下： 一种是直接对</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">系统内核进行改造，这是利用</span><span class="2TimesNewRoman19"><span lang="EN-US">RTX</span></span><span class="2">或</span><span class="2TimesNewRoman19"><span lang="EN-US">Intime</span></span><span class="2">等实时软件 向</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">系统内核增加实时补丁程序来直接访问</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">硬件设备。另一种是从系 统外部对</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">进行实时扩展。例如：利用某些软件工具对计算机定时器、 时钟芯片、中断控制器等</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">硬件进行直接操作，从而实现</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">数控系统所需的 实时控制功能。图</span><span class="2"><span style="font-family: SimSun;">2.4</span></span><span class="2">为基于</span><span class="2TimesNewRoman19"><span lang="EN-US">RTX</span></span><span class="2">的</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">实时扩展操作系统的基本结构。</span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:31.0pt;margin-bottom:.0001pt;text-indent:0cm;line-height:19.45pt; mso-line-height-rule:exactly;background:transparent"><span class="2"><span style="font-family: SimSun;">(2 )</span></span><span class="2">基于</span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">的实时操作系统<o:p></o:p></span></p> <p class="20" style="margin-top:0cm;margin-right:0cm;margin-bottom:0cm; margin-left:31.0pt;margin-bottom:.0001pt;text-indent:0cm;line-height:19.45pt; mso-line-height-rule:exactly;background:transparent"><span class="2TimesNewRoman19"><span lang="EN-US">Linux</span></span><span class="2">是一个支持多任务，具有开放的源代码和可向系统内核动态添加模块 的操作系统。美国新墨西哥工学院通过改造</span><span class="2TimesNewRoman19"><span lang="EN-US">Linux</span></span><span class="2">，</span><span class="2">开发出了 </span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">实时操作 系统。</span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">建立一个新的实时内核来控制</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">机的硬件，实现抢先式优先级 的调度，其基本结构如图</span><span class="2"><span style="font-family: SimSun;">2.5</span></span><span class="2">所示。由于实时内核可完全抢占</span><span class="2TimesNewRoman19"><span lang="EN-US">Linux</span></span><span class="2">的任务，所 以</span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">的响应速度特别快。即使在</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2"><span style="font-family: SimSun;">386</span></span><span class="2">机器上其中断响应不会超过15@ (微秒</span><span class="2">），</span><span class="2">因此</span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">能很好地满足</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">数控系统对实时性的要求。</span></p> <!--[endif]--> <p class="20" 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:19.45pt;mso-line-height-rule:exactly;tab-stops: 61.5pt;background:transparent"><!--[if !supportLists]--><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span><!--[endif]--><span class="2">基于嵌入式的实时操作系统</span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:19.45pt;mso-line-height-rule:exactly;background:transparent"><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">RTOS(Real Time Operating System,</span></span><span class="2">嵌入式实时操作系统</span><span class="2"><span style="font-family: SimSun;">)</span></span><span class="2">的软件代码小</span><span class="2">；</span><span class="2">软、</span><span class="2"> </span><span class="2">硬件可裁剪</span><span class="2">；</span><span class="2">具有良好的可靠性和稳定性</span><span class="2">，</span><span class="2">被应用于工业和军事中对系统响应要</span><span class="2"> </span><span class="2">求较高的设备。但</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">RTOS</span></span><span class="2">是一种专用的计算机系统</span><span class="2">，</span><span class="2">它不具备开放性这一特点</span><span class="2">， </span><span class="2">应用范围有限。典型的</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">RTOS</span></span><span class="2">产品如</span><span class="2TimesNewRoman19"><span style="font-family: 宋体;">：</span><span lang="EN-US">WindRiver</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2TimesNewRoman19"><span lang="EN-US">System</span></span><span class="2">公司的</span><span class="2TimesNewRoman19"><span lang="EN-US">VxWorks</span></span><span class="2"><span lang="EN-US">、</span></span><span class="2"><span lang="EN-US" style="font-family: SimSun;"> </span></span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">pC/OS-II </span></span><span class="2">以及 </span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">RTXC </span></span><span class="2">等等。</span></p> <p class="20" 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:19.45pt;mso-line-height-rule:exactly;tab-stops: 61.5pt;background:transparent"><!--[if !supportLists]--><span style="font-stretch: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> </span><!--[endif]--><span class="2">基于</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">DOS</span></span><span class="2">的实时操作系统</span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-align:justify; text-justify:inter-ideograph;text-indent:26.0pt;line-height:19.45pt;mso-line-height-rule: exactly;background:transparent"><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">DOS</span></span><span class="2">操作系统小巧灵活、稳定性好、可直接访问设备硬件层，被广泛应用 在工业控制领域。虽然</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">DOS</span></span><span class="2">是非实时单任务操作系统，但利用</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">DOS</span></span><span class="2">运行在</span><span class="2TimesNewRoman19"><span lang="EN-US">CPU </span></span><span class="2">实模式下，通过改写</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">中8259、实时时钟等可编程芯片或着硬件逻辑的控制字 以及内存中断矢量，可使数控系统软件能够运行和调度中断服务程序，进而实现 </span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">数控系统的实时任务以中断方式优先运行，非实时任务以循环方式后台运行。</span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:19.45pt;mso-line-height-rule:exactly;background:transparent"><span class="2">综上所述，基于</span><span class="2TimesNewRoman19"><span lang="EN-US">RTLinux</span></span><span class="2">开发的实时控制软件具有很好的开放性，但软件构 架没有一个统一标准，不能支持多数的硬件系统；基于嵌入式的实时操作系统是 一种专用的计算机控制系统，开发出的用户程序可移植性较差，不适合全软件数 控系统的发展；基于</span><span class="2TimesNewRoman17"><span lang="EN-US" style="font-size: 9pt;">DOS</span></span><span class="2">的实时操作系统功能比较简单，系统的灵活性较差， 不能充分发挥</span><span class="2TimesNewRoman19"><span lang="EN-US">PC</span></span><span class="2">机的软硬件资源；而</span><span class="2TimesNewRoman19"><span lang="EN-US">Windows</span></span><span class="2">操作系统不仅具有开放的体系结 构、良好的系统稳定性和较高的市场占有率，还提供了大量的</span><span class="2TimesNewRoman19"><span lang="EN-US">Win</span></span><span class="2"><span style="font-family: SimSun;">32 </span></span><span class="2TimesNewRoman19"><span lang="EN-US">API</span></span><span class="2">函数供 软件开发者使用。因此本文选用</span><span class="2TimesNewRoman19"><span lang="EN-US">WindowsXP</span></span><span class="2"><span style="font-family: SimSun;">+</span></span><span class="2TimesNewRoman19"><span lang="EN-US">RTX</span></span><span class="2"><span style="font-family: SimSun;">5.0</span></span><span class="2">实时扩展作为软</span><span class="2TimesNewRoman19"><span lang="EN-US">PLC</span></span><span class="2">控制 系统的软件开发和运行平台。</span></p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:19.45pt;mso-line-height-rule:exactly;background:transparent"> </p> <p class="20" style="margin:0cm;margin-bottom:.0001pt;text-indent:26.0pt; line-height:19.45pt;mso-line-height-rule:exactly;background:transparent"><span style="font-size:9.0pt;font-family:宋体;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: "Times New Roman";mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language: ZH-CN;mso-bidi-language:AR-SA">本文采摘自“五轴数控加工中心软</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Times New Roman";mso-fareast-font-family: 宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN; mso-bidi-language:AR-SA">PLC</span><span style="font-size:9.0pt;font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman";mso-font-kerning:1.0pt;mso-ansi-language: EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">控制系统的研究”，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></p> </div> <p><span style="font-size:11.0pt;font-family:宋体;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></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <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 href='/index.php?case=tag&act=show&tag=CNC%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>CNC加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E6%95%B0%E6%8E%A7%E6%9C%BA%E5%BA%8A' target='_blank'>数控机床</a> <a href='/index.php?case=tag&act=show&tag=%E4%BA%94%E8%BD%B4%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>五轴加工中心</a> <!-- 分类 --> <div class="blank10"></div> 分类： <a href='/bethel/type/jnc/type-1.html' target='_blank'>加工中心</a> <div class="blank30"></div> <!--自动调用自定义字段--> <div class="blank20"></div> <div class="blank30"></div> <!-- 投票 --> <script src="/index.php?case=vote&act=view&aid=936"></script> <!-- 自定义表单开始 --> <!-- 自定义表单结束 --> <div class="blank60"></div> <!-- 上下页开始 --> <div id="page"> <strong>上一篇</strong><a href="/bethel/news/show_935.html">五轴数控加工中心软PLC控制系统的研究-主要内容</a> <div class="blank10"></div> <strong>下一篇</strong><a href="/bethel/news/show_937.html">五轴数控加工中心数控系统的软件结构</a> </div> <!-- 上下页结束 --> </div><!-- /container --> <!-- 相关文章开始 --> 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