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id="tpnrxl7j" class="title"> <h3><a>數控機床可靠性評估技術國內外研宄現狀<small></small></a></h3> </div> <!-- 頁面標題結束 --> <hr class="featurette-divider"> <!-- 中部開始 --> <div id="tpnrxl7j" class="container"> <!-- 正文 --> <div id="tpnrxl7j" class="lead" id="print"> <p> <span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt;">可靠性建模評估主要有三個方向：基于強度干涉理論的可靠性建模</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt; vertical-align: super;">[49_51]</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt;">、 基于系統結構關系的可靠性建模</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt; vertical-align: super;">[52</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt;">_</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt; vertical-align: super;">53]</span><span style="line-height: 19.45pt; text-indent: 24pt; font-size: 9pt; font-family: 宋體; letter-spacing: 0pt;">及基于故障數據統計技術的可靠性建模</span></p> <p class="NewStyle18" style="margin: 0pt 0pt 0pt 9pt; text-indent: 24pt;"><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">最常用的可靠性建模是根據設備的故障間隔時間的分布模型來獲得相應的 可靠性指標，比較典型的分布有指數分布、對數正態分布、</span><span id="tpnrxl7j" class="16" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">Weibull</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">分布等等。 其中</span><span id="tpnrxl7j" class="16" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">Weibull</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">分布由于其優秀的數據擬合性能被廣泛運用于可靠性建模研究 </span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[56</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">_</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">58]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">。因此許多學者提出了各種各樣關于對</span><span id="tpnrxl7j" class="16" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">Weibull</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">分布進行參數估計的方法， 文獻</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[59]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">主要介紹了三種</span><span id="tpnrxl7j" class="16" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">Weibull</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">分布參數估計的方法，即極大似然估計法、變 異系數法和矩估計法，通過對三種參數估計方法計算結果進行對照和分析； </span><span id="tpnrxl7j" class="17" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">st</span><span id="tpnrxl7j" class="17" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt; vertical-align: sub;">epen</span><span id="tpnrxl7j" class="17" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">shin</span><span id="tpnrxl7j" class="17" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt; vertical-align: sub;">eyP</span><span id="tpnrxl7j" class="17" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[6Q]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">用矩估計法來解決三參數威布爾分布中的參數估計問題，并具 有計算快捷的優越性；文獻</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[61]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">提出運用數值計算方法來求解右截尾數據威布爾 參數值；其他模型諸如指數分布、對數正態分布及多重威布爾分布</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[62_64]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">也在相 應的領域得到運用；此外，文獻</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[65]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">提出了基于可修系統的可靠性建模方法；文 獻</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[66</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">_</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">67]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">提出用貝葉斯方法來解決小樣本數據的可靠性建模問題。</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;"><o:p></o:p></span></p> <p class="NewStyle18" style="margin-top:0.0000pt; margin-right:14.0000pt; margin-bottom:0.0000pt; margin-left:9.0000pt; text-indent:24.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">國內的數控機床可靠性研宄起步比較晚，直到上世紀八十年代數控機床可 靠性才引起部分學者的重視。以吉林大學數控裝備可信性研究所等為代表的科 研院所開始投入精力改進國內數控機床的性能和可靠性，在一系列國家重大項 目的支持下，我國的機床</span><span id="tpnrxl7j" class="16" style="font-family: Georgia; letter-spacing: 0pt; font-size: 9pt;">MTBF</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">值從兩百多小時提升到五百多小時，多年的項 目成果為國內數控機床可靠性研究奠定了基礎</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[68</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">_™</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">。賈</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[71]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">等人通過對機床故障 數據進行分布擬合、參數估計得到機床可靠性模型；文獻</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">[72</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">_</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt; vertical-align: super;">73]</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">也對數控機床的 可靠性建模和評估進行了實踐探討。</span><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;"><o:p></o:p></span></p> <p class="NewStyle18" style="margin-top:0.0000pt; margin-right:14.0000pt; margin-bottom:19.1500pt; margin-left:9.0000pt; text-indent:24.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;">傳統對于數控機床整機或子系統的可靠性建模主要是基于綜合可靠性的建 模，如果某一子系統持續受到其他子系統影響而出現故障，其綜合可靠度降低 會比較明顯，但是其本身固有可靠度的降低并不一定這么明顯。所以傳統的可 靠性建模及評價只是對設備的可靠性水平的綜合反映，而忽略了子系統之間的 故障相關性影響關系。除此之外，對于故障相關性影響的忽略也會導致對于子 系統故障風險評估的不準確。</span></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“基于故障率相關的加工中心的可靠性及風險評估”，因為編輯困難導致有些函數、表格、圖片、內容無法顯示，有需要者可以在網絡中查找相關文章！</span><span lang="EN-US" style="font-size:9.0pt"><o:p></o:p></span></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"">本文由伯特利數控整理發表文章均來自網絡僅供學習參考，轉載請注明！</span><span lang="EN-US" style="font-size:9.0pt"><o:p></o:p></span></p> <p class="NewStyle18" style="margin-top:0.0000pt; margin-right:14.0000pt; margin-bottom:19.1500pt; margin-left:9.0000pt; text-indent:24.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "> </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"">相關內容可查閱：主頁（</span><b><span lang="EN-US" style="font-size:9.0pt"><a ><span lang="EN-US" style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">加工中心</span></a></span></b><span style="font-size:9.0pt; font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）、產品頁（</span><b><span lang="EN-US" style="font-size:9.0pt"><a >CNC<span lang="EN-US" style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman""><span lang="EN-US">加工中心</span></span></a></span></b><span style="font-size:9.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）、文章頁（</span><b><span lang="EN-US" style="font-size:9.0pt"><a ><span lang="EN-US" style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">數控加工中心</span></a></span></b><span style="font-size:9.0pt;font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）</span><span lang="EN-US" style="font-size:9.0pt"><o:p></o:p></span></p> <p class="NewStyle18" style="margin-top:0.0000pt; margin-right:14.0000pt; margin-bottom:19.1500pt; margin-left:9.0000pt; text-indent:24.0000pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; "><span style="font-family: 宋體; letter-spacing: 0pt; font-size: 9pt;"><o:p></o:p></span></p></div> <div id="tpnrxl7j" class="blank30"></div> <!-- tag --> <div id="tpnrxl7j" class="blank10"></div> 標簽： <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'>數控加工中心</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=%E7%AB%8B%E5%BC%8F%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>立式加工中心</a> <a href='/index.php?case=tag&act=show&tag=%E7%BA%BF%E8%BD%A8%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>線軌加工中心</a> <a 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<span>11</span> <p>2024-12</p> </div> <h4><a title="U600S五軸加工中心視頻" href="/bethel/video/show-3042.html" target="_blank">U600S五軸加工中心視頻</a></h4> <p>此視頻詳細介紹了U600S高性能五軸加工中心各種參數及說明！… <a href="/bethel/video/show-3042.html" target="_blank">[了解更多]</a></p> </div> <div id="tpnrxl7j" class="news-list list-border list-border-w"> <div id="tpnrxl7j" class="list-date"> <span>05</span> <p>2024-11</p> </div> <h4><a title="六角亭五軸加工工藝" href="/bethel/5-aix/show-2966.html" target="_blank">六角亭五軸加工工藝</a></h4> <p>本文以組合式六角亭模型為實例，分析工藝難點與加工可行性，指出該模型的加工難點是模型形狀不規則和整體剛性差，并通過設計新的工藝方案解決加工難點，完成了模型整體的加工。新的加工工藝有助于提高加工效率和精度，為五軸數控加工提供了一個典型案例，對于五軸加工中心數控加工也具有指導作用和重要… <a href="/bethel/5-aix/show-2966.html" target="_blank">[了解更多]</a></p> </div> <div id="tpnrxl7j" class="news-list list-border list-border-w"> <div id="tpnrxl7j" class="list-date"> <span>05</span> <p>2024-11</p> </div> <h4><a title="自適應控制方法在混聯五軸加工中心中的應用" href="/bethel/5-aix/show-2965.html" target="_blank">自適應控制方法在混聯五軸加工中心中的應用</a></h4> <p>宇匠數控 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