| 机床进给伺服系统非线性摩擦特性及控制补偿研究 |
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| 引用本文： | 吴南星,孙庆鸿,冯景华.机床进给伺服系统非线性摩擦特性及控制补偿研究[J].东南大学学报(自然科学版),2004,34(6):771-774. |
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| 作者姓名： | 吴南星 孙庆鸿 冯景华 |
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| 作者单位： | 东南大学机械工程系,南京,210096;景德镇陶瓷学院机电工程学院,景德镇,333001;东南大学机械工程系,南京,210096;景德镇陶瓷学院机电工程学院,景德镇,333001 |
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| 基金项目： | 国家自然科学基金资助项目 (5 0 3 75 0 2 6)，江苏省“十五”重大科技攻关招标资助项目 (BE2 0 0 10 68) . |
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| 摘 要： | 以高速高精度数控车床为研究对象，建立了包括摩擦非线性因素的进给伺服系统综合数学模型．研究了非线性摩擦对其动态特性的影响，并采用遗传算法对模型参数进行了优化，有效地避免了采用线性优化方法时易出现的局部极小的问题，消除了因非线性摩擦而产生的“削顶”、“死区”和“突变”等不良现象．通过优化结果验证表明，系统的跟踪精度得到了较大的提高，有很好的工程实用价值．
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| 关 键 词： | 数控车床 进给系统 非线性摩擦 动态特性 参数优化 摩擦补偿 |
| 文章编号： | 1001-0505(2004)06-0771-04 |
Study of influence on machine-tool dynamic characteristics of nonlinear friction and its compensation |
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| Wu Nanxing , Sun Qinghong Feng Jinghu a.Study of influence on machine-tool dynamic characteristics of nonlinear friction and its compensation[J].Journal of Southeast University(Natural Science Edition),2004,34(6):771-774. |
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| Authors: | Wu Nanxing Sun Qinghong Feng Jinghu a |
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| Institution: | Wu Nanxing 1,2 Sun Qinghong1 Feng Jinghu a2 |
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| Abstract: | The high-speed and high-precision numerical control (NC) lathe was investig ated and the synthesized mathematics model with nonlinear friction of feed servo system was established. The influence of nonlinear friction on its dynamic char acteristics was studied and the parameters of model was optimized using the gen etic algorithms. The method avoid effectively local minimum problem occurring in the linear identification method and remove bad ph enomena such as chopped top, dead zone and mutation, etc. The optimal results show that the tra ce precision was improved, and the method has high engineering values. |
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| Keywords: | NC lathe feed system nonlinear fr iction dynamic characteristics parameter optimization friction compensation |
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