[1]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.[doi:10.3969/j.issn.1001-0505.2004.06.012]
 Wu Nanxing,Sun Qinghong,et al.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.[doi:10.3969/j.issn.1001-0505.2004.06.012]
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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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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
34
期数:
2004年第6期
页码:
771-774
栏目:
自动化
出版日期:
2004-11-20

文章信息/Info

Title:
Study of influence on machine-tool dynamic characteristics of nonlinear friction and its compensation
作者:
吴南星12 孙庆鸿1 冯景华2
1 东南大学机械工程系,南京 210096; 2 景德镇陶瓷学院机电工程学院, 景德镇 333001
Author(s):
Wu Nanxing1 2 Sun Qinghong1 Feng Jinghua2
1 Department of Mechanical Engineering, Southeast University, Nanjing 210096, China
2 School of Mechanical and Electrical Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China
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
Keywords:
NC lathe feed system nonlinear friction dynamic characteristics parameter optimization friction compensation
分类号:
TP273
DOI:
10.3969/j.issn.1001-0505.2004.06.012
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.
Abstract:
The high-speed and high-precision numerical control(NC)lathe was investigated and the synthesized mathematics model with nonlinear friction of feed servo system was established. The influence of nonlinear friction on its dynamic characteristics was studied and the parameters of model was optimized using the genetic algorithms. The method avoid effectively local minimum problem occurring in the linear identification method and remove bad phenomena such as chopped top, dead zone and mutation, etc. The optimal results show that the trace precision was improved, and the method has high engineering values.

参考文献/References:

[1] Chen Y,Tlusty J.Effect of low-friction guideways and lead-screw flexibility on dynamics of high-speed machines [J]. Annals of the CIRP, 1995,44(1):353-356.
[2] Kao J Y,Yeh Z M,Tarng Y S,et al.A study of backlash on the motion accuracy of CNC lathes [J]. International Journal of Machine Tools Manufacture, 1996,36(5):539-550.
[3] Ebrahimi M,Whalley R.Analysis,modeling and simulation of stiffness in machine tool drives[J]. Computer and Industrial Engineering, 2000,38(2):93-105.
[4] 刘强,尔联洁,刘金琨.摩擦非线性环节的特性、建模与控制补偿综述[J].系统工程与电子技术,2002,24(11):45-52.
  Liu Qiang,Er Lianjie,Liu Jinkun.Overview of characteristics,modeling and compensation of nonlinear friction in servo system [J]. Systems Engineering and Electronics, 2002,24(11):45-52.(in Chinese)
[5] 周明,孙树栋.遗传算法原理及应用[M].北京:国防工业出版社,1999.18-24.
[6] 刘强,尔联洁,刘金琨.参数不确定机械伺服系统的鲁棒非线性摩擦补偿控制[J].自动化学报,2003,29(4):628-632.
  Liu Qiang,Er Lianjie,Liu Jinkun.Robust nonlinear friction compensation of mechanical servo system with time variable parameters [J].Acta Automatica Sinica,2003,29(4):628-632.(in Chinese)

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[1]郑伟中.外圆磨床砂轮架结构的动力学分析[J].东南大学学报(自然科学版),1982,12(1):78.[doi:10.3969/j.issn.1001-0505.1982.01.008]
 Zheng Wei-zhong.Analysis of the Structural Dynamics for the Wheel Head of a Cylindrical Grinding Machine[J].Journal of Southeast University (Natural Science Edition),1982,12(6):78.[doi:10.3969/j.issn.1001-0505.1982.01.008]

备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50375026)、江苏省“十五”重大科技攻关招标资助项目(BE2001068).
作者简介: 吴南星(1968—),男,博士生,副教授; 孙庆鸿(联系人),男,教授,博士生导师,sy2405@sina.com.
更新日期/Last Update: 2004-11-20