数控机床导轨结合部动态特性参数优化识别方法研究  

An Optimum Identification Method of Dynamic Characteristic Parameters of Guideway Joint on a NC Machine Tool

作　　者：孙明楠[1] 米良[1] 干静[1] 殷国富[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2012年第3期217-223,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家科技重大专项资助项目(2010ZX04015-011);四川省高新技术产业重大关键技术资助项目(2010GZ0051)

摘　　要：数控机床结合部动力学参数识别是机床动力学分析中至关重要的一个环节。针对企业精密卧式加工中心动力学设计的需要,在对该加工中心导轨部件进行模态试验的基础上,提出了一种将模态实验数据与有限元分析模型相集成的导轨结合部动力学参数的优化识别方法。该方法以试验所得各阶模态频率与阻尼比为优化目标,在Matlab与Ansys的集成环境下建立优化任务,采用基于Armijo搜索准则的拟牛顿BFGS算法对结合部动力学参数优化计算。导轨结合部动力学参数优化识别结果表明,所提出优化识别算法的收敛性好、精度能满足工程应用需要。The identification of joint dynamic characteristic parameters is one of the most important parts of machine tool dynamic analysis.To satisfy the dynamic design requirements for a precision horizontal machining center in an enterprise class application,an optimum identification method was proposed by the integration of the modal test data of a linear guideway with the finite element analysis.Adopting the modal frequencies and damping ratios as the optimum objectives,the method conducted optimum calculations on the dynamic parameters of the guideway joint using the Armijo rule based Quasi-Newton BFGS algorithm in a Matlab-Ansys integrated environment.Optimized results showed that the method proposed is of good quality of convergence,and their precision meets the requirements of engineering applications.

关 键 词：导轨结合部 模态试验 动力学参数 优化识别 

分 类 号：TH113[机械工程—机械设计及理论]