立铣加工系统建模及参数辨识方法  

Study on Modeling of Milling Processing System and Parameter Identification Algorithm

作　　者：刘宇[1] 李天翔[1] 张义民[1] 戴丽[1] 吕春梅[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819

出　　处：《振动．测试与诊断》2014年第5期868-872,976,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51105067;51135003);"高档数控机床与基础制造装备"科技重大专项课题资助项目(2013ZX04011011)

摘　　要：针对立铣加工系统动力学建模问题,笔者提出了一种立铣刀与刀柄结合部的模型。建立了坐标系,定义了子结构及结合部的导纳函数。采用包含了线性刚度和扭转刚度及相应阻尼项的刚度矩阵表征结合部。采用导纳综合法分析了其耦合导纳函数。研究了基于遗传算法辨识模型刚度和阻尼参数的方法,算例及试验研究结果表明遗传算法辨识模型参数准确,与试验测试一致性较好。Aimed at the issue of modeling end milling process systems,this paper proposes a two-component dynamic model for assembly.The coordinate systems are established,and the receptance of the substructures and combination unit are defined.A complex frequency-dependent stiffness matrix that contains linear stiffness,rotation stiffness and damping are adopted to describe the dynamical model of the combination unit.Receptance coupling substructure analysis is employed to predict the dynamics of the whole assembly.Based on the genetic algorithm,the value of stiffness and damping are identified.A case study proves that the proposed method has good precision to identify the parameters.

关 键 词：遗传算法 立铣 建模 参数识别 导纳综合 

分 类 号：TP113.1[自动化与计算机技术—控制理论与控制工程]