摘要
针对现有液体静压主轴运动误差分析及优化的不足,基于液体静压主轴的结构参数,建立了主轴运动误差的动力学模型,定量分析了在不平衡质量作用下主轴转子不同转速下的动态参数变化规律。以主轴运动误差数学模型作为目标函数,以主轴系统参数作为设计变量,采用遗传算法对液体静压主轴系统的运动误差进行优化分析。单一因素优化分析时,主轴系统径向误差运动x、y、主轴倾角θ的优化效率分别为41.22%、25.21%、66.16%,多目标优化时效率为4.7%。优化后的主轴运动精度都有了显著的提高,并得到了提高液体静压主轴运动精度的结构参数组合。
In view of lack of analysis and optimization of existing hydrostatic spindle motion errors,a dynamic model of the spindle motion error is constructed based on structural parameters,and the laws of dynamic parameters of the spindle rotor at different rotational speeds with an unbalanced mass are quantitatively analyzed.The mathematical model of the spindle motion error is taken as the objective function,and the spindle system parameters are used as design variables.Genetic algorithm is adopted to optimize the motion error of the hydrostatic spindle system.In the single-factor optimization analysis,the optimization efficiency for the radial error motions x and y of the spindle system and the spindle inclination angleθreaches 41.22%,25.21%and 66.16%,respectively,and the efficiency gets 4.7%during multi-objective optimization.The optimized spindle motion accuracy is significantly improved,and a combination of structural parameters is obtained to heighten the hydraulic static pressure spindle motion accuracy.
作者
陈东菊
李源
查春青
潘日
范晋伟
CHEN Dongju;LI Yuan;ZHA Chunqing;PAN Ri;FAN Jinwei(Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Beijing University of Technology, Beijing 100124, China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2020年第6期90-98,共9页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51875005,51475010)。
关键词
超精密加工
液体静压主轴
运动误差
动态参数
遗传算法
ultra-precision machining
hydrostatic spindle
motion error
dynamic parameter
genetic algorithm
