| 基于Kriging元模型的机床进给驱动系统动态特性优化 |
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| 引用本文： | 杨勇,张为民,杨涛. 基于Kriging元模型的机床进给驱动系统动态特性优化[J]. 农业机械学报, 2013, 44(5): 288-293 |
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| 作者姓名： | 杨勇 张为民 杨涛 |
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| 作者单位： | 1. 同济大学机械工程学院,上海,201804
2. 同济大学机械工程学院,上海201804;同济大学中德学院,上海200092 |
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| 基金项目： | 国家科技重大专项资助项目(2011ZX04016—021) |
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| 摘 要： | 提出一种基于改进Kriging元模型的机床进给系统动态特性优化方法.在推导滚珠丝杠副动力学模型,建立准确进给驱动多柔体模型的基础上,在实际装配边界条件下,以立柱为设计对象,以刀具位置中心点的振动加速度最大偏离比为动态特性直观评价指标,采用可信参数更新元模型对进给系统的动态特性进行优化,在不增加质量的前提下,刀具位置中心点的进给向振动加速度最大偏离比降低了8.7％,从而最终实现立柱结构改进、伺服电动机至刀具端的进给系统的动态特性改善.
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| 关 键 词： | 机床 进给系统 动态特性优化 元模型 |
Dynamic Characteristic Optimization of Feed System Based on Kriging Metamodel |
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| Yang Yong,Zhang Weimin and Yang Tao. Dynamic Characteristic Optimization of Feed System Based on Kriging Metamodel[J]. Transactions of the Chinese Society for Agricultural Machinery, 2013, 44(5): 288-293 |
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| Authors: | Yang Yong Zhang Weimin Yang Tao |
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| Affiliation: | Tongji University;Tongji University;Tongji University |
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| Abstract: | A dynamic characteristic optimization method of feed system based on improved Kriging metamodel was proposed. On the foundation of dynamic model derivation of screw-nut assembly and accurate multi-flexible body dynamic model of feed drive system, the dynamic characteristic of feed system was optimized by taking the Kriging metamodel based on the trust parameters update with the assessment of tool motion (maximum ratio of vibration acceleration), which adopted the column as the design object under the condition of assembly. The optimization result showed that both the structure of column and dynamic performance of feed system from motor to tool were improved. |
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| Keywords: | Machine tool Feed system Dynamic characteristic optimization Metamodel |
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