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基于Kriging元模型的機(jī)床進(jìn)給驅(qū)動系統(tǒng)動態(tài)特性優(yōu)化
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國家科技重大專項(xiàng)資助項(xiàng)目(2011ZX04016—021)


Dynamic Characteristic Optimization of Feed System Based on Kriging Metamodel
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    摘要:

    提出一種基于改進(jìn)Kriging元模型的機(jī)床進(jìn)給系統(tǒng)動態(tài)特性優(yōu)化方法,。在推導(dǎo)滾珠絲杠副動力學(xué)模型,，建立準(zhǔn)確進(jìn)給驅(qū)動多柔體模型的基礎(chǔ)上,，在實(shí)際裝配邊界條件下,，以立柱為設(shè)計(jì)對象,，以刀具位置中心點(diǎn)的振動加速度最大偏離比為動態(tài)特性直觀評價(jià)指標(biāo),，采用可信參數(shù)更新元模型對進(jìn)給系統(tǒng)的動態(tài)特性進(jìn)行優(yōu)化,，在不增加質(zhì)量的前提下,，刀具位置中心點(diǎn)的進(jìn)給向振動加速度最大偏離比降低了8.7%,，從而最終實(shí)現(xiàn)立柱結(jié)構(gòu)改進(jìn),、伺服電動機(jī)至刀具端的進(jìn)給系統(tǒng)的動態(tài)特性改善。

    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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楊勇,張為民,楊濤.基于Kriging元模型的機(jī)床進(jìn)給驅(qū)動系統(tǒng)動態(tài)特性優(yōu)化[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(5):288-293. Yang Yong, Zhang Weimin, 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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  • 在線發(fā)布日期: 2013-04-28
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