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高速空間并聯(lián)式坐標(biāo)測量機(jī)動(dòng)力學(xué)優(yōu)化設(shè)計(jì)
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國家自然科學(xué)基金資助項(xiàng)目（51005138）;山東省高等學(xué)?？萍加?jì)劃項(xiàng)目（J09LD54）


Dynamics Optimization Design of High-speed Spatial Parallel Coordinate Measuring Machine
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    摘要:

    為了改善高速空間并聯(lián)式坐標(biāo)測量機(jī)的動(dòng)力學(xué)性能，將虛擬樣機(jī)技術(shù)應(yīng)用于該測量機(jī)的彈性動(dòng)力學(xué)優(yōu)化設(shè)計(jì)中。協(xié)同利用CAD、CAE和可視化虛擬樣機(jī)技術(shù)，建立高速空間并聯(lián)式坐標(biāo)測量機(jī)的剛?cè)狁詈咸摂M樣機(jī)，分別考察動(dòng)平臺(tái)質(zhì)量與驅(qū)動(dòng)桿軸徑的變化對測量機(jī)運(yùn)動(dòng)輸出誤差及驅(qū)動(dòng)桿最大動(dòng)應(yīng)力等動(dòng)力學(xué)行為的影響規(guī)律，并據(jù)此對這些參數(shù)進(jìn)行優(yōu)化設(shè)計(jì)，得到測量機(jī)動(dòng)平臺(tái)質(zhì)量為80.85kg，驅(qū)動(dòng)桿軸徑為44mm。仿真結(jié)果表明，經(jīng)過優(yōu)化設(shè)計(jì)，測量機(jī)驅(qū)動(dòng)桿最大動(dòng)應(yīng)力降為17.5MPa，運(yùn)動(dòng)輸出誤差也明顯小于優(yōu)化設(shè)計(jì)前，測量機(jī)的動(dòng)力學(xué)特性得到明顯改善。

    Abstract:

    In order to improve dynamic characteristics of high-speed spatial PCMM (parallel coordinate measuring machine), the virtual prototype technology was applied to the elastodynamics optimization design of PCMM. Integrating CAD, CAE and visual technologies, the rigid-flexible virtual prototyping of PCMM was built. The influence law of the mass of moving platform and the diameter of driving limbs on the dynamic behaviors, including kinematics output response and maximum dynamic stress of driving limbs were discussed. On these grounds, the mass of moving platform and the diameter of driving limbs were optimized. The optimal results, which include the mass of moving platform of 80.85kg and the diameter of driving limbs of 44mm, were obtained. The simulation results showed the maximum dynamic stress of driving limbs were decreased to 17.5MPa, the kinematics output response were also reduced, so that the obvious improvement of the dynamics characteristics for PCMM was realized, and the powerful theoretical basis and method were provided.

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陳修龍,賈帥帥,鄧昱.高速空間并聯(lián)式坐標(biāo)測量機(jī)動(dòng)力學(xué)優(yōu)化設(shè)計(jì)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(3):213-218. Chen Xiulong, Jia Shuaishuai, Deng Yu. Dynamics Optimization Design of High-speed Spatial Parallel Coordinate Measuring Machine[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(3):213-218.

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  • 在線發(fā)布日期: 2012-03-17
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