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基于5R并聯(lián)機(jī)構(gòu)的二自由度樹冠振動(dòng)裝置設(shè)計(jì)與試驗(yàn)
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國家自然科學(xué)基金項(xiàng)目(31971798)、國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2022YFD2202103),、浙江省“領(lǐng)雁”研發(fā)攻關(guān)計(jì)劃項(xiàng)目(2022C02057),、浙江省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2019C02065)、浙江省151人才培養(yǎng)計(jì)劃項(xiàng)目和浙江省高校中青年學(xué)科帶頭人培養(yǎng)項(xiàng)目


Design and Experiment of Two-degree-of-freedom Canopy Shaking Equipment Based on 5R Parallel Mechanism
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    摘要:

    振動(dòng)式采收是一種高效的林果機(jī)械化采收形式,。在現(xiàn)有的激振形式中,,非圓周激勵(lì)可以使果樹產(chǎn)生有效的振動(dòng),實(shí)現(xiàn)整體采收效果,。為進(jìn)一步提高果實(shí)的采收效率,,針對非圓周激勵(lì)中不同類型旋輪線軌跡進(jìn)行深入研究。通過SolidWorks,、ANSYS,、ADAMS等軟件建立果樹柔性體模型。將不同軌跡參數(shù)的旋輪線位移載荷導(dǎo)入ADAMS,,施加于果樹模型激振點(diǎn),。比較不同軌跡的旋輪線位移載荷下果樹模型的振動(dòng)響應(yīng),確定3支線1號外旋輪線軌跡E為最優(yōu)激振軌跡,。根據(jù)最優(yōu)激振軌跡,,設(shè)計(jì)了由平面5R并聯(lián)機(jī)構(gòu)驅(qū)動(dòng)的二自由度樹冠振動(dòng)裝置。以油茶樹為激振對象,,確定頻率6Hz,、振幅90mm為激振參數(shù),設(shè)計(jì)并搭建樣機(jī)進(jìn)行試驗(yàn),。試驗(yàn)結(jié)果表明,,7×7交錯(cuò)分布的激振桿布局方式的激振效果最優(yōu),該布局下樹冠平均合成加速度響應(yīng)為22.38m/s2,,激振加速度傳遞效率為77.63%,,驗(yàn)證了二維激振軌跡的有效性。

    Abstract:

    Vibratory harvesting is an efficient form of mechanized harvesting of tree fruits. In the existing excitation form, non-circular excitation can produce effective vibrations in fruit trees, which can achieve an overall harvesting effect. In order to further improve the harvesting efficiency of fruits, the trajectories of different types of cycloid in non-circular excitation were researched in depth. Fruit tree flexible body models were built through SolidWorks, ANSYS, ADAMS and other software. The cycloid displacement loads of different trajectory parameters were imported into ADAMS, being applied to the excitation point of fruit tree model. By comparing the responses of the tree model to the cycloid displacement loads of different trajectories, the 3-branch No. 1 epitrochoid trajectory E was determined as the optimal excitation trajectory. According to the optimal excitation trajectory, a two-degree-of-freedom canopy shaking equipment driven by a 5R parallel mechanism was designed. The Camellia oleifera-tree was used as the shaking object, and the excitation frequency of 6Hz and amplitude of 90mm were determined. An experiment prototype was designed and built. Experimental results showed that the shaking rod layout with 7×7 staggered distribution was the optimal layout, and the average synthetic acceleration of the canopy under this layout was 22.38m/s2. The excitation acceleration transmission efficiency under the shaking rod layout was 77.63%, which verified the effectiveness of the two-dimensional excitation trajectory.

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杜小強(qiáng),韓鑫濤,沈騰飛,李松濤,賀磊盈.基于5R并聯(lián)機(jī)構(gòu)的二自由度樹冠振動(dòng)裝置設(shè)計(jì)與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2023,54(4):96-106. DU Xiaoqiang, HAN Xintao, SHEN Tengfei, LI Songtao, HE Leiying. Design and Experiment of Two-degree-of-freedom Canopy Shaking Equipment Based on 5R Parallel Mechanism[J]. Transactions of the Chinese Society for Agricultural Machinery,2023,54(4):96-106.

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  • 收稿日期:2022-06-14
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  • 在線發(fā)布日期: 2022-08-01
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