| 摘要: |
| 为了测试免耕播种机的运动特性对播种质量的影响，从动力学振动角度建立了免耕播种机运动的线性模型。利用该模型，采用MATLAB软件对Great Plains公司的1205NT型免耕播种机进行分析研究。结果表明：在田间作业条件下，随着前进速度的增大免耕播种机的谐振振幅从-27dB增大到-14．8dB，谐振频率从14．6Hz上升到23．3Hz。播种过程中的振动引起了种子覆土深度的相应波动，从而影响免耕播种机的播种性能。所建立的线性模型基本可靠，较真实地反映了免耕播种机的运动特性。 |
| 关键词: 免耕播种机 运动特性 线性模型 MATLAB |
| DOI：10.11841/j.issn.1007-4333.2004.06.153 |
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| Linear-model analysis of no-tilling seeding motion |
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| Abstract: |
| The paper introduces a linear model of no-tilling seeding movement, in order to dessribe the relation of the movement character of no-tilling seeding to sowing quality. Analyses of the 1205NT no-tiller with MATLAB showed that with in creasing working speed of no-tilling seeding, the resonance amplitude increases from -27?dB to -14.8?dB, and resonance frequency enhances from 14.6?Hz to 23.3?Hz. Vibration affects seed depth in the course of seeding and restricts sowing performance of no-tilling seeding. A conclusion is drawn that the model is suitable, because it can truly reflect the movement of no-tilling seeding. |
| Key words: no-till seeding,movement character,linear-mode,MATLAB |
