■为了提高水稻种植的机械化水平,设计了一种新型水稻直播装置。该装置的结构特性对于确定其播种性能至关重要。目前排种装置设计过程中的结构优化主要集中在单一或少数指标上,导致个人绩效提高,但整体绩效不平衡。因此,提出了一种基于多指标正交试验的直播装置结构优化方法。
■首先,DEM-MBD耦合方法观察了影响整体性能的因素和水平。第二,构建了基于电气传动控制模型的测试平台,设计了多指标正交试验。最后,基于矩阵分析对排种装置的结构参数进行了优化。
■从结果来看,一级和二级因素的显著性如下:孔径>孔数>调整角度。以下是通过优化分析找到的最佳参数:孔的直径为12mm,孔的数量为10,调整角度为80°。基于最优结构参数组合进行验证试验并进行分析。每洞种子的合格率,空孔率,平均种子数,种子数变异系数,平均孔间距,孔间距的变异系数为93.07%,0%,9.39,14.04%,22.84cm,和9.14%,分别。
■与传统的水稻精密排种装置设计和结构参数优化方法相比,本研究不仅为提高水稻精密排种装置的整体性能提供了优化方案,同时也为新型水稻精密测种装置的开发设计提供了技术参考。
UNASSIGNED: To improve the mechanization level of rice planting, a new type of direct seeding device for rice was designed. The device\'s structural properties will be crucial in determining its seeding performance. Structure optimization in the current seed metering device design process focuses on a single or few indexes, resulting in improved individual performance but imbalanced overall performance. Therefore, a structure optimization method of the direct seeding device based on a multi-index orthogonal experiment was proposed in this study.
UNASSIGNED: First, the DEM-MBD coupling method observed the factors and levels that affected the performance overall. Second, a test platform based on the electric drive control model was constructed, and a multi-index orthogonal test was devised. Finally, the structural parameters of the seed metering devices were optimized based on matrix analysis.
UNASSIGNED: From the results, the primary and secondary levels of significance of factors were just as follows: hole diameter > hole number > adjustment angle. The following are the optimal parameters found by optimization analysis: the diameter of the hole was 12 mm, the number of holes was 10, and the adjustment angle was 80°. Validation tests were carried out and analyzed based on the optimal structural parameter combination. The qualification rate of seeds per hole, empty hole rate, average seed number, coefficient of variation of seed number, average hole spacing, and the variance coefficient of hole spacing are 93.07%, 0%, 9.39,14.04%, 22.84 cm, and 9.14%, respectively.
UNASSIGNED: In comparison to traditional design and structural parameter optimization methods for rice precision seed metering device, this study not just to provides an optimization scheme for improving the overall performance of rice precision seed metering device, but also serves as a technical reference for the development and design of new rice precision seed metering device.