Authors

Abstract

To improve the fertilization accuracy and distribution uniformity of nitrogen fertilizer, control method of working parameters coordinate match was proposed in this paper. Take minimum coefficient of variation as criterion, the nearly-optimal set of exposure length and rotational speed was solved based on regression models with known values of target fertilizer amount and operating speed, the interfaces were built to rapidly calculate related parameters. The static and dynamic experiments were conducted to verify the reliability and accuracy of regression models and control method; the results showed that under static conditions, the biggest difference value of fertilizer amount is 0.22g per revolution; under dynamic conditions, the deviation of fertilizer amount is less than 4.01%, the maximum deviation of rotational speed is 2.74%. Those results indicate that the control method is practical and feasible for fertilization operation.

Abstract in Chinese

为提高施肥作业精度和肥料分布均匀性，提出了一种基于目标施肥量和作业速度的排肥器开度和转速协调匹配控制方法。以各行排肥量一致性变异系数最小为优化准则，根据回归模型求解已知目标施肥量和作业速度下近优的排肥器开度和转速组合，并搭建了静态和动态测试界面。通过静态和动态试验对回归模型和控制方法进行了验证，静态条件下，最大排肥器单转排量偏差为0.22g；动态条件下，施肥量偏差均小于4.01%，马达实际平均转速与模型计算转速最大偏差为2.74%。结果表明本控制方法实用可行。