二次通用旋转组合设计在精量排种试验中的应用

Trial Application of Precise Sowing by Quadratic General Rotary Unitized Design

采用二次通用旋转组合设计对室内精量排种试验进行了优化设计。通过理论分析,选择真空度和排种轴转速作为试验因素,穴距合格率和空穴率作为试验指标,进行二因素三水平的二次通用旋转组合设计试验,并建立了数学模型。经过检验,模型拟合程度很好。对真空度和排种轴转速与穴距合格率和空穴率之间的影响趋势进行分析,得到了最佳参数组合的预测结果:真空度3.5k Pa,排种轴转速7.4r/min,穴距合格率93.5%,空穴率3.2%。实测值为:穴距合格率92.4%,空穴率1.8%,误差1.25%。由此说明,模型精确、可靠,为二次通用旋转设计在农机方面的试验研究提供了借鉴。

In this paper , quadratic general rotary unitized design was used for the optimization of indoor precision sowing test .Through theoretical analysis , choosing vacuum and seed shaft speed as experimental factors , right rate of seed dis-tance and rate of no seed hill as test targets ,made experiments oftwo factors and three levels and created a mathematical model .After inspection , the model is very good .Influence trend among the factors was analysed , forecasting results ofoptimal combination of parameters were obtained：the vacuum degree 3.5kPa, seed shaft speed 7.4r /min , right rate of seed distance of 93 .5%,rate of no seed hill of 3 .2%.Value points were measured：right rate of seed distance of 92.4%,rate of no seed hill of 1.8%,indicating that the model was accurate and reliable .