Mathematical Modelling and Optimization of the Performance of a Metering Unit for Precision Corn Seeding
Makaleler > Tam Makale · 2010
Yazarlar: Arzu YAZGI, Adnan DEĞİRMENCİOĞLU, İsmet Önal, Emine Bayram
\n Volume: 6, Issue: 2\n 107-113\n \n, Uluslararası, 2010, cilt 6, ss 107-113
Özet
The objective of this study was to develop mathematical functions and to optimize the performance of a vacuum type precision seeder for metering corn seeds. The variables considered in the study were the seed hole diameter, peripheral speed of the vacuum plate and vacuum on vacuum plate. The experimental study was conducted in the laboratory on a sticky belt and the seed distribution in a row was investigated based on Multiple Index, Miss Index, Quality of Feed Index, Root Mean Square Error (Erms) and the Coefficient of Precision (CP3). For the experiments, the level of the peripheral speed of the plate was 0.053, 0.08, 0.12, 0.16 and 0.19 m/s corresponding forward speed of the seeder was 0.52, 0.8, 1.2, 1.6 and 1.87 m/s), the diameter of the holes drilled on the vacuum plate was selected to be 2.32, 3, 4, 5 and 5.68 mm, five levels of the vacuum pressure were 26.4, 40, 60, 80 and 93.6 mbar. Response Surface Methodology was applied to optimize the performance of the seeder and the experiments were conducted using Central Composite Design (CCD). The results obtained from the experiments based on CCD that use five different levels for each variable were used to develop a polynomial function in quadratic form for corn seeds. From these mathematical functions, the optimum level of each variable was obtained in the study. The optimum level of the peripheral speed of the vacuum plate (0.068 m/s), hole diameter (3.77 mm) and vacuum pressure (76.75 mbar) were verified in the lab and under field conditions.