Structural optimization method of rice precision direct seed-metering device based on multi-index orthogonal...

Area of Science:

• Agricultural Engineering
• Precision Agriculture
• Mechanization

Background:

• Current rice seed metering device design often optimizes single indexes, leading to imbalanced performance.
• Improving the mechanization of rice planting requires enhanced seeding device performance.

Purpose of the Study:

• To propose and validate a multi-index orthogonal experimental method for optimizing rice direct seeding device structure.
• To enhance the overall performance of rice precision seed metering devices.

Main Methods:

• Utilized the Discrete Element Method-Multibody Dynamics (DEM-MBD) coupling method to identify key performance factors.
• Constructed an electric drive control test platform for multi-index orthogonal experiments.
• Optimized structural parameters using matrix analysis.

Main Results:

• Identified hole diameter, hole number, and adjustment angle as significant factors, in order of importance.
• Determined optimal parameters: 12 mm hole diameter, 10 holes, and 80° adjustment angle.
• Achieved a 93.07% seed qualification rate, 0% empty hole rate, and improved spacing uniformity.

Conclusions:

• The proposed multi-index optimization method effectively improves the overall performance of rice direct seeding devices.
• This study provides a valuable technical reference for developing new rice precision seed metering devices.