DETERMINATION OF PHYSICAL PARAMETERS OF PELLETED RICE SEEDS AND CALIBRATION OF DISCRETE ELEMENT SIMULATION PARAMETERS

The calibration of parameters for pelleted rice seeds (PR) is crucial for enhancing research on PR-related machinery and for executing high-speed precision hole sowing with unmanned aerial vehicles. This paper focuses on determining the fundamental physical and contact parameters of PR. A series of tests were conducted, including the Plackett-Burman test, the steepest ascent test, and the Box-Behnken test, using the stacking angle as the primary variable. These tests led to the identification of optimal combinations of simulation parameters. Specifically, the coefficients of rolling friction for the PR-PLA plate and PR-PR were measured at 0.137, while the coefficient of static friction for the PR-PLA plate was 0.336. This study provides a reference for calibrating simulation parameters of pelleted seeds and research on high-speed precision seeding.