Particle Deposition Distribution of Multi-Rotor UAV-Based Fertilizer Spreader under Different Height and Speed Parameters

As an effective supplement to ground machinery, UAVs play important role in agriculture and have become indispensable intelligent equipment the development of precision agriculture. Various types agricultural UAV-based spreading devices, mainly disc-type pneumatic-type, appeared domestic foreign markets. rice topdressing has gradually a widely recognized application with great market potential. In process low-altitude fertilization, due existence rotor wind field, environment for particle air diffusion is complex, movement trajectory deposition distribution fertilizer are affected by many factors, resulting large differences spreading. The flight height speed influence on deposition, reasonable combination work parameters can be used efficient high-quality deposition. order obtain better distribution, this paper uses method single line test analyze characteristics fertilization using multi-rotor at different heights speeds. swath width uniformity obtained via simulation overlapped route superposition were optimized appropriate ensure that amount during actual application. results show interaction both width, but it not simple linear relationship. On whole, as increases, coefficient variation decreases obvious when low. For R20, 2 m/s, first increases then increase height, difference 5 m larger than other heights. Under three working heights, same 4 m/s 6 also 7 9 m. T16, relatively good, height. Therefore, 7–6 9–4 will best operating R20 T16. However, considering dynamic meteorological appropriately lowered according crosswind operation. research provide scientific reference suggestions further improving effect fertilization.