Agricultural Unmanned Gyroplane Design And Droplets Distribution Experimental Research

With the development of aviation in recent years, agricultural aviation has become an important part of the agricultural field. The existing agricultural aviation aircraft is mainly fixed wing and helicopter, these two models for aviation in the mainstream models, the characteristics of the fixed wing are high-speed and efficient. The helicopter is characterized by hover, low flight speed, high energy consumption, these two models each have the characteristics. However, in the field of agriculture, the above two kinds of aircraft also have disadvantages, fixed wings need more runway, waste of agricultural land resources, and its speed is high and more spraying drift, bad spraying effect; helicopter energy consumption, high maintenance costs, low efficiency. After recognizing the shortcomings of these two models, and in this paper, the design of a rotor wing aircraft is used in this paper, its features are simple structure, low cost, high efficiency, low speed flying, short takeoff distance, its flight characteristics are suitable for agricultural aviation. And, this paper will be designed for unmanned rotor aircraft to reduce the pesticide spraying on the human body damage, And according to its kinetic model, the experimental platform is established,study on droplet distribution, the main contents are as follows:Firstly, according to the mechanical characteristics of the rotor, the basic design parameters of the rotor are determined by comparing the two similar models of helicopter and rotor aircraft. The heading stability, longitudinal stability and the lateral stability of the rotor are analyzed, and the structural design of the rotor is carried out according to the analysis results. Analysis of the main characteristics of rotor machine with rotor hub system and vibration characteristics, for the hub design. According to the design parameters and the stability analysis results, the position and the motor parameters of the power system and the landing gear model are determined.. In order to facilitate the work of the rotor in the field, the design of the folding spraying mechanism is designed.. Structural design completed in accordance with the specific parameters of the modeling, and model was imported into ANSYS CFX module in the body to carry out analysis of flow field in CFX module set flow conditions, verifying the effect of fluid, the obtained simulation results and validate the fluid equilibrium value.Secondly, aiming at the installation position and the droplet drift spraying of key components of the analysis, this paper introduces the design of three factors and three levels of central composite test, on the nozzle installation position optimization of, through the design of the nozzle and the main rotor height difference, nozzle and the main rotor X axis, three factors of nozzle and the main rotor Y axis position and level selection. At the same time, the design matrix of a set of samples were collected, spray drift and effective spray range quality of two groups of data, the first data integration to design Matlab GUI interface display, droplet distribution range charts, in order to grasp the distribution.Finally, the data is imported into expert Design, and the optimal solution is obtained by the corresponding surface method.. Various factors relative drift influence is obtained as follows: nozzle and the main rotor height difference of nozzle and X axis of the main rotor position of the nozzle and the main rotor Y axis position; the influence degree of each factor for effective spray range quality is as follows: nozzle and the main rotor height difference of nozzle and X axis of the main rotor position of the nozzle and the main rotor Y axis position. The optimum design of the nozzle location is determined by the test results, and the optimum location of the nozzle is determined. Summed up the model of the pneumatic distribution of fog drops.The structure design of unmanned rotorcraft through, the fluid analysis combined with Solid-works, MATLAB and design expert and software the results analysis, nozzle installation of the optimal solution. The rationalization design of the whole machine.