Research On Blueberry Picking Mechanism And Influencing Factors Based On Dynamic Analysis Of Rigid-flexible Coupling

In recent years,the development of blueberry industry is rapid in China.In our country,blueberry harvest by manual operation,the blueberry fruit maturity is in June to August every year,because the blueberry fruit is acidic and its maturity is short near the rainy season,need to invest a lot of manpower for blueberry fruit harvest.According to the statistics,each year due to harvest without timely causing huge economic losses and resources waste.Study the blueberry plants and fruit growth mechanism,establishment and improvement of blueberry fruit picking theory,development and promotion of blueberry picking machine has important significance for the blueberry industry development and the realization of blueberry fruit harvest modernization and automation.In the first generation GYL062-1 type traction blueberry picking machine picking system,the compound connecting rod drive device existing the lacks such as force change being stable,so picking system transmission device is improved,the improved picking system that the grooved cam drives double rocker mechanism as the driving device.This paper focuses on improved picking system transmission device kinematics and dynamics research and the establishment of picking device transfer gap mechanical mode based MLSD collision theory,to analyze it solved,and the analysis of picking device transmission efficiency and energy loss,the simulation analysis and research for the picking machine design and development provides theoretical basis.Blueberry plants growth vibration model is established,using hypergeometric function as the kernel function of vibration model,calculation of the blueberry plant main vibration mode,regular mode and Duhamel integral type;Multi-Flex range of elastic deformation theory for solving picking collision force when picking machine and blueberry plants interactions,and in the process of picking blueberry plants vibration modes are classified;Use has been solving picking collision force and the Duhamel integral type,get vibration output response of the vibration of the each type for blueberry plant and vibration picking force of blueberry fruit;Analysis of blueberry picking working conditions and energy consumption of the blueberry plant vibration,based on the ANSYS to establish the blueberry plant flexible body,to establish the picking machine rigid body based on ADAMS,under ADAMS picking machine and blueberry plants for the coupled dynamic analysis and the research vibration picking process of blueberries,for exploring and improving the picking blueberries vibration mechanism lay the foundation.Analysis of the blueberry plant and soil interaction energy loss,analysis of the blueberry plant growth form under ideal condition,natural conditions and picking device action and mechanics model is set up;The equivalent stiffness of the interaction between soil and blueberry plants is obtained by "static deformation method",on the basis of the "kinetic energy is conserved" obtaining the blueberry plant equivalent mass,using "attenuation coefficient method" to solve the equivalent damping of soil action;Establish equivalent mechanical model interaction between picking machine,blueberry plants and soils,solved for blueberry plants and soil interaction vibration energy consumption,improve blueberry picking vibration theory.Using orthogonal experiment design method to reasonable design and arrangement experiment,experimental research is carried out by picking blueberries developed its own blueberry picking machine.Through the experimental observation and data analysis,it is proved that the established model is reasonable,assuming condition and calculation method are reasonable and the theory of picking is reasonable based on the dynamic analysis of rigid-flexible coupling;Analyze and process experimental data to get the optimal operating parameters of the picking machine,for its operating parameters select to provide theoretical guidance.