Key Technology Research And Prototype Development Of Intelligent Pushing Robot In Pasture

Stock farming is the pillar estate of China’s agriculture.Intelligent breeding is the development direction of animal husbandry.Pasture intelligent pushing equipment is the basis for improving production efficiency,changing development mode and enhancing the comprehensive production capacity of animal husbandry.For a long time,there are few intelligent pushing equipment independently developed by China,the core components and products mainly rely on imports,lack of corresponding technologies and solutions,there are many problems,such as mismatch between imported equipment and domestic pasture environment,unstable operation of domestic equipment and so on.Cause the comprehensive production cost of animal husbandry remains high and the income of pasture is low.This paper designs and develops the pasture intelligent pushing robot by the discrete element method.The main work contents are as follows:Firstly,the development status and characteristics of pasture feeding equipment at home and abroad are analyzed,and the research content and technical route of this paper are described.Then,depending on the working condition of the pasture pushing robot,the working principle and process of the pasture pushing robot are preliminarily formulated,designed the main mechanical structure and electronic control unit of the pushing robot,and use Solid Works 2020to carry out 3D solid modeling of each part.Then use ANSYS 2020 to carry out finite element analysis on the spiral pushing mechanism of the ranch pushing robot,and the rationality of pushing mechanism design and material selection is verified.Afterwards,an orthogonal experiment was carried out by using the discrete element method,and the relationships of the effects of feed water content,screw conveyor speed and robot forward speed on the pushing effect were analyzed by using EDEM 2020 software.After that,the prototype was assembled and debugged,and the experimental verification is carried out for the simulation test.Finally,combined with the simulation test and verification test results,the stability of the pasture intelligent pushing robot is preliminarily tested,and the pushing effect,trafficability and working life time of the pasture intelligent pushing robot are evaluated.Through analysis and tests,it can be seen that:the maximum principal stress of the screw pushing mechanism under full load is 1.15×10⁷pa,the maximum form variable is 5.6×10^-6m,indicating that the selection material and structural design fulfil requirements;that the influence of each factor on the pushing effect from large to small is:feed water content>robot forward speed>screw conveyor speed,and the best combination of influencing factors is:feed water content 50%,robot forward speed 0.3m/s,screw conveyor speed 72r/min;The average relative error between simulation test and verification test is less than 7.2%,indicating that the simulation model has certain accuracy;When the feed water content is 50%,the forward speed is 0.3m/s and the screw conveyor speed is 72r/min,can get the best pushing effect,the pushing rate can reach 98.8%.And with reasonable structural design,high stability and excellent performance,it can meet the actual use requirements of pasture,realize the unmanned and efficient operation of pushing work,and provide data basis and reference scheme for the intelligent upgrading of pasture.