Design And Experiment Of Multi-function Remote Operation Platform In Orchard

As the orchard plantation mode changes and the labor cost increases,there are increasing demands on orchard machines in recent years.However in China,the complicated terrains and more hilly regions make some orchard machines difficult to meet orchard plantation requirements.In the process of orchard production,picking and transport of fruit account for more than a half of its whole process,both consume not only a large amount of labor force,cause the production cost increase,but also reduce the enthusiasm of fruit farmers for fruit production.In order to reduce labor cost,improve fruit quality and increase fruit farmers’ income,a safe,reliable,portable and efficient intelligent multifunctional orchard operation platform suitable for orchard operation environment is very necessary to research and develop.By analyzing the existing research results of orchard operation platform at home and abroad and the existing orchard technologies of China,a remote hillside orchard operation platform will be designed.In this paper,the theoretic analysis and optimization design was made for such orchard operation platform,and the research covers the contents as follows:1.Research background and significance.In this paper,the current development of orchard operation platform at home and abroad was analyzed and the development tendency of orchard operation platform at home was summarized.On the basis of consulting with the relevant literatures,a study method and content for remote hillside orchard operation platform was determined according to the plantation mode and technology requirements of China.2.Machine scheme and working principle of remote hillside orchard operation platform.On the basis of designing and selecting the type of key parts,including travelling mechanism,power plant,rack,leveling mechanism,lift mechanism and hydraulic system,a reliability analysis was made for the rack by using Solidworks simulation,the test result is that the maximum stress for rack 21.37 MPa,maximum displacement for the 0.43 mm,an optimization design was made for the leveling mechanism and lift mechanism by using ADAMS,the test result is that the lifting oil cylinder installation point(400,700),the driving force of the smallest 4993 N,and a modeling simulation and dynamic load analysis was made for the hydraulic leveling system by using AMESim;the simulation analysis results showed the remote hillside orchard operation platform was satisfactory to the practical operation requirements.3.Design of control system of remote hillside orchard operation platform.It includes the upper control system and the slave control system.The upper control system(MCGS)sends instructions to the slave control system to realize the adjustment on the moving posture of orchard operation platform;meanwhile the slave control system uploads the related information,such as moving angle and posture of operation platform etc.to the upper control system;both will realize the man-machine interaction.4.Determination of general plan on the basis of reliability analysis and optimization design.By making the prototype and by making performance test and research on it,the result showed operating platform for the largest linear travel offset 34.56 cm,relative to the measurement distance of 1.2%,turning radius of 139.6 cm,in the predetermined load and the operating range of the leveling accuracy within the 2°,realize an ideal leveling and better meet the use requirements.