| In recent years,with the growing fruit cropping industry in hilly and mountainous regions,the demand for plant protection operations in orchards is also increasing.Fruit and tree pest control is an important task,and it is also an important measure to ensure the yield and fruit quality.The orchard landscape in China is complex and the orchard is terraced.The large-scale plant protection machinery cannot be moved under the terraced orchard with multiple road conditions.Operators operate traditional backpack-type kits,which are labor-intensive and work inefficient;operators operate the process.In the body,the body is easily exposed to pesticides and there is a certain risk of production.In order to reduce the labor intensity of operators,improve the level of orchard mechanization,and meet the steady growth of production of forest fruit,this paper applies knowledge of mechanical principles,mechanical design,and circuit control principles,and comprehensively studies the research status of plant protection mobile platforms at home and abroad,according to the standardized land and landscape environment of mountain orchards,Designed and researched an online mixed-drug spray mobile platform(here in after referred to as mobile platform)for mountainous land orchards with multiple road conditions.The main research contents are as follows:(1)According to the functional requirements of the mobile platform,the main subsystem of the mobile platform is designed and demonstrated.The mobile platform chooses two kinds of moving mechanisms,which are the big wheel set and the Samsung wheel set.To facilitate the assembly of mobile modules,reel tubes mechanism,and the mixed drug and other functional modules,Select the frame structure of "d" shaped side beam and the 24 DC Brush motor drive mode.(2)Combining the working environment and working requirements of the mobile platform,SolidWorks 3D software was used to model the key components of the mobile platform.Virtual assembly of the modeling components of the mobile platform components to complete the virtual prototype motion simulation and interference inspection analysis of the mobile platform.(3)The ANSYS software is used to check the strength and stiffness of the key parts of the mobile platform and modal analysis,and optimize the structure according to the analysis results.The kinematics and dynamics simulation analysis of mobile platform climbing step is carried out by using ADAMS software.Based on the simulation analysis and optimization results,the virtual prototype model is determined.(4)Complete the physical prototype trial and carry out a series of experiments.The test results show that the maximum horizontal moving speed of the mobile platform after the assembly of large wheel group is 1.69m/s,the maximum height is 200 mm,the maximum climbing slope is 20 degrees,and the moving platform after the assembly of three star wheel can climb the step of the height of 225 mm,from the climbing vibration.In terms of dynamic impact and climbing speed,when the speed control knob swirled to 60% to 80% opening intervals,the climbing effect of the mobile platform was the best.Among them,the power consumption was the greatest when the moving platform climbed the slope,the limit time of its endurance was 4.34 h,the limit time of the climbing steps was 7.58 h,and the limit time of the flat ground movement was 11.92 h. |
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