Research On Hydraulic System Of Camellia Fruit Picking Mechanism Based On AMESim

On Toothed Comb Type Camellia Fruit Picking Machine hydraulic system of the theory of design can’t meet the requirements of actual work well,there will be a hydraulic shock,poor stability,coordination problems in complex movement,this article takes the team of independent research and development tooth comb type camellia fruit picking machine as the object,through theoretical calculation,co-simulation based on AMESim and Simcenter 3D and co-simulation based on AMESim and MATLAB,the three components as the implementation of the hydraulic cylinder pressure,flow,load,speed and displacement parameters changing with time curve and analysis,according to its influence law get optimal motion parameters optimized combination.The thesis contents and conclusions are as follows:(1)According to the working environment of the machine,the motion sequence of the hydraulic system and the type and quantity of the actuator are determined,and the maximum load of the actuator is calculated,and the typical hydraulic components are selected.The above results as a reference to design the hydraulic system schematic diagram.After the design of the hydraulic system is completed,the pressure loss and heat and temperature rise of the system are checked and calculated.(2)Machine Hydraulic system model is established based on the AMESim simulation software,among them,the Hydraulic library without Hydraulic components in the two-way Hydraulic lock with HCD library to modeling,according to the principle of two-way Hydraulic lock structure diagrams,lists the pressure balance equation,the calculated open than the key parameters,such as with HCD build two-way Hydraulic lock model in the library component,adjust parameters are encapsulated into the super element,for subsequent calls.Then,the Hydraulic system model of toothed comb type oil tea fruit picking machine is built with the Hydraulic components in the Hydraulic depot and the super components.After selecting the sub-model,parameters are set for each Hydraulic component according to the theoretical calculation results of the Hydraulic system.The machine dynamics model was established based on the simulation software of Simcenter 3D.After the 3D model of toothcomb camellia fruit picking machine was simplified,it was imported into Simcenter 3D in STEP format,and then the material,center of mass,inertial coordinate system and sports clothes were set for the model.After the models are established,AMESim is used as the main platform and Simcenter 3D as the auxiliary platform to build the joint simulation environment.After the simulation duration and printing interval are set,the simulation starts.After the simulation is completed,the hydraulic actuator parameter curve is called out for analysis.(3)According to the results of the co-simulation,the main problems of the original hydraulic system are analyzed.To solve the problem that the hydraulic cylinder cannot move precisely,which leads to the inaccurate positioning of the picking head,a PID control system is added to build a PID electro-hydraulic position servo system based on AMESim-MATLAB co-simulation experiment platform.After the simulation results are analyzed,the motion of the hydraulic cylinder is accurate and the picking head can be precisely positioned.In the original hydraulic system energy loss is serious,can’t resist flow saturation,complex movement coordination problems,the original quantitative pump hydraulic system after changing based on the compensation of load sensitive hydraulic system,set up based on AMESim-Simcenter 3D tooth comb type camellia fruit picking machine hydraulic system of load sensitive co-simulation experiment platform,the simulation results analysis,the variable pump output flow is consistent with the actual flow changes required,greatly reduce the energy loss,and flow saturation resistance is strong,complex motor coordination.This study is expected to provide technical guidance for the improved design and field operation of toothed comb and vibrating suspension type camellia fruit picking machines.