Simulation of Performance of Tracked Electric Lawn Mowers Based on Discrete Element Method
Aiming at the problems of high miss rate and large fuel pollution of orchard lawn mower,a crawler electric lawn mower suitable for hilly and mountainous areas is designed.SOLIDWORKS and EDEM software are used to complete the construction of the whole machine model and weed model,and the influence of the cutter speed and the cutter height on the miss rate under different cutter types is studied by single factor simulation experiment.The re-sults show that the miss rate decreases with the increase of the cutter speed and the decrease of the cutter height.Af-ter comparing the different cutting conditions under the condition of the cutter speed of 500 r/min and the cutter height of 75 mm,the force of the single cutter is the smallest.On this basis,the orthogonal simulation design of three factors and three levels is carried out,and the second-order polynomial response surface model is constructed to ana-lyze the interaction of the cutter type,the cutter speed and the cutter height.The optimal parameter combination is determined to be the single cutter,the speed is 1 017.439 r/min,and the height is 90.919 mm.According to the opti-mized parameters,the simulation experiment is carried out,and the value of the miss rate is 4.479,which meets the requirement of the miss rate ≤5％.This study can provide reference for the structure design and the optimization of the working parameters of the crawler electric lawn mower.
万方数据
维普
