Parameter Calibration and Optimization of a Discrete Element Model of Plug Seedling Pots Based on a Collision Impact Force

To improve the accuracy of simulation parameters used in discrete element tests for transplanting operation machine and to facilitate further optimization crucial components machine, this paper, model 50-hole plug seedling pots was calibrated optimized based on collision impact force between pot steel plate measured by a flexible film network tactile pressure sensor. Basic determined contact pot, initial were screened significance using Plackett–Burman test. The pot-steel static friction coefficient, pot-pot restitution bond radius significantly affected simulated plate. According relative error value as evaluation index, steepest climbing test carried out three significant optimize their range. Based Box–Behnken test, second-order regression regulating interaction established, where target 11.78 N. optimal parameter combination is obtained optimizing parameters: coefficient 0.790, 0.325, 1.542 mm. results show that actual only 0.084%. are accurate reliable. research presented here can provide reference subsequent transplanter.