3.1.2. Parameter Optimization and Verification

In order to achieve better material-conveying performance, the optimization module was used to optimize the regression model and set the solution target as the minimum response value [34]. The optimal parameter combination was obtained as follows: feed rate 8.06 kg/s, feed length of the stalk 377.19 mm, speed of the tangential threshing rotor 553.84 r/min. The optimal parameter combination was rounded as follows: feed rate of 8 kg/s, feed length of the stalk 380 mm, speed of the tangential threshing rotor 554 r/min, and conveying time 8.089 s. The optimized parameter combination was tested and verified. The average value of the five tests was taken, the conveying time was 8.105 s, and the relative error with the predicted value was 0.198%, verifying the reliability of the optimized parameters.
