*4.4. Optimal Parameters*

Taking the maximization of the collection rate as the objective, the optimization module in software Design-Expert 8.0 was used to solve the regression equation, thus determining the optimal solution. The equation set of the objective and constraints is expressed as Equation (10).


According to the optimized results, the optimal working parameters of the dandelion seed harvester were selected as follows: a forward speed of 0.8 m·s−1, a wind velocity of blowers of 1.63 m·s<sup>−</sup>1, and a rate of rotation of the drum of 418.7 rpm (rounded to 419 rpm). After adjusting the relevant parameters of the harvester, harvesting tests were conducted in which the collection rate reached 89.1% (as expected based on experimental evidence).
