Investigation of the pneumatic electromagnetic pulsator and claw milking machine by the method of the planned experiment

Abstract

The article is devoted to the problem of carrying out a multifactorial planned experiment and the derivation of a regression model in natural factors. The matrix of experiment planning for nonlinear regression dependence is given and an expanded matrix of orthogonal planning for calculating the coefficients of the second-order tri-factor model. The matrix for calculating the coefficients of the equation is given in the form of a table in which columns 2-11 form an orthogonal matrix of planning, column 12 is the value of the experiment response, the first eight experiments are a matrix of a complete factor experiment 23. The methodology and deduced dependencies and an example of calculation of corrected values of levels for the possibility of the properties of the orthogonality of the matrix of the plan are given.
The peculiarity of the given method of processing the experimental data is given by the dependences for the deduction of the coefficients of the regression equation and their recalculation to obtain a regressive dependence in the natural values of the factors. According to the results of experimental studies, a regression equation is derived which characterizes the dependence of the vacuum-pressure in the submersible chamber of the milking cup on the pulsation frequency, the ratio between the tats and the intensity of milk yield. The limits of the change in the pulsation frequency were 0.67-1.33 Hz, the intensity of milk yield varied from 33-45 grams / sec, the ratio between the steps was set at levels 0.67, 1.5 and 2.33. The pressure in the submersible chamber of the milk cup varied from 12 kPa to 18 kPa. The graphic model of the interpretation of regression dependence on experimental tributes is constructed. The criteria of Studenta, Fisher and Cochran have been calculated, which showed the reproducibility of the received model of the technological process using the pneumatic electromagnetic pulsator and claw of the milking machine.