Extreme vertices designs

The design matrix has been defined in accord with the theory of extreme vertices designing of experiments Table 3.34. 

III Mixture Design Composition-Property" Table 3.34 Extreme vertices design... 

A researcher s objective is to the establish optimal composition of a composite rocket propellant by ballistic properties such as burning rate and specific impulse. To achieve this, an extreme vertices design of experiment has been set up for these three components of the composition ... 

The extreme vertices design for a third-order regression model is given in Table 3.35. Regression coefficients for the impulse and burning rate at pressure of 70 bar and temperature of 25 °C are determined from experimental outcomes. 

Figure 3.18 Extreme vertices design of impulse contour lines Ns/kg Y3...

Figure 3.19 Extreme vertices design of burning rate contour lines cm/s...

To obtain a second-order regression model, an experiment by extreme vertices design has been done. The experiment included 45 trials including a simplex center for a check of lack of fit of the regression model and an estimate of experimental error, as shown in Table 3.59. 

MacLean, R., and Anderson, V, Extreme Vertices Design of Mixture Experiments, Technometrics, 8,447-454 (1966). 

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