Figure 3
The heat map titled “Enhanced Correlation Matrix” displays the correlation coefficients among seven machine parameters arranged along both the horizontal and vertical axes. The vertical and horizontal axes are both labeled, from top to bottom and left to right, respectively, as “Vibration underscore X,” “Vibration underscore Y,” “Temperature underscore C,” “Pressure underscore bar,” “Current underscore A,” “Acoustic underscore d B,” and “Energy subscript Consumption underscore kilowatt-hour.” Each square cell shows a numerical correlation coefficient between the two corresponding parameters. A vertical color scale on the right ranges from 0 in dark blue at the bottom to 1 at the top in dark red with an interval of 0.2. The data for the cells are as follows: Row 1: Column 1, 1.00 (dark red); Column 2, negative 0.04 (dark blue); Column 3, 0.02 (light blue); Column 4, negative 0.01 (blue); Column 5, negative 0.03 (blue); Column 6, negative 0.01 (blue); Column 7, 0.09 (light blue). Row 2: Column 1, negative 0.04 (blue); Column 2, 1.00 (dark red); Column 3, negative 0.01 (blue); Column 4, negative 0.05 (blue); Column 5, negative 0.02 (blue); Column 6, 0.02 (light blue); Column 7, negative 0.02 (blue). Row 3: Column 1, 0.02 (light blue); Column 2, negative 0.01 (blue); Column 3, 1.00 (dark red); Column 4, 0.02 (light blue); Column 5, 0.04 (light blue); Column 6, 0.00 (blue); Column 7, 0.04 (light blue). Row 4: Column 1, negative 0.01 (blue); Column 2, negative 0.05 (blue); Column 3, 0.02 (light blue); Column 4, 1.00 (dark red); Column 5, 0.02 (light blue); Column 6, 0.04 (light blue); Column 7, 0.02 (light blue). Row 5: Column 1, negative 0.03 (blue); Column 2, negative 0.02 (blue); Column 3, 0.04 (light blue); Column 4, 0.02 (light blue); Column 5, 1.00 (dark red); Column 6, negative 0.04 (blue); Column 7, 0.99 (dark red). Row 6: Column 1, negative 0.01 (blue); Column 2, 0.02 (light blue); Column 3, 0.00 (blue); Column 4, 0.04 (light blue); Column 5, negative 0.04 (blue); Column 6, 1.00 (dark red); Column 7, negative 0.04 (blue). Row 7: Column 1, 0.09 (light blue); Column 2, negative 0.02 (blue); Column 3, 0.04 (light blue); Column 4, 0.02 (light blue); Column 5, 0.99 (dark red); Column 6, negative 0.04 (blue); Column 7, 1.00 (dark red).Correlation matrix of critical machine parameters and energy consumption in smart manufacturing environments. Source(s): Author’s work