Prop, band 25%
Combinations of methods of control
Three combinations of control systems are used in practice:
(a) Proportional plus integral.
(b) Proportional plus derivative.
(c) Proportional plus integral plus derivative.
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Metabolism. There isn’t perhaps a more frequently used word in the weight loss (and weight gain) vocabulary than this. Indeed, it’s not uncommon to overhear people talking about their struggles or triumphs over the holiday bulge or love handles in terms of whether their metabolism is working, or not.